Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Stockholder's equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	49,000,000	49,000,000
Common stock, issued shares	27,157,188	27,157,188
Common stock, outstanding shares	27,157,188	27,157,188