OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||||
| Letters of credit, outstanding amount | $ 1,230,000 | $ 2,170,000 | ||
| Allowance for credit losses | 85,431 | $ 83,746 | 83,629 | $ 81,058 |
| Provision for (reversal of) credit losses on loans | 3,160 | 2,851 | ||
| Unfunded Loan Commitment | ||||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||||
| Allowance for credit losses | 15,500 | $ 16,200 | ||
| Provision for (reversal of) credit losses on loans | $ 663 | $ 781 | ||