Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Stockholders' Equity:
Treasury stock, shares	103,991	103,991
Common Stock | Voting common stock
Stockholders' Equity:
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
Stockholders' Equity:
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
Preferred stock
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0