Commitments and Contingencies (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jul. 31, 2007	Jun. 30, 2007	Dec. 31, 2023	Dec. 31, 2022
Loans and Leases Receivable, Commitments, Fixed Rates			$ 8,100
Loans and Leases Receivable, Commitments, Weighted Average Rate of Interest			7.40%
Loans and Leases Receivable, Commitments, Variable Rates			$ 479,200
Loans and Leases Receivable, Commitments, Variable Rates, Weighted Average Rate			8.17%
Loan Commitments, Expiration			90 days
Line of Credit, Maturity, Max			18 months
Purchase obligations			$ 12,548	$ 18,900
Third-Party Vendors [Member]
Purchase obligations			$ 6,500	6,200
Home Equity Line of Credit [Member]
Line of Credit, Maturity, Max			10 years
Letter of Credit Pledged as Collateral [Member]
Deposit Liabilities, Collateral Issued, Financial Instruments			$ 1,118,700	$ 1,073,700
Capital Securities | Flushing Financial's Capital Trusts [Member]
Proceeds from Issuance of Debt	$ 61,900	$ 61,900