Investment in CT Legacy Asset, at Fair Value - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Net investment in CT Legacy Asset		$ 132,000,000
Beneficial ownership of CT Legacy Partners	52.00%
Percentage of class B common stock dividends payable to holders	25.00%
Aggregate cash distributions to all other classes of stock	50,000,000
Cumulative preferred stock distributions, amount	$ 1,000,000
Cumulative preferred stock distributions, percent of assets	2.50%
Common stock, shares outstanding	28,802,000	2,927,000
Common Class A-1 [Member]
Equity interest in subsidiary, number of shares	4,393,750
Common stock, shares outstanding	4,400,000
Common Class A-2 [Member]
Equity interest in subsidiary, number of shares	775,000
Common stock, shares outstanding	5,600,000
Common Class B [Member]
Equity interest in subsidiary, number of shares	118,651
Common stock, shares outstanding	1,500,000
Former Lenders Under Credit Facility [Member]
Beneficial ownership of CT Legacy Partners	48.00%