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LOANS HELD FOR INVESTMENT, NET - Deferral Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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CARES Act Loan [Abstract] |  |
Total Loans | $ 10,116,941 | $ 9,244,661
One-to-four family residential and cooperative/condominium apartment |  |
CARES Act Loan [Abstract] |  |
Total Loans | 722,081 | 669,282
Commercial real estate ("CRE") |  |
CARES Act Loan [Abstract] |  |
Total Loans | 4,264,519 | 3,945,948
Commercial and Industrial ("C&I") Loans |  |
CARES Act Loan [Abstract] |  |
Total Loans | $ 912,151 | $ 933,559

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