Subsequent Events - Additional Information (Detail) (USD $)	9 Months Ended		0 Months Ended		0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Oct. 09, 2013 Subsequent Event [Member]	Sep. 30, 2013 Repurchase Agreements [Member] Subsequent Event [Member]	Oct. 03, 2013 Restricted Class A Common Stock [Member] Subsequent Event [Member]	Oct. 09, 2013 CT Legacy Partners [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Total loans commitments			$ 36,200,000	$ 330,800,000
Aggregate loan commitments funded				315,700,000
Borrowings under existing repurchase facilities				214,300,000
Distributions to common shareholders			36,200,000			75,000,000
Principal and interest due under secured notes			11,100,000
Management incentive awards plan	$ 1,969,000	$ 944,000				$ 4,800,000
Restricted class A common stock granted					470,593