CREDIT QUALITY ASSESSMENT - Information on the Credit Quality of Loan Portfolio (Details) - Non-accrual status - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 46,086	$ 112,361
Loans placed on non-accrual	6,663	8,146
Non-accrual balances transferred to OREO	0	(257)
Non-accrual balances charged-off	(838)	(11,593)
Net payments or draws	(9,530)	(61,230)
Non-accrual loans brought current	(2,164)	(1,341)
Balance at end of period	40,217	46,086
Commercial real estate: | Commercial investor real estate
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	12,489	45,227
Loans placed on non-accrual	2,922	699
Non-accrual balances transferred to OREO	0	0
Non-accrual balances charged-off	0	(5,803)
Net payments or draws	(1,373)	(26,813)
Non-accrual loans brought current	0	(821)
Balance at end of period	14,038	12,489
Commercial real estate: | Commercial owner-occupied real estate
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	9,306	11,561
Loans placed on non-accrual	453	3,676
Non-accrual balances transferred to OREO	0	(257)
Non-accrual balances charged-off	0	(136)
Net payments or draws	(2,519)	(5,538)
Non-accrual loans brought current	(946)	0
Balance at end of period	6,294	9,306
Commercial real estate: | Commercial AD&C
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	650	15,044
Loans placed on non-accrual	0	49
Non-accrual balances transferred to OREO	0	0
Non-accrual balances charged-off	0	(2,007)
Net payments or draws	(650)	(12,436)
Non-accrual loans brought current	0	0
Balance at end of period	0	650
Commercial Business
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	8,420	22,933
Loans placed on non-accrual	1,229	1,339
Non-accrual balances transferred to OREO	0	0
Non-accrual balances charged-off	(677)	(3,547)
Net payments or draws	(1,774)	(12,305)
Non-accrual loans brought current	0	0
Balance at end of period	7,198	8,420
Residential real estate: | Residential mortgage
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	8,441	10,212
Loans placed on non-accrual	1,454	695
Non-accrual balances transferred to OREO	0	0
Non-accrual balances charged-off	(132)	0
Net payments or draws	(1,420)	(2,406)
Non-accrual loans brought current	(829)	(60)
Balance at end of period	7,514	8,441
Residential real estate: | Residential construction
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	55	0
Loans placed on non-accrual	0	62
Non-accrual balances transferred to OREO	0	0
Non-accrual balances charged-off	0	0
Net payments or draws	(55)	(7)
Non-accrual loans brought current	0	0
Balance at end of period	0	55
Consumer
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6,725	7,384
Loans placed on non-accrual	605	1,626
Non-accrual balances transferred to OREO	0	0
Non-accrual balances charged-off	(29)	(100)
Net payments or draws	(1,739)	(1,725)
Non-accrual loans brought current	(389)	(460)
Balance at end of period	$ 5,173	$ 6,725