INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Allowance for credit losses	$ 42,441	$ 40,518
Purchase accounting adjustments—loans	8,094	10,285
Reserves and other accruals	33,250	25,093
Net operating losses	2,131	2,725
Derivatives	3,258	2,806
Lease liabilities	31,996	31,835
Unrealized losses on available-for-sale securities	193,956	186,775
Other	1,379	1,422
Total deferred tax assets	316,505	301,459
Deferred tax liabilities:
Accelerated depreciation	(5,735)	(5,790)
Right of use assets	(27,536)	(27,426)
Intangibles	(31,278)	(33,675)
Other	(3,795)	(4,306)
Total deferred tax liabilities	(68,344)	(71,197)
Net deferred tax asset	$ 248,161	$ 230,262