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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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