Equity Investments in Unconsolidated Subsidiaries - Activity Relating to Our Equity Investments in Unconsolidated Subsidiaries (Parenthetical) (Detail) (CT Opportunity Partners I, LP [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
CT Opportunity Partners I, LP [Member]
Investments in Equity Accounted Investees [Line Items]
Advance distribution of incentive compensation	$ 1.4