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LOANS HELD FOR INVESTMENT, NET - Deferral Loans (Details) $ in Thousands | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($)
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CARES Act Loan [Abstract] |  |
Principal balances outstanding | $ 9,244,661 | $ 5,622,044
COVID-19 [Member] |  |
CARES Act Loan [Abstract] |  |
Number of loans | loan | 7 |
Principal balances outstanding | $ 5,660 |
% of portfolio | 0.10% |
One-to-four family residential and cooperative/condominium apartment |  |
CARES Act Loan [Abstract] |  |
Principal balances outstanding | $ 669,282 | 184,989
One-to-four family residential and cooperative/condominium apartment | COVID-19 [Member] |  |
CARES Act Loan [Abstract] |  |
Number of loans | loan | 5 |
Principal balances outstanding | $ 1,922 |
% of portfolio | 0.30% |
Commercial real estate ("CRE") |  |
CARES Act Loan [Abstract] |  |
Principal balances outstanding | $ 3,945,948 | 1,878,167
Commercial real estate ("CRE") | COVID-19 [Member] |  |
CARES Act Loan [Abstract] |  |
Number of loans | loan | 1 |
Principal balances outstanding | $ 3,487 |
% of portfolio | 0.10% |
Commercial and Industrial ("C&I") Loans |  |
CARES Act Loan [Abstract] |  |
Principal balances outstanding | $ 933,559 | $ 641,533
Commercial and Industrial ("C&I") Loans | COVID-19 [Member] |  |
CARES Act Loan [Abstract] |  |
Number of loans | loan | 1 |
Principal balances outstanding | $ 251 |

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- References No definition available. + Details
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- Definition The number of loans approved for deferral by bank due to COVID-19 pandemic. + References No definition available. + Details
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- Definition The percentage of loans approved for deferral by bank due to COVID-19 pandemic. + References No definition available. + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + Details
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