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Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Selected Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Securities held-to-maturity, amortized cost	$ 74,115	$ 57,868
Securities available for sale, fair value	857,654	777,236
Interest Rate Swap [Member]
Interest Rate Swaps, Net Amount	15,013	10,683
Interest rate swaps	13,258	3,544
Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, amortized cost	7,885	7,894
Securities available for sale, fair value	510,934	572,184
Other Debt Obligations [Member]
Securities held-to-maturity, amortized cost	66,230	49,974
Securities available for sale, fair value	346,720	205,052
Reported Value Measurement [Member]
Cash and due from banks	137,026	81,723
Loans	6,760,393	6,638,105
FHLB-NY stock	50,017	35,937
Accrued interest receivable	38,811	38,698
Deposits	6,407,577	6,385,445
Borrowings	1,089,621	815,544
Accrued interest payable	5,637	4,777
Reported Value Measurement [Member] | Interest Rate Swap [Member]
Interest Rate Swaps, Net Amount	53,985	10,683
Interest rate swaps	13,258	25,071
Reported Value Measurement [Member] | Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, amortized cost	7,885	7,894
Securities available for sale, fair value	510,934	572,184
Reported Value Measurement [Member] | Other Debt Obligations [Member]
Securities held-to-maturity, amortized cost	67,315	49,974
Securities available for sale, fair value	346,720	205,052
Estimate of Fair Value Measurement [Member]
Cash and due from banks	137,026	81,723
Loans	6,720,653	6,687,125
FHLB-NY stock	50,017	35,937
Accrued interest receivable	38,811	38,698
Deposits	6,392,190	6,385,276
Borrowings	1,075,154	816,012
Accrued interest payable	5,637	4,777
Estimate of Fair Value Measurement [Member] | Interest Rate Swap [Member]
Interest Rate Swaps, Net Amount	53,985	10,683
Interest rate swaps	13,258	25,071
Estimate of Fair Value Measurement [Member] | Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, amortized cost	7,496	8,667
Securities available for sale, fair value	510,934	572,184
Estimate of Fair Value Measurement [Member] | Other Debt Obligations [Member]
Securities held-to-maturity, amortized cost	57,064	53,362
Securities available for sale, fair value	346,720	205,052
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	137,026	81,723
Accrued interest receivable	37
Deposits	5,500,634	5,438,870
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Other Debt Obligations [Member]
Securities available for sale, fair value	11,573	12,485
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
FHLB-NY stock	50,017	35,937
Accrued interest receivable	2,532	1,574
Deposits	891,556	946,406
Borrowings	1,019,802	759,540
Accrued interest payable	5,637	4,777
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Interest Rate Swaps, Net Amount	53,985	10,683
Interest rate swaps	13,258	25,071
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, amortized cost	7,496	8,667
Securities available for sale, fair value	510,934	572,184
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Other Debt Obligations [Member]
Securities available for sale, fair value	333,485	190,872
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Loans	6,720,653	6,687,125
Accrued interest receivable	36,242	37,124
Borrowings	55,352	56,472
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Other Debt Obligations [Member]
Securities held-to-maturity, amortized cost	57,064	53,362
Securities available for sale, fair value	$ 1,662	$ 1,695

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