Consolidated Condensed Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Held-to-maturity, fair value (in dollars)	[1]	$ 193	$ 245
Loans receivable, allowance (in dollars)		$ 25,923	$ 25,382
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Common stock, shares authorized		25,000,000	25,000,000
Common stock, shares issued		12,720,347	12,721,959
Common stock, shares outstanding		8,980,366	9,102,831
Accumulated other comprehensive income, tax effect (in dollars)		$ 2,675	$ 1,950
Treasury stock, shares		3,739,981	3,619,128
Preferred Stock [Member]
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 [Member]
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

[1] FHLMC, FNMA, and GNMA certificates are residential mortgage-backed securities.