Equity Investments in Unconsolidated Subsidiaries - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2011
Schedule of Equity Method Investments [Line Items]
Promote income recognized	$ 5,007,000	$ 17,867,000	$ 8,795,000
CT Opportunity Partners I, LP [Member]
Schedule of Equity Method Investments [Line Items]
Carried interest revenue, percentage of fund's profit	17.70%
Preferred return	9.00%
Return of capital to partners	100.00%
Carried interest revenue	$ 9,400,000
Promote income recognized	$ 5,007,000	17,867,000	0
Percentage of carried interest distributions pool for employees				45.00%
Percentage of pool vested	68.00%
Fully vested pool, percentage	32.00%
Description of incentive management fee grants to employees vesting schedule	Approximately 68% of the pool is two-thirds vested as of December 31, 2015, with the remainder contingent on continued employment with an affiliate of our Manager and upon our receipt of promote distributions from CTOPI. The remaining 32% of the pool is fully vested as a result of an acceleration event. During the year ended December 31, 2015, we accrued $2.6 million under the CTOPI incentive plan compared to $11.2 million for the year ended December 31, 2014 and [$2.8 million] for the year ended December 31, 2013, which amounts were recognized as a component of general and administrative expenses in our consolidated statement of operations.
CT Opportunity Partners I, LP [Member] | CTOPI Incentive Plan [Member]
Schedule of Equity Method Investments [Line Items]
Accrued expenses for incentive plan	$ 5,400,000	$ 12,900,000	$ 0