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LOANS AND CREDIT QUALITY - Activity in Allowance for Credit Losses by Loan Portfolio (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for credit losses by loan portfolio
Beginning balance	$ 64,294	$ 41,772	$ 41,470
Charge-offs	(2,349)	(2,009)	(587)
Recoveries	994	845	1,011
Provision	(15,816)	21,843	(122)
Ending balance	47,123	64,294	41,772
Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		1,843
Ending balance			1,843
Commercial loans | Real Estate Sector
Allowance for credit losses by loan portfolio
Beginning balance	27,935	22,535	20,250
Charge-offs	0	0	0
Recoveries	0	163	215
Provision	(6,449)	6,548	2,070
Ending balance	21,486	27,935	22,535
Commercial loans | Commercial and Industrial Sector
Allowance for credit losses by loan portfolio
Beginning balance	22,037	6,554	6,153
Charge-offs	(1,739)	(1,536)	(315)
Recoveries	146	110	147
Provision	(3,165)	18,858	569
Ending balance	17,279	22,037	6,554
Commercial loans | Cumulative Effect, Period of Adoption, Adjustment | Real Estate Sector
Allowance for credit losses by loan portfolio
Beginning balance		(1,311)
Ending balance			(1,311)
Commercial loans | Cumulative Effect, Period of Adoption, Adjustment | Commercial and Industrial Sector
Allowance for credit losses by loan portfolio
Beginning balance		(1,949)
Ending balance			(1,949)
Commercial loans | Non-owner occupied CRE
Allowance for credit losses by loan portfolio
Beginning balance	8,845	7,245	5,495
Charge-offs		0	0
Recoveries		0	0
Provision	(1,336)	4,992	1,750
Ending balance	7,509	8,845	7,245
Commercial loans | Non-owner occupied CRE | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		(3,392)
Ending balance			(3,392)
Commercial loans | Multifamily
Allowance for credit losses by loan portfolio
Beginning balance	6,072	7,015	5,754
Charge-offs		0	0
Recoveries		0	0
Provision	(218)	2,034	1,261
Ending balance	5,854	6,072	7,015
Commercial loans | Multifamily | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		(2,977)
Ending balance			(2,977)
Commercial loans | Construction/land development
Allowance for credit losses by loan portfolio
Beginning balance		8,275	9,001
Charge-offs
Recoveries			215
Provision			(941)
Ending balance			8,275
Commercial loans | Multifamily construction
Allowance for credit losses by loan portfolio
Beginning balance	4,903	2,848
Charge-offs		0
Recoveries		0
Provision	(4,396)	1,362
Ending balance	507	4,903	2,848
Commercial loans | Multifamily construction | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		693
Ending balance			693
Commercial loans | CRE construction
Allowance for credit losses by loan portfolio
Beginning balance	1,670	624
Charge-offs		0
Recoveries		0
Provision	(1,520)	1,161
Ending balance	150	1,670	624
Commercial loans | CRE construction | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		(115)
Ending balance			(115)
Commercial loans | Single family construction
Allowance for credit losses by loan portfolio
Beginning balance	5,130	3,800
Charge-offs		0
Recoveries	0	163
Provision	1,281	(3,113)
Ending balance	6,411	5,130	3,800
Commercial loans | Single family construction | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		4,280
Ending balance			4,280
Commercial loans | Single family construction to permanent
Allowance for credit losses by loan portfolio
Beginning balance	1,315	1,003
Charge-offs		0
Recoveries		0
Provision	(260)	112
Ending balance	1,055	1,315	1,003
Commercial loans | Single family construction to permanent | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		200
Ending balance			200
Commercial loans | Owner occupied CRE
Allowance for credit losses by loan portfolio
Beginning balance	4,994	3,639	3,278
Charge-offs		(896)
Recoveries		0	0
Provision	12	4,710	361
Ending balance	5,006	4,994	3,639
Commercial loans | Owner occupied CRE | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		(2,459)
Ending balance			(2,459)
Commercial loans | Commercial business
Allowance for credit losses by loan portfolio
Beginning balance	17,043	2,915	2,875
Charge-offs	(1,739)	(640)	(315)
Recoveries	146	110	147
Provision	(3,177)	14,148	208
Ending balance	12,273	17,043	2,915
Commercial loans | Commercial business | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		510
Ending balance			510
Consumer loans-single family
Allowance for credit losses by loan portfolio
Beginning balance	14,322	12,683	15,067
Charge-offs	(610)	(473)	(272)
Recoveries	848	572	649
Provision	(6,202)	(3,563)	(2,761)
Ending balance	8,358	14,322	12,683
Consumer loans-single family | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		5,103
Ending balance			5,103
Consumer loans-single family | Single family
Allowance for credit losses by loan portfolio
Beginning balance	6,906	6,450	8,217
Charge-offs	(127)	(17)	0
Recoveries	291	187	145
Provision	(2,676)	(182)	(1,912)
Ending balance	4,394	6,906	6,450
Consumer loans-single family | Single family | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		468
Ending balance			468
Consumer loans-single family | Home equity and other
Allowance for credit losses by loan portfolio
Beginning balance	7,416	6,233	6,850
Charge-offs	(483)	(456)	(272)
Recoveries	557	385	504
Provision	(3,526)	(3,381)	(849)
Ending balance	$ 3,964	7,416	6,233
Consumer loans-single family | Home equity and other | Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses by loan portfolio
Beginning balance		$ 4,635
Ending balance			$ 4,635

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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