SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||||
| Beginning Balance | $ 1,717,021 | $ 1,718,949 | $ 1,525,646 | $ 1,489,026 | $ 1,718,949 | $ 1,489,026 |
| Other comprehensive (loss)/income before reclassifications | (1,894) | (13,121) | (28,084) | 482 | ||
| Amounts reclassified from AOCI | (1,269) | (2,736) | (3,532) | (6,000) | ||
| Other comprehensive loss net of tax | (3,163) | (28,453) | (15,857) | 10,339 | (31,616) | (5,518) |
| Ending Balance | 1,854,434 | 1,717,021 | 1,544,307 | 1,525,646 | 1,854,434 | 1,544,307 |
| Accumulated Other comprehensive (loss)/ income: | ||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||||
| Beginning Balance | (15,071) | 13,382 | (1,808) | (12,147) | 13,382 | (12,147) |
| Other comprehensive loss net of tax | (3,163) | (28,453) | (15,857) | 10,339 | ||
| Ending Balance | (18,234) | (15,071) | (17,665) | (1,808) | (18,234) | (17,665) |
| Available-for-Sale Securities | ||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||||
| Beginning Balance | (25,317) | 2,811 | (20,384) | (37,575) | 2,811 | (37,575) |
| Other comprehensive (loss)/income before reclassifications | (4,500) | (11,727) | (32,626) | 5,467 | ||
| Amounts reclassified from AOCI | (2) | (2) | (4) | (5) | ||
| Other comprehensive loss net of tax | (4,502) | (11,729) | (32,630) | 5,462 | ||
| Ending Balance | (29,819) | (25,317) | (32,113) | (20,384) | (29,819) | (32,113) |
| Held-to-Maturity Securities | ||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||||
| Beginning Balance | (9,555) | (9,246) | (9,465) | (9,226) | (9,246) | (9,226) |
| Other comprehensive (loss)/income before reclassifications | 0 | 0 | 0 | 0 | ||
| Amounts reclassified from AOCI | 676 | 225 | 367 | (14) | ||
| Other comprehensive loss net of tax | 676 | 225 | 367 | (14) | ||
| Ending Balance | (8,879) | (9,555) | (9,240) | (9,465) | (8,879) | (9,240) |
| Cash Flow Hedges | ||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||||
| Beginning Balance | 19,801 | 19,817 | 28,041 | 34,654 | 19,817 | 34,654 |
| Other comprehensive (loss)/income before reclassifications | 2,606 | (1,394) | 4,542 | (4,985) | ||
| Amounts reclassified from AOCI | (1,943) | (2,959) | (3,895) | (5,981) | ||
| Other comprehensive loss net of tax | 663 | (4,353) | 647 | (10,966) | ||
| Ending Balance | $ 20,464 | $ 19,801 | $ 23,688 | $ 28,041 | $ 20,464 | $ 23,688 |