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LOANS HELD FOR INVESTMENT, NET - Loan Categories (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022
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Loans held for investment, net: |  |  |  |  |  |
Total | $ 10,824,518 |  | $ 10,766,837 |  |  |
Fair value hedge basis point adjustments | 340 |  | 6,591 |  |  |
Total loans, net of fair value hedge basis point adjustments | 10,824,858 |  | 10,773,428 |  |  |
Allowance for credit losses | (77,812) |  | (71,743) |  |  |
Total loans held for investment, net | 10,747,046 |  | 10,701,685 |  |  |
Business Loans |  |  |  |  |  |
Loans held for investment, net: |  |  |  |  |  |
Total | 2,530,782 |  | 2,308,171 |  |  |
Allowance for credit losses | (37,115) | $ (35,981) | (35,962) | $ (39,700) | $ (43,879) | $ (47,029)
One-to-Four Family Residential and Cooperative/Condominium Apartment |  |  |  |  |  |
Loans held for investment, net: |  |  |  |  |  |
Total | 906,862 |  | 887,555 |  |  |
Allowance for credit losses | (7,305) | (6,973) | (6,813) | (6,419) | (6,012) | (5,969)
Multifamily Residential and Residential Mixed-Use |  |  |  |  |  |
Loans held for investment, net: |  |  |  |  |  |
Total | 3,920,327 |  | 4,017,176 |  |  |
Allowance for credit losses | (12,357) | (11,171) | (7,237) | (8,190) | (7,613) | (8,360)
Non-Owner-Occupied Commercial Real Estate |  |  |  |  |  |
Loans held for investment, net: |  |  |  |  |  |
Total | 3,314,988 |  | 3,379,667 |  |  |
Allowance for credit losses | (18,340) | (19,445) | (19,623) | (18,440) | (18,076) | (20,153)
Acquisition, development, and construction ("ADC") |  |  |  |  |  |
Loans held for investment, net: |  |  |  |  |  |
Total | 144,860 |  | 168,513 |  |  |
Allowance for credit losses | (2,455) | (2,322) | (1,989) | (2,558) | (2,515) | (1,723)
Other Loans |  |  |  |  |  |
Loans held for investment, net: |  |  |  |  |  |
Total | 6,699 |  | 5,755 |  |  |
Allowance for credit losses | $ (240) | $ (176) | $ (119) | $ (339) | $ (240) | $ (273)

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