Consolidated Condensed Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Held-to-maturity, fair value (in dollars)	$ 484	$ 526
Loans receivable, allowance (in dollars)	$ 28,934	$ 28,331
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common Stock, Shares, Issued	25,371,086	25,398,992
Common stock, shares outstanding	19,727,630	20,171,392
Accumulated other comprehensive income (loss), tax effect (in dollars)	$ 1,108	$ (468)
Treasury stock, shares	5,643,456	5,227,600
Preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	4,963,000	4,963,000
Preferred stock, shares issued	0	0
Cumulative Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	37,000	37,000
Preferred stock, shares issued	0	0