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
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