Consolidated Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Held-to-maturity, fair value (in dollars)	$ 308	$ 393
Loans receivable, allowance (in dollars)	24,766	24,950
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	12,735,313	12,735,313
Common stock, shares outstanding	9,234,534	9,719,521
Accumulated other comprehensive income, tax effect (in dollars)	$ 2,214	$ 294
Treasury stock, shares	3,500,779	3,015,792
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