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LOANS HELD FOR INVESTMENT, NET - Allowance for Credit Losses Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | $ 92,760 | $ 42,492 | $ 41,461 | $ 28,441 |
PCD Day 1 |  |  | 52,284 |  |
Provision (credit) for credit loss expense | (7,314) | 5,931 | 812 | 20,003 |
Charge-offs | (4,276) | (20) | (9,584) | (62) |
Recoveries | 85 | 89 | 201 | 110 |
Ending balance | 81,255 | 48,492 | 81,255 | 48,492 |
Non-accrual with No Allowance | 2,099 |  | 2,099 |  |
Non-accrual with Allowance | 31,921 |  | 31,921 |  |
Reserve |  |  | 13,155 |  |
Interest income on non-accrual loans | 0 |  | 0 |  |
Allowance for loan losses: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | $ 6,474
Collectively evaluated for impairment |  |  |  |  | 34,987
Total ending allowance balance | 81,255 | 48,492 | 81,255 | 48,492 | 41,461
Loans: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 17,069
Collectively evaluated for impairment |  |  |  |  | 5,604,975
Total ending loans balance |  |  |  |  | 5,622,044
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | (3,919) |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | (3,919)
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 37,542 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 37,542
Total real estate loans |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 62,166 | 28,973 | 28,712 | 15,555 |
PCD Day 1 |  |  | 28,753 |  |
Provision (credit) for credit loss expense | (10,203) | 6,038 | (2,689) | 19,484 |
Charge-offs | (3,011) | (19) | (3,852) | (61) |
Recoveries | 81 | 89 | 85 | 103 |
Ending balance | 49,033 | 35,081 | 49,033 | 35,081 |
Allowance for loan losses: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 28,712
Total ending allowance balance | 49,033 | 35,081 | 49,033 | 35,081 | 28,712
Loans: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 4,567
Collectively evaluated for impairment |  |  |  |  | 4,973,628
Total ending loans balance |  |  |  |  | 4,978,195
Total real estate loans | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | (1,976) |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | (1,976)
Total real estate loans | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 26,736 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 26,736
One-to-four family residential and cooperative/condominium apartment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 5,522 | 671 | 644 | 269 |
PCD Day 1 |  |  | 2,220 |  |
Provision (credit) for credit loss expense | 583 | 134 | 2,212 | 540 |
Charge-offs | (1) | (6) | (20) | (10) |
Recoveries |  | 0 |  |  |
Ending balance | 6,104 | 799 | 6,104 | 799 |
Non-accrual with Allowance | 4,938 |  | 4,938 |  |
Reserve |  |  | 781 |  |
Allowance for loan losses: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 644
Total ending allowance balance | 6,104 | 799 | 6,104 | 799 | 644
Loans: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 184,989
Total ending loans balance |  |  |  |  | 184,989
One-to-four family residential and cooperative/condominium apartment | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 1,048 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 1,048
One-to-four family residential and cooperative/condominium apartment | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 1,692 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 1,692
Multifamily residential and residential mixed-use |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 10,285 | 16,666 | 17,016 | 10,142 |
PCD Day 1 |  |  | 3,292 |  |
Provision (credit) for credit loss expense | (1,998) | 3,468 | (3,361) | 10,010 |
Charge-offs | (58) | (13) | (467) | (45) |
Recoveries | 78 | 89 | 81 | 103 |
Ending balance | 8,307 | 20,210 | 8,307 | 20,210 |
Non-accrual with No Allowance | 859 |  | 859 |  |
Allowance for loan losses: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 17,016
Total ending allowance balance | 8,307 | 20,210 | 8,307 | 20,210 | 17,016
Loans: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 1,863
Collectively evaluated for impairment |  |  |  |  | 2,756,880
Total ending loans balance |  |  |  |  | 2,758,743
Multifamily residential and residential mixed-use | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | (8,254) |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | (8,254)
Multifamily residential and residential mixed-use | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 8,762 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 8,762
Commercial real estate ("CRE") |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 41,201 | 9,859 | 9,059 | 3,900 |
PCD Day 1 |  |  | 23,124 |  |
Provision (credit) for credit loss expense | (8,649) | 2,162 | (4,068) | 8,127 |
Charge-offs | (2,952) | 0 | (3,365) | (6) |
Recoveries | 3 | 0 | 4 |  |
Ending balance | 29,603 | 12,021 | 29,603 | 12,021 |
Non-accrual with No Allowance | 1,240 |  | 1,240 |  |
Non-accrual with Allowance | 2,882 |  | 2,882 |  |
Reserve |  |  | 812 |  |
Allowance for loan losses: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 9,059
Total ending allowance balance | 29,603 | 12,021 | 29,603 | 12,021 | 9,059
Loans: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 2,704
Collectively evaluated for impairment |  |  |  |  | 1,875,463
Total ending loans balance |  |  |  |  | 1,878,167
Commercial real estate ("CRE") | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 4,849 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 4,849
Commercial real estate ("CRE") | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 13,908 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 13,908
Acquisition, development, and construction ("ADC") |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 5,158 | 1,777 | 1,993 | 1,244 |
PCD Day 1 |  |  | 117 |  |
Provision (credit) for credit loss expense | (139) | 274 | 2,528 | 807 |
Charge-offs |  | 0 |  |  |
Recoveries |  | 0 |  |  |
Ending balance | 5,019 | 2,051 | 5,019 | 2,051 |
Allowance for loan losses: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 1,993
Total ending allowance balance | 5,019 | 2,051 | 5,019 | 2,051 | 1,993
Loans: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 156,296
Total ending loans balance |  |  |  |  | 156,296
Acquisition, development, and construction ("ADC") | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 381 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 381
Acquisition, development, and construction ("ADC") | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 2,374 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 2,374
Commercial and Industrial ("C&I") Loans |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 30,095 | 13,502 | 12,737 | 12,870 |
PCD Day 1 |  |  | 23,374 |  |
Provision (credit) for credit loss expense | 1,943 | (107) | 2,215 | 518 |
Charge-offs | (497) | 0 | (4,959) |  |
Recoveries | 4 | 0 | 113 | 7 |
Ending balance | 31,545 | 13,395 | 31,545 | 13,395 |
Non-accrual with Allowance | 23,727 |  | 23,727 |  |
Reserve |  |  | 11,191 |  |
Allowance for loan losses: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 6,474
Collectively evaluated for impairment |  |  |  |  | 6,263
Total ending allowance balance | 31,545 | 13,395 | 31,545 | 13,395 | 12,737
Loans: |  |  |  |  |
Individually evaluated for impairment |  |  |  |  | 12,502
Collectively evaluated for impairment |  |  |  |  | 629,031
Total ending loans balance |  |  |  |  | 641,533
Commercial and Industrial ("C&I") Loans | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | (1,935) |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | (1,935)
Commercial and Industrial ("C&I") Loans | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 10,802 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | 10,802
Other Loans |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 499 | 17 | 12 | 16 |
PCD Day 1 |  |  | 157 |  |
Provision (credit) for credit loss expense | 946 |  | 1,286 | 1 |
Charge-offs | (768) | (1) | (773) | (1) |
Recoveries |  | 0 | 3 |  |
Ending balance | 677 | 16 | 677 | 16 |
Non-accrual with Allowance | 374 |  | 374 |  |
Reserve |  |  | 371 |  |
Allowance for loan losses: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 12
Total ending allowance balance | $ 677 | $ 16 | 677 | $ 16 | 12
Loans: |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  | 2,316
Total ending loans balance |  |  |  |  | 2,316
Other Loans | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | (8) |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | (8)
Other Loans | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance |  |  | $ 4 |  |
Allowance for loan losses: |  |  |  |  |
Total ending allowance balance |  |  |  |  | $ 4

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