LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses for Loans, Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 96,270	$ 106,094	$ 127,302
Charge-offs	(29,257)	(28,058)	(31,018)
Recoveries	6,723	7,220	10,311
Provision for Credit Losses	32,022	11,014	(501)
Balance at End of Period	105,357	96,270	106,094
Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	(401)
Balance at End of Period		(401)
Construction and commercial multifamily | Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	1,227	3,206	5,111
Charge-offs	(1)	0	0
Recoveries	0	0	0
Provision for Credit Losses	1,659	(1,979)	(1,905)
Balance at End of Period	2,885	1,227	3,206
Construction and commercial multifamily | Construction | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Construction and commercial multifamily | Commercial multifamily
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	1,810	6,120	5,916
Charge-offs	0	(94)	(404)
Recoveries	6	112	157
Provision for Credit Losses	659	(4,328)	451
Balance at End of Period	2,475	1,810	6,120
Construction and commercial multifamily | Commercial multifamily | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Commercial real estate loans | Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	10,739	12,752	12,380
Charge-offs	(489)	(687)	(1,640)
Recoveries	1,139	702	204
Provision for Credit Losses	(1,970)	(2,028)	1,808
Balance at End of Period	9,443	10,739	12,752
Commercial real estate loans | Commercial real estate owner occupied | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	24
Balance at End of Period		24
Commercial real estate loans | Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	30,724	32,106	35,850
Charge-offs	(65)	(5,894)	(14,557)
Recoveries	204	1,549	2,522
Provision for Credit Losses	7,358	2,963	8,291
Balance at End of Period	38,221	30,724	32,106
Commercial real estate loans | Commercial real estate non-owner occupied | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	18,743	22,584	25,013
Charge-offs	(17,872)	(18,447)	(10,841)
Recoveries	2,659	3,050	4,565
Provision for Credit Losses	15,095	11,556	3,847
Balance at End of Period	18,602	18,743	22,584
Commercial and industrial loans | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	(23)
Balance at End of Period		(23)
Residential real estate | Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	18,666	22,406	28,491
Charge-offs	(313)	(555)	(1,664)
Recoveries	610	1,019	1,767
Provision for Credit Losses	657	(4,204)	(6,188)
Balance at End of Period	19,622	18,666	22,406
Residential real estate | Residential real estate | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	2
Balance at End of Period		2
Consumer loans | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	2,173	4,006	6,482
Charge-offs	(88)	(166)	(334)
Recoveries	519	283	335
Provision for Credit Losses	(589)	(1,950)	(2,477)
Balance at End of Period	2,015	2,173	4,006
Consumer loans | Home equity | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Consumer loans | Consumer other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	12,188	2,914	8,059
Charge-offs	(10,429)	(2,215)	(1,578)
Recoveries	1,586	505	761
Provision for Credit Losses	9,153	10,984	(4,328)
Balance at End of Period	12,094	12,188	$ 2,914
Consumer loans | Consumer other | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ (404)
Balance at End of Period		$ (404)