Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Selected Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held-to-maturity	$ 71,700	$ 72,923
Securities available for sale	1,677,854	954,164
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	27,488	20,508
Interest rate swaps	37,710	28,401
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and due from banks	267,643	172,157
Loans	6,818,328	6,906,950
FHLB-NY stock	32,745	31,066
Accrued interest receivable	64,369	59,018
Deposits	7,572,395	6,815,261
Borrowed Funds	846,123	841,281
Accrued interest payable	16,805	12,111
Reported Value Measurement [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	50,303	69,013
Interest rate swaps		28,401
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	7,841	7,855
Securities available for sale	926,731	354,344
Reported Value Measurement [Member] | Total Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held-to-maturity	64,945	66,155
Securities available for sale	687,518	520,409
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and due from banks	267,643	172,157
Loans	6,416,360	6,512,841
FHLB-NY stock	32,745	31,066
Accrued interest receivable	64,369	59,018
Deposits	7,553,063	6,778,657
Borrowed Funds	821,396	801,156
Accrued interest payable	16,805	12,111
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	50,303	69,013
Interest rate swaps	37,710	28,401
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	7,243	7,058
Securities available for sale	926,731	354,344
Estimate of Fair Value Measurement [Member] | Total Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held-to-maturity	56,709	58,697
Securities available for sale	687,518	520,409
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	267,643	172,157
Deposits	4,696,909	4,503,971
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Total Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	12,168	11,660
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	32,745	31,066
Accrued interest receivable	64,369	59,018
Deposits	2,856,154	2,274,686
Borrowed Funds	773,473	753,306
Accrued interest payable	16,805	12,111
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	50,303	69,013
Interest rate swaps	37,710	28,401
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	7,243	7,058
Securities available for sale	926,731	354,344
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Total Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	673,911	507,312
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	6,416,360	6,512,841
Borrowed Funds	47,923	47,850
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Total Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held-to-maturity	56,709	58,697
Securities available for sale	$ 1,439	$ 1,437