LOANS HELD FOR INVESTMENT, NET - Loan Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loans held for investment, net:
Total	$ 10,869,328	$ 10,766,837
Fair value hedge basis point adjustments	2,615	6,591
Total loans, net of fair value hedge basis point adjustments	10,871,943	10,773,428
Allowance for credit losses	(88,751)	(71,743)
Total loans held for investment, net	10,783,192	10,701,685
Business Loans
Loans held for investment, net:
Total	2,725,726	2,308,171
Allowance for credit losses	(42,898)	(35,962)	$ (47,029)	$ (62,366)
One-to-Four Family Residential and Cooperative/Condominium Apartment
Loans held for investment, net:
Total	951,528	887,555
Allowance for credit losses	(9,501)	(6,813)	(5,969)	(5,932)
Multifamily Residential and Residential Mixed-Use
Loans held for investment, net:
Total	3,820,283	4,017,176
Allowance for credit losses	(11,946)	(7,237)	(8,360)	(7,816)
Non-Owner-Occupied Commercial Real Estate
Loans held for investment, net:
Total	3,230,535	3,379,667
Allowance for credit losses	(21,876)	(19,623)	(20,153)	(2,131)
Acquisition, development, and construction ("ADC")
Loans held for investment, net:
Total	136,172	168,513
Allowance for credit losses	(2,323)	(1,989)	(1,723)	(4,857)
Other Loans
Loans held for investment, net:
Total	5,084	5,755
Allowance for credit losses	$ (207)	$ (119)	$ (273)	$ (751)

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

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

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Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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