v3.26.1
Consolidated Schedule of Investments - Derivative Instruments
€ in Thousands, £ in Thousands, kr in Thousands, $ in Thousands, $ in Thousands, $ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
CAD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
AUD ($)
Dec. 31, 2025
NOK (kr)
Dec. 31, 2024
USD ($)
Open Forward Foreign Currency Contract [Line Items]              
Unrealized Appreciation / (Depreciation) $ (22,867)           $ (28,598)
Fair Value             (28,598)
Notional Amount             2,450,000
Unrealized Appreciation / (Depreciation)             8,506
Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Fair Value 58,008            
Notional Amount 5,400,000            
Upfront Payments/Receipts 0            
Unrealized Appreciation / (Depreciation) 86,606            
March 2028 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Unrealized Appreciation / (Depreciation) 15,966           (1,505)
Fair Value $ 14,461           $ (1,505)
Company Receives 5.70% 5.70% 5.70% 5.70% 5.70% 5.70% 5.70%
Notional Amount $ 1,000,000           $ 1,000,000
Upfront Payments/Receipts $ 0            
March 2028 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 1.649% 1.649% 1.649% 1.649% 1.649% 1.649% 1.649%
September 2028 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Fair Value $ 4,677            
Company Receives 5.45% 5.45% 5.45% 5.45% 5.45% 5.45%  
Notional Amount $ 600,000            
Upfront Payments/Receipts 0            
Unrealized Appreciation / (Depreciation) $ 4,677            
September 2028 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 1.7465% 1.7465% 1.7465% 1.7465% 1.7465% 1.7465%  
January 2029 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Unrealized Appreciation / (Depreciation) $ (3,021)            
Fair Value $ (3,021)            
Company Receives 4.85% 4.85% 4.85% 4.85% 4.85% 4.85%  
Notional Amount $ 600,000            
Upfront Payments/Receipts $ 0            
January 2029 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 1.622% 1.622% 1.622% 1.622% 1.622% 1.622%  
August 2029 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Unrealized Appreciation / (Depreciation) $ 15,659            
Fair Value $ 16,585           $ 926
Company Receives 6.35% 6.35% 6.35% 6.35% 6.35% 6.35% 6.35%
Notional Amount $ 700,000           $ 700,000
Upfront Payments/Receipts $ 0            
Unrealized Appreciation / (Depreciation)             $ 926
August 2029 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 2.208% 2.208% 2.208% 2.208% 2.208% 2.208% 2.208%
February 2030 Notes              
Open Forward Foreign Currency Contract [Line Items]              
Notional Amount $ 750,000            
February 2030 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Unrealized Appreciation / (Depreciation)             $ (28,019)
Fair Value $ (5,199)           $ (28,019)
Company Receives 5.60% 5.60% 5.60% 5.60% 5.60% 5.60% 5.60%
Notional Amount $ 750,000           $ 750,000
Upfront Payments/Receipts 0            
Unrealized Appreciation / (Depreciation) $ 22,820            
February 2030 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 2.302% 2.302% 2.302% 2.302% 2.302% 2.302% 2.302%
September 2030 Notes              
Open Forward Foreign Currency Contract [Line Items]              
Notional Amount $ 500,000            
September 2030 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Fair Value $ 5,239            
Company Receives 5.80% 5.80% 5.80% 5.80% 5.80% 5.80%  
Notional Amount $ 500,000            
Upfront Payments/Receipts 0            
Unrealized Appreciation / (Depreciation) $ 5,239            
September 2030 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 2.049% 2.049% 2.049% 2.049% 2.049% 2.049%  
January 2031 Notes              
Open Forward Foreign Currency Contract [Line Items]              
Notional Amount $ 500,000            
January 2031 Notes | Interest rate swaps              
Open Forward Foreign Currency Contract [Line Items]              
Unrealized Appreciation / (Depreciation) (6,380)            
Fair Value $ (6,380)            
Company Receives 5.15% 5.15% 5.15% 5.15% 5.15% 5.15%  
Notional Amount $ 500,000            
Upfront Payments/Receipts $ 0            
January 2031 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 1.946% 1.946% 1.946% 1.946% 1.946% 1.946%  
March 2032 Notes              
Open Forward Foreign Currency Contract [Line Items]              
Fair Value $ 31,646            
Company Receives 6.20% 6.20% 6.20% 6.20% 6.20% 6.20%  
Notional Amount $ 750,000            
Upfront Payments/Receipts 0            
Unrealized Appreciation / (Depreciation) $ 31,646            
March 2032 Notes | Interest rate swaps | Designated as Hedging Instrument              
Open Forward Foreign Currency Contract [Line Items]              
Fund Pays 1.829% 1.829% 1.829% 1.829% 1.829% 1.829%  
Open Forward Foreign Currency Contract, Identifier [Axis]: AUD, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 1,390           $ 1,390
Notional Amount to be Sold   £ 2,097         $ 2,097
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (12)            
Unrealized Appreciation / (Depreciation)             $ 87
Open Forward Foreign Currency Contract, Identifier [Axis]: AUD, Canadian Imperial Bank of Commerce 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 1,294           $ 1,294
Notional Amount to be Sold   £ 1,960         $ 1,960
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (10)            
Unrealized Appreciation / (Depreciation)             $ 77
Open Forward Foreign Currency Contract, Identifier [Axis]: AUD, Canadian Imperial Bank of Commerce 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 607            
Notional Amount to be Sold | £   £ 932          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (8)            
Open Forward Foreign Currency Contract, Identifier [Axis]: AUD, Canadian Imperial Bank of Commerce 3              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 478            
Notional Amount to be Sold | £   £ 736          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (13)            
Open Forward Foreign Currency Contract, Identifier [Axis]: AUD, Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 6,165           $ 6,165
Notional Amount to be Sold       € 9,518     $ 9,518
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (162)            
Unrealized Appreciation / (Depreciation)             $ 248
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 57,178           $ 20,510
Notional Amount to be Sold         $ 62,493   $ 27,531
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (843)            
Unrealized Appreciation / (Depreciation)             $ 841
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Canadian Imperial Bank of Commerce 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 25,450           $ 4,503
Notional Amount to be Sold       € 35,598     $ 6,062
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (852)            
Unrealized Appreciation / (Depreciation)             $ 138
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Canadian Imperial Bank of Commerce 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 20,769            
Notional Amount to be Sold | €       € 27,895      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ 216            
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Canadian Imperial Bank of Commerce 3              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 14,323            
Notional Amount to be Sold | €       € 19,837      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (407)            
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Canadian Imperial Bank of Commerce 4              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 13,108            
Notional Amount to be Sold | €       € 18,267      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (219)            
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Canadian Imperial Bank of Commerce 5              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 4,983            
Notional Amount to be Sold | €       € 6,713      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ 18            
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 16,144           $ 20,350
Notional Amount to be Sold       € 22,503     $ 29,231
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (273)            
Unrealized Appreciation / (Depreciation)             $ 9
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Wells Fargo Bank, N.A. 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 1,017           $ 1,017
Notional Amount to be Sold   £ 1,391         $ 1,391
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (8)            
Unrealized Appreciation / (Depreciation)             $ 24
Open Forward Foreign Currency Contract, Identifier [Axis]: CHF, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 471            
Notional Amount to be Sold | £   £ 373          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (1)            
Open Forward Foreign Currency Contract, Identifier [Axis]: DKK, Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 4,773            
Notional Amount to be Sold | €       € 29,850      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (49)            
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 169,576           $ 98,069
Notional Amount to be Sold   £ 148,885         $ 95,089
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (636)            
Unrealized Appreciation / (Depreciation)             $ 941
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 61,809            
Notional Amount to be Sold     $ 60,251        
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (967)            
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 10              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 50
Notional Amount to be Sold             $ 45
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 11              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 49
Notional Amount to be Sold             $ 44
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 12              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 45
Notional Amount to be Sold             $ 43
Counterparty             asif:WellsFargoBankNAMember
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 49,860           $ 2,725
Notional Amount to be Sold         $ 45,000   $ 2,456
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (4,429)            
Unrealized Appreciation / (Depreciation)             $ 116
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 3              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 8,132           $ 2,164
Notional Amount to be Sold       € 6,722     $ 1,938
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (17)            
Unrealized Appreciation / (Depreciation)             $ 100
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 4              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 3,074           $ 972
Notional Amount to be Sold       € 2,737     $ 858
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (193)            
Unrealized Appreciation / (Depreciation)             $ 42
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 5              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 2,824            
Notional Amount to be Sold | €       € 2,540      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (171)            
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 6              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 2,443           $ 482
Notional Amount to be Sold   £ 2,178         $ 440
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (128)            
Unrealized Appreciation / (Depreciation)             $ 26
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 7              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 1,957           $ 81
Notional Amount to be Sold       € 1,737     $ 72
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (140)            
Unrealized Appreciation / (Depreciation)             $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 8              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 1,906           $ 51
Notional Amount to be Sold       € 1,737     $ 45
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (142)            
Unrealized Appreciation / (Depreciation)             $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Canadian Imperial Bank of Commerce 9              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 81           $ 50
Notional Amount to be Sold   £ 72         $ 45
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (4)            
Unrealized Appreciation / (Depreciation)             $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, SMBC Capital Markets, Inc.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 16,256            
Notional Amount to be Sold | €       € 13,416      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (8)            
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 115,234           $ 44,113
Notional Amount to be Sold     $ 98,626       $ 42,176
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (670)            
Unrealized Appreciation / (Depreciation)             $ 832
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 77,740           $ 20,138
Notional Amount to be Sold   £ 64,937         $ 18,133
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (209)            
Unrealized Appreciation / (Depreciation)             $ 473
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 51,458           $ 1,552
Notional Amount to be Sold         $ 46,454   $ 1,396
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (4,587)            
Unrealized Appreciation / (Depreciation)             $ 17
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 3              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 21,805           $ 1,525
Notional Amount to be Sold       € 19,538     $ 1,396
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (1,534)            
Unrealized Appreciation / (Depreciation)             $ 19
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 4              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 9,097           $ 1,422
Notional Amount to be Sold       € 7,487     $ 1,312
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ 20           $ 63
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 5              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 3,324           $ 747
Notional Amount to be Sold       € 2,798     $ 698
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (30)            
Unrealized Appreciation / (Depreciation)             $ 10
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 6              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 1,906            
Notional Amount to be Sold | £   £ 1,713          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (156)            
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Wells Fargo Bank, N.A. 7              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 1,873            
Notional Amount to be Sold | £   £ 1,713          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (167)            
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 117,951           $ 49,967
Notional Amount to be Sold   £ 103,745         $ 39,278
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (2,002)            
Unrealized Appreciation / (Depreciation)             $ 928
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Canadian Imperial Bank of Commerce 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 59,899           $ 21,351
Notional Amount to be Sold     $ 46,812       $ 16,784
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (2,891)            
Unrealized Appreciation / (Depreciation)             $ 402
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Canadian Imperial Bank of Commerce 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 49,970           $ 8,569
Notional Amount to be Sold         $ 37,428   $ 6,582
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (119)            
Unrealized Appreciation / (Depreciation)             $ 336
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Canadian Imperial Bank of Commerce 3              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 15,755           $ 5,684
Notional Amount to be Sold       € 11,800     $ 4,502
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (123)            
Unrealized Appreciation / (Depreciation)             $ 69
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Canadian Imperial Bank of Commerce 4              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 6,908           $ 4,217
Notional Amount to be Sold       € 6,137     $ 3,347
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (361)            
Unrealized Appreciation / (Depreciation)             $ 42
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Canadian Imperial Bank of Commerce 5              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 4,217            
Notional Amount to be Sold | €       € 3,347      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (284)            
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, SMBC Capital Markets, Inc.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 49,790            
Notional Amount to be Sold | kr           kr 37,090  
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ 158            
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 49,964           $ 18,890
Notional Amount to be Sold         $ 37,428   $ 15,184
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (125)           $ (52)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 35,977           $ 15,895
Notional Amount to be Sold         $ 26,695   $ 12,458
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ 166           $ 313
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 18,890           $ 874
Notional Amount to be Sold       € 15,184     $ 720
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (1,529)           $ (25)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 3              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 8,142           $ 583
Notional Amount to be Sold       € 6,100     $ 480
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (66)           $ (17)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 4              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 2,504            
Notional Amount to be Sold | €       € 1,915      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (65)            
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 5              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 874            
Notional Amount to be Sold | £   £ 720          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (95)            
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 6              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 619            
Notional Amount to be Sold | £   £ 480          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (26)            
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Wells Fargo Bank, N.A. 7              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 561            
Notional Amount to be Sold | £   £ 419          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Open Forward Foreign Currency Contract, Identifier [Axis]: JPY, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 20,497            
Notional Amount to be Sold | €       € 2,121,107      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ 957            
Open Forward Foreign Currency Contract, Identifier [Axis]: NOK, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 2,502           $ 2,502
Notional Amount to be Sold       € 27,017     $ 27,017
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ (175)            
Unrealized Appreciation / (Depreciation)             $ 128
Open Forward Foreign Currency Contract, Identifier [Axis]: NOK, Canadian Imperial Bank of Commerce 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 2,011            
Notional Amount to be Sold | £   £ 20,371          
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ (8)            
Open Forward Foreign Currency Contract, Identifier [Axis]: NOK, Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract  
Notional Amount to be Purchased $ 66,170            
Notional Amount to be Sold | €       € 663,462      
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember  
Unrealized Appreciation / (Depreciation) $ 414            
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 2,555           $ 1,328
Notional Amount to be Sold       € 4,070     $ 2,178
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ 95           $ 92
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce 1              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 34           $ 39
Notional Amount to be Sold   £ 54         $ 62
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ 2           $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce 2              
Open Forward Foreign Currency Contract [Line Items]              
Description Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract Foreign currency forward contract
Notional Amount to be Purchased $ 33           $ 37
Notional Amount to be Sold   £ 52         $ 60
Counterparty asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation) $ 1           $ 3
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce 3              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 37
Notional Amount to be Sold             $ 59
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 2
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce 4              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 35
Notional Amount to be Sold             $ 55
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 2
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce 5              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 34
Notional Amount to be Sold             $ 54
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 2
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Canadian Imperial Bank of Commerce 6              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 33
Notional Amount to be Sold             $ 52
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 2
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A.              
Open Forward Foreign Currency Contract [Line Items]              
Description             Foreign currency forward contract
Notional Amount to be Purchased             $ 307,682
Notional Amount to be Sold             $ 910,877
Counterparty             asif:WellsFargoBankNAMember
Unrealized Appreciation / (Depreciation)             $ 2,198