CREDIT QUALITY ASSESSMENT - Allowance for Credit Loss Activity (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 136,242	$ 109,145	$ 109,145
Provision/ (credit) for credit losses - loans	(18,945)	1,635	26,680
Loan charge-offs	(171)	(306)	(1,105)
Loan recoveries	487	114	1,522
Net recoveries (charge-offs)	316	(192)	417
Balance at period end	117,613	110,588	$ 136,242
Provision/ (credit) for credit losses	(21,536)	$ 1,635
Unfunded commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision/ (credit) for credit losses	$ (2,600)