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LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for loan losses
Total loans	$ 8,335,309	$ 6,825,847
Allowance for credit losses	96,270	106,094	$ 127,302	$ 63,575
Net loans	8,239,039	6,719,753
Construction and commercial multifamily | Construction
Allowance for loan losses
Total loans	319,452	324,282
Allowance for credit losses	1,227	3,206	5,111	2,713
Construction and commercial multifamily | Commercial multifamily
Allowance for loan losses
Total loans	620,088	515,817
Allowance for credit losses	1,810	6,120	5,916	4,413
Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	640,489	606,477
Allowance for credit losses	10,739	12,752	12,380	4,880
Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	2,496,237	2,156,929
Allowance for credit losses	30,724	32,106	35,850	16,344
Commercial and industrial loans
Allowance for loan losses
Total loans	1,445,236	1,284,429
Allowance for credit losses	18,743	22,584	25,013	20,099
Residential real estate | Residential real estate
Allowance for loan losses
Total loans	2,312,447	1,489,248
Allowance for credit losses	18,666	22,406	28,491	9,970
Consumer loans | Home equity
Allowance for loan losses
Total loans	227,450	252,366
Allowance for credit losses	2,173	4,006	6,482	1,470
Consumer loans | Consumer other
Allowance for loan losses
Total loans	273,910	196,299
Allowance for credit losses	$ 12,188	$ 2,914	$ 8,059	$ 3,686

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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