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FAIR VALUE OF FINANCIAL INSTRUMENTS - Financial Instruments Not Measured at Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financial Assets [Abstract] |  |
Securities held-to-maturity | $ 528,530 | $ 516,930
Reported Value Measurement [Member] |  |
Financial Assets [Abstract] |  |
Cash and due from banks | 626,056 | 457,547
Securities held-to-maturity | 592,414 | 594,639
Loans held for investment, net | 10,805,969 | 10,695,349
Accrued interest receivable | 54,578 | 55,666
Financial Liabilities [Abstract] |  |
Savings, money market and checking accounts | 10,000,851 | 8,922,972
CDs | 1,416,467 | 1,607,683
FHLBNY Advances | 508,000 | 1,313,000
Subordinated debt, net | 272,300 | 200,196
Accrued interest payable | 14,845 | 17,298
Estimate of Fair Value Measurement [Member] |  |
Financial Assets [Abstract] |  |
Cash and due from banks | 626,056 | 457,547
Securities held-to-maturity | 528,530 | 516,930
Loans held for investment, net | 10,435,847 | 10,305,026
Accrued interest receivable | 54,578 | 55,666
Financial Liabilities [Abstract] |  |
Savings, money market and checking accounts | 10,000,851 | 8,922,972
CDs | 1,414,003 | 1,602,087
FHLBNY Advances | 508,764 | 1,312,940
Subordinated debt, net | 257,278 | 160,696
Accrued interest payable | 14,845 | 17,298
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Financial Assets [Abstract] |  |
Cash and due from banks | 626,056 | 457,547
Financial Liabilities [Abstract] |  |
Savings, money market and checking accounts | 10,000,851 | 8,922,972
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Financial Assets [Abstract] |  |
Securities held-to-maturity | 528,530 | 516,930
Accrued interest receivable | 5,813 | 6,593
Financial Liabilities [Abstract] |  |
CDs | 1,414,003 | 1,602,087
FHLBNY Advances | 508,764 | 1,312,940
Subordinated debt, net | 257,278 | 160,696
Accrued interest payable | 14,845 | 17,298
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Financial Assets [Abstract] |  |
Loans held for investment, net | 10,435,847 | 10,305,026
Accrued interest receivable | $ 48,765 | $ 49,073

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- Definition Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. + References No definition available. + Details
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- Definition Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits and saving deposits. + References No definition available. + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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