Transactions with Related Parties - Additional Information (Detail) (USD $)			0 Months Ended	9 Months Ended			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Oct. 03, 2013 Manager [Member]	Sep. 30, 2014 Manager [Member]	Oct. 03, 2013 Manager [Member]	Jun. 20, 2014 CT Legacy Portfolio [Member]	Sep. 30, 2014 Affiliate of Manager [Member]	Sep. 30, 2014 Affiliate of our Manager [Member]	Sep. 30, 2014 Affiliate of our Manager [Member] Third-Party Service Provider [Member]	Sep. 30, 2014 Affiliate of our Manager [Member] CT CDO I [Member]	Sep. 30, 2014 Affiliate of our Manager [Member] Equity Capital Markets Data Services [Member]
Related Party Transaction [Line Items]
Accrued management fees payable							$ 5,400,000
Management fees paid to Manager							10,300,000
Expense reimbursements to Manager							50,000
Preferred distributions payable to affiliate of our Manager								151,000
Payments of preferred distributions to affiliate of our Manager								1,700,000
Expenses reimbursed to managers							90,000
Issuance of restricted class A common stock			339,431
Fair value of restricted class A common stock	572,000	288,000			8,500,000
Vesting period of restricted class A common stock			3 years
Non-cash expense				2,400,000
Special servicing fees										139,000
Special servicing fees payable										393,000
Service fees paid to third-party service provider											26,000
Acquired service provider, date									Aug. 06, 2014
Administrative services fees incurred									50,000
Aggregate principal balance of loans						35,000,000
Aggregate book value of loans						$ 27,000,000