LOANS HELD FOR INVESTMENT, NET - Allowance for Credit Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Allowance for credit losses:
Allowance for credit losses, Beginning balance	$ 88,751
Provision (recovery) for credit losses	9,626	$ 5,210
Allowance for credit losses, Ending balance	90,455		$ 88,751
Non-accrual with No Allowance	35,286		21,652
Non-accrual with Allowance	22,755		27,827
Reserve	16,610		16,585
Interest income on non-accrual loans held for investment
Interest income on non-accrual loans	0	0
Business Loans
Allowance for credit losses:
Allowance for credit losses, Beginning balance	42,898	35,962	35,962
Provision (recovery) for credit losses	931	734
Charge-offs	(176)	(796)	(8,051)
Recoveries	262	81
Allowance for credit losses, Ending balance	43,915	35,981	42,898
Non-accrual with No Allowance	3,624		5,196
Non-accrual with Allowance	18,320		17,428
Reserve	16,297		15,810
One-to-Four Family Residential and Cooperative/Condominium Apartment
Allowance for credit losses:
Allowance for credit losses, Beginning balance	9,501	6,813	6,813
Provision (recovery) for credit losses	288	160
Charge-offs	(44)
Allowance for credit losses, Ending balance	9,745	6,973	9,501
Non-accrual with Allowance	3,763		3,213
Reserve	37		31
Multifamily Residential and Residential Mixed-Use
Allowance for credit losses:
Allowance for credit losses, Beginning balance	11,946	7,237	7,237
Provision (recovery) for credit losses	1,141	3,934
Charge-offs			(4,677)
Allowance for credit losses, Ending balance	13,087	11,171	11,946
Non-Owner-Occupied Commercial Real Estate
Allowance for credit losses:
Allowance for credit losses, Beginning balance	21,876	19,623	19,623
Provision (recovery) for credit losses	6,281	(178)
Charge-offs	(7,082)		(6,926)
Allowance for credit losses, Ending balance	21,075	19,445	21,876
Non-accrual with No Allowance	31,662		16,456
Non-accrual with Allowance	15		6,504
Reserve	15		432
Acquisition, development, and construction ("ADC")
Allowance for credit losses:
Allowance for credit losses, Beginning balance	2,323	1,989	1,989
Provision (recovery) for credit losses	37	333
Allowance for credit losses, Ending balance	2,360	2,322	2,323
Non-accrual with Allowance	657		657
Reserve	261		287
Other Loans
Allowance for credit losses:
Allowance for credit losses, Beginning balance	207	119	119
Provision (recovery) for credit losses	84	81
Charge-offs	(35)	(30)
Recoveries	17	6
Allowance for credit losses, Ending balance	273	176	207
Non-accrual with Allowance			25
Reserve			25
Total (includes other loans)
Allowance for credit losses:
Allowance for credit losses, Beginning balance	88,751	71,743	71,743
Provision (recovery) for credit losses	8,762	5,064
Charge-offs	(7,337)	(826)
Recoveries	279	87
Allowance for credit losses, Ending balance	$ 90,455	$ 76,068	$ 88,751