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Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Selected Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | $ 73,131 | $ 73,711
Securities available for sale | 943,519 | 826,881
Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps | (6,179) | 2,401
Interest rate swaps | 22,016 | 18,407
Collateralized Mortgage Backed Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale |  | 454,320
Reported Value Measurement [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and due from banks | 200,926 | 151,754
Loans | 6,896,074 | 6,934,769
FHLB-NY stock | 43,821 | 45,842
Accrued interest receivable | 55,660 | 45,048
Deposits | 6,681,509 | 6,485,342
Borrowed Funds | 1,001,010 | 1,052,973
Accrued interest payable | 10,001 | 10,034
Reported Value Measurement [Member] | Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps | 104,576 | 74,856
Interest rate swaps | 22,016 | 18,407
Reported Value Measurement [Member] | Collateralized Mortgage Backed Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | 7,860 | 7,875
Securities available for sale | 337,879 | 384,283
Reported Value Measurement [Member] | Other Debt Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | 65,271 | 65,836
Securities available for sale | 505,784 | 351,074
Estimate of Fair Value Measurement [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and due from banks | 200,926 | 151,754
Loans | 6,511,963 | 6,651,795
FHLB-NY stock | 43,821 | 45,842
Accrued interest receivable | 55,660 | 45,048
Deposits | 6,630,112 | 6,453,978
Borrowed Funds | 950,476 | 1,027,370
Accrued interest payable | 10,001 | 10,034
Estimate of Fair Value Measurement [Member] | Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps | 104,576 | 74,856
Interest rate swaps | 22,016 | 18,407
Estimate of Fair Value Measurement [Member] | Collateralized Mortgage Backed Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | 6,634 | 6,989
Securities available for sale | 337,879 | 384,283
Estimate of Fair Value Measurement [Member] | Other Debt Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | 51,031 | 55,561
Securities available for sale | 505,784 | 351,074
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and due from banks | 200,926 | 151,754
Deposits | 4,360,140 | 4,959,004
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Other Debt Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 11,066 | 11,211
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
FHLB-NY stock | 43,821 | 45,842
Accrued interest receivable | 6,723 | 3,819
Deposits | 2,269,972 | 1,494,974
Borrowed Funds | 902,147 | 976,863
Accrued interest payable | 10,001 | 10,034
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest rate swaps | 104,576 | 74,856
Interest rate swaps | 22,016 | 18,407
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | 6,634 | 6,989
Securities available for sale | 337,879 | 384,283
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Other Debt Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale | 493,267 | 338,347
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans | 6,511,963 | 6,651,795
Accrued interest receivable | 48,937 | 41,229
Borrowed Funds | 48,329 | 50,507
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Other Debt Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities held-to-maturity | 51,031 | 55,561
Securities available for sale | $ 1,451 | $ 1,516

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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
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