LOANS AND ALLOWANCE FOR CREDIT LOSSES - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 189,537	$ 221,147	$ 204,934	$ 223,277
Provision for credit losses - loans	5,000	5,000	31,500	5,000
Recoveries on loans	894	546	3,051	1,835
Loans charged off	(7,603)	(20,911)	(51,657)	(24,330)
Ending balance	187,828	205,782	187,828	205,782
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	91,217	108,373	97,348	102,216
Provision for credit losses - loans	8,456	3,020	43,249	9,460
Recoveries on loans	505	179	1,592	775
Loans charged off	(6,375)	(19,833)	(48,386)	(20,712)
Ending balance	93,803	91,739	93,803	91,739
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	45,514	39,157	44,048	46,839
Provision for credit losses - loans	1,873	4,901	3,476	(2,833)
Recoveries on loans	18	0	232	56
Loans charged off	0	0	(351)	(4)
Ending balance	47,405	44,058	47,405	44,058
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14,360	30,073	24,823	28,955
Provision for credit losses - loans	(2,609)	140	(13,072)	1,258
Recoveries on loans	0	0	0	0
Loans charged off	0	0	0	0
Ending balance	11,751	30,213	11,751	30,213
Consumer & Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	38,446	43,544	38,715	45,267
Provision for credit losses - loans	(2,720)	(3,061)	(2,153)	(2,885)
Recoveries on loans	371	367	1,227	1,004
Loans charged off	(1,228)	(1,078)	(2,920)	(3,614)
Ending balance	$ 34,869	$ 39,772	$ 34,869	$ 39,772