Consolidated Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Allowance for loan losses (in dollars)	$ 7,671	$ 8,465
Treasury stock, shares	103,991	103,991
Common Stock | Voting common stock
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	21,509,179	21,509,179
Common stock, shares outstanding	21,405,188	21,405,188
Common Stock | Non-voting common stock
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	7,671,520	7,671,520
Common stock, shares outstanding	7,671,520	7,671,520