ALLOWANCE FOR CREDIT LOSSES - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 48,305	$ 44,076	$ 19,943
Impact of adopting ASC 326			17,084
PCD ACL on acquired loans		4,410
Provision for credit losses	(2,025)	2,466	10,528
Loans charged off	(15,706)	(8,216)	(8,396)
Recoveries	9,205	5,569	4,917
Ending Balance	39,779	48,305	44,076
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	18,883	13,925	8,945
Impact of adopting ASC 326			6,843
PCD ACL on acquired loans		4,410
Provision for credit losses	(4,079)	1,637	(1,622)
Loans charged off	(3,917)	(2,158)	(1,097)
Recoveries	2,062	1,069	856
Ending Balance	12,949	18,883	13,925
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	18,316	19,142	1,302
Impact of adopting ASC 326			9,515
Provision for credit losses	(3,850)	(630)	8,612
Loans charged off	(657)	(812)	(944)
Recoveries	759	616	657
Ending Balance	14,568	18,316	19,142
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	10,721	11,009	8,304
Impact of adopting ASC 326			2,118
Provision for credit losses	6,131	1,074	3,538
Loans charged off	(11,132)	(5,246)	(6,355)
Recoveries	6,384	3,884	3,404
Ending Balance	12,104	10,721	11,009
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	385	0	1,392
Impact of adopting ASC 326			(1,392)
PCD ACL on acquired loans		0
Provision for credit losses	(227)	385	0
Loans charged off		0	0
Recoveries		0	0
Ending Balance	158	385	$ 0
Commercial Real Estate Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 18,883
Ending Balance		$ 18,883