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LOANS AND CREDIT QUALITY - Loans Held for Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans held for investment
Loans held for investment	$ 7,444,729	$ 7,422,904
Allowance for credit losses	(39,677)	(40,500)	$ (41,500)	$ (41,500)
Loans held for investment less allowance for credit losses	7,405,052	7,382,404
Recurring
Loans held for investment
Single family LHFI	1,285	1,280
Recurring | Level 3
Loans held for investment
Single family LHFI	1,285	1,280
Commercial loans
Loans held for investment
Loans held for investment	5,907,639	5,898,324
Commercial loans | Real Estate Sector
Loans held for investment
Loans held for investment	5,138,232	5,147,990
Allowance for credit losses	(28,900)	(27,912)	(27,680)	(27,859)
Commercial loans | Commercial and Industrial Sector
Loans held for investment
Loans held for investment	769,407	750,334
Allowance for credit losses	(3,482)	(3,849)	(4,326)	(4,277)
Commercial loans | Non-owner occupied CRE
Loans held for investment
Loans held for investment	633,401	641,885
Allowance for credit losses	(2,131)	(2,610)	(2,608)	(2,102)
Commercial loans | Multifamily
Loans held for investment
Loans held for investment	3,929,679	3,940,189
Allowance for credit losses	(18,947)	(13,093)	(9,787)	(10,974)
Commercial loans | Construction/land development
Loans held for investment
Loans held for investment	575,152	565,916
Commercial loans | Owner occupied CRE
Loans held for investment
Loans held for investment	381,943	391,285
Allowance for credit losses	(836)	(899)	(910)	(1,030)
Commercial loans | Commercial business
Loans held for investment
Loans held for investment	387,464	359,049
Allowance for credit losses	(2,646)	(2,950)	(3,416)	(3,247)
Consumer loans
Loans held for investment
Loans held for investment	1,537,090	1,524,580
Allowance for credit losses	(7,295)	(8,739)	(9,494)	(9,364)
Consumer loans | Single family
Loans held for investment
Loans held for investment	1,149,940	1,140,279
Allowance for credit losses	(4,273)	(5,287)	(5,804)	(5,610)
Consumer loans | Home equity and other
Loans held for investment
Loans held for investment	387,150	384,301
Allowance for credit losses	$ (3,022)	$ (3,452)	$ (3,690)	$ (3,754)

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