Consolidated Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Corporate investments at fair value	$ 67,596	$ 0
Class A Units
Common stock, par value (in USD per share)	$ 0	$ 0
Common stock, shares authorized	Unlimited	Unlimited
Common stock, shares issued	38,472,506	30,180,933
Common stock, shares outstanding	38,472,506	30,180,933
Class B Units
Common stock, par value (in USD per share)	$ 0	$ 0
Common stock, shares authorized	Unlimited	Unlimited
Common stock, shares issued	112,584,211	120,267,503
Common stock, shares outstanding	112,584,211	120,267,503