CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	25,000,000	25,000,000	25,000,000
Common stock, shares issued	15,437,531	10,329,934	13,661,648
Common stock, shares outstanding	15,437,531	10,329,934	13,661,648
Accumulated other comprehensive income, tax (in dollars)	$ 1,095	$ 278	$ 772