LOANS AND ALLOWANCE - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 204,681	$ 223,052	$ 204,934	$ 223,277
Provision for credit losses	24,500	0	26,500	0
Recoveries on loans	1,257	445	2,157	1,289
Loans charged off	(40,901)	(2,350)	(44,054)	(3,419)
Ending balance	189,537	221,147	189,537	221,147
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	99,213	101,304	97,348	102,216
Provision for credit losses	31,648	7,639	34,793	6,440
Recoveries on loans	536	66	1,087	596
Loans charged off	(40,180)	(636)	(42,011)	(879)
Ending balance	91,217	108,373	91,217	108,373
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	45,278	46,308	44,048	46,839
Provision for credit losses	75	(7,151)	1,603	(7,734)
Recoveries on loans	161	0	214	56
Loans charged off	0	0	(351)	(4)
Ending balance	45,514	39,157	45,514	39,157
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	20,369	28,571	24,823	28,955
Provision for credit losses	(6,009)	1,502	(10,463)	1,118
Recoveries on loans	0	0	0	0
Loans charged off	0	0	0	0
Ending balance	14,360	30,073	14,360	30,073
Consumer & Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	39,821	46,869	38,715	45,267
Provision for credit losses	(1,214)	(1,990)	567	176
Recoveries on loans	560	379	856	637
Loans charged off	(721)	(1,714)	(1,692)	(2,536)
Ending balance	$ 38,446	$ 43,544	$ 38,446	$ 43,544