LOANS AND ALLOWANCE - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 223,277	$ 195,397
Provision for credit losses	0	0
Recoveries on loans	844	1,052
Loans charged off	(1,069)	(465)
Ending balance	223,052	195,984
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	102,216	69,935
Provision for credit losses	(1,199)	7,571
Recoveries on loans	530	139
Loans charged off	(243)	(8)
Ending balance	101,304	77,637
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	46,839	60,665
Provision for credit losses	(583)	(8,250)
Recoveries on loans	56	707
Loans charged off	(4)	(122)
Ending balance	46,308	53,000
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	28,955	20,206
Provision for credit losses	(384)	554
Recoveries on loans	0	0
Loans charged off	0	0
Ending balance	28,571	20,760
Consumer & Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	45,267	44,591
Provision for credit losses	2,166	125
Recoveries on loans	258	206
Loans charged off	(822)	(335)
Ending balance	$ 46,869	$ 44,587