INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Allowance for credit losses	$ 40,518	$ 33,323
Purchase accounting adjustments—loans	10,285	13,807
Reserves and other accruals	25,093	23,189
Investments	763	1,579
Net operating losses	2,725	3,315
Derivatives	2,806	3,521
Lease liabilities	31,835	33,236
Unrealized losses on available-for-sale securities	186,775	212,222
Other	659	1,360
Total deferred tax assets	301,459	325,552
Deferred tax liabilities:
Accelerated depreciation	(5,790)	(5,994)
Right of use assets	(27,426)	(28,859)
Intangibles	(33,675)	(35,610)
Other	(4,306)	(4,333)
Total deferred tax liabilities	(71,197)	(74,796)
Net deferred tax asset	$ 230,262	$ 250,756