Consolidated Statements of Financial Condition (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities held-to-maturity, fair value	$ 62,029	$ 63,529
Securities held-to-maturity, allowance for credit losses	$ 862	$ 907
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	34,087,623	34,087,623
Common stock, shares outstanding (in shares)	30,526,353	30,775,854
Treasury stock, at average cost (in shares)	3,561,270	3,311,769
Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, assets pledged	$ 5,643	$ 5,853
Securities held-to-maturity, fair value	8,667	8,991
Securities available for sale, pledged as collateral	212,388	264,968
Securities available for sale, fair value option	388	505
Other Debt Obligations [Member]
Securities held-to-maturity, assets pledged	0	0
Securities held-to-maturity, fair value	53,362	54,538
Securities held-to-maturity, allowance for credit losses	862	907
Securities available for sale, pledged as collateral	0	6,453
Securities available for sale, fair value option	$ 14,180	$ 13,998