Equity Investments in Unconsolidated Subsidiaries - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Jan. 31, 2011
Schedule of Equity Method Investments [Line Items]
Advance distribution of incentive compensation	$ 10.2
Book value of net investment in CTOPI carried interest	(10.2)
CT Opportunity Partners I, LP [Member]
Schedule of Equity Method Investments [Line Items]
Incentive compensation, percentage of funds profit	17.70%
Preferred return	9.00%
Return of capital to partners	100.00%
Incentive compensation	33.6
Maximum exposure to loss from equity investment	$ 10.2
Percentage of incentive management fee pool for employees		45.00%
Percentage of granted incentive compensation to employees	96.00%
Percentage of grants vesting schedule	65.00%
Percentage of grants vesting upon receipt of dividends	35.00%
Description of incentive management fee grants to employees vesting schedule	(i) one-third on the date of grant; (ii) one-third on September 13, 2012; and (iii) the remainder is contingent on continued employment with an affiliate of our Manager and upon our receipt of incentive management fees from CTOPI. Of the remaining 35% of these grants, 31% are fully vested as a result of an acceleration event, and 4% vest solely upon our receipt of incentive management fees from CTOPI or the disposition of certain investments owned by CTOPI.
CT Opportunity Partners I, LP [Member] | Acceleration Event [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of grants vesting upon receipt of dividends	31.00%
CT Opportunity Partners I, LP [Member] | Incentive Management Fees [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of grants vesting upon receipt of dividends	4.00%