Equity Investments in Unconsolidated Subsidiaries - Activity Relating to Our Equity Investments in Unconsolidated Subsidiaries (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Beginning Balance	$ 10,604,000
Distributions	(5,007,000)	$ (17,867,000)	$ (8,795,000)
Ending Balance	9,441,000	10,604,000
CT Opportunity Partners I, LP [Member]
Schedule of Equity Method Investments [Line Items]
Beginning Balance	10,604,000	22,480,000
Distributions	(5,007,000)	(17,867,000)	0
Deferred income allocation	3,844,000	5,991,000
Ending Balance	$ 9,441,000	$ 10,604,000	$ 22,480,000