S000023781 [Member] Average Annual Total Returns

12 Months Ended

60 Months Ended

106 Months Ended

120 Months Ended

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

Class I

Prospectus [Line Items]

Average Annual Return, Percent

2.51%

(0.09%)

2.67%

Class I | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

2.51%

(0.21%)

2.31%

Class I | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

2.99%

0.57%

2.58%

Class N

Prospectus [Line Items]

Average Annual Return, Percent

2.23%

(0.44%)

2.28%

Class Z

Prospectus [Line Items]

Average Annual Return, Percent

2.56%

(0.03%)

2.83%

^[1]

Performance Inception Date

Feb. 24, 2017

Class Z | Bloomberg US Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)

Prospectus [Line Items]

Average Annual Return, Percent

4.25%

0.80%

2.48%

^[1]

2.34%

Performance Inception Date

Feb. 24, 2017

Class Z | Bloomberg US Municipal Bond BAA Index (reflects no deduction for fees, expenses, or taxes)

Prospectus [Line Items]

Average Annual Return, Percent

4.13%

1.57%

3.49%

^[1]

3.29%

Performance Inception Date

Feb. 24, 2017

[1]	Class Z and Index performance shown reflects performance since the inception date of the Fund's Class Z shares on February 24, 2017.