INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Allowance for credit losses	$ 33,323	$ 19,847
Purchase accounting adjustments—loans	13,807	10,264
Reserves and other accruals	23,189	16,444
Investments	1,579	2,038
Net operating losses	3,315	96
Derivatives	3,521	4,181
Employee benefit plans	181	1,340
Lease liabilities	33,236	33,501
Unrealized losses on available-for-sale securities	212,222	10,642
Other	1,179	383
Total deferred tax assets	325,552	98,736
Deferred tax liabilities:
Legal settlement	0	(3,150)
Accelerated depreciation	(5,994)	(4,467)
Right of use assets	(28,859)	(30,268)
Deferred loan costs	(53)	(230)
Intangibles	(35,610)	(20,897)
Other	(4,280)	(756)
Total deferred tax liabilities	(74,796)	(59,768)
Net deferred tax asset	$ 250,756	$ 38,968