Debt Obligations - Balances of Each Entity's Outstanding Securitized Debt Obligations, their Respective Coupons and All-in Effective Costs, Including Amortization of Fees and Expenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Non-Recourse Securitized Debt Obligations
Principal Balance	$ 40,181
Book Value, beginning year	139,184
Book Value, ending year	40,181
Coupon	L+2.23 %
All-In Cost	L+2.23 %
Maturity Date	Jul. 31, 2039
CT CDO I [Member]
Non-Recourse Securitized Debt Obligations
Principal Balance	40,181
Book Value, beginning year	91,131
Book Value, ending year	40,181
Coupon	L+2.23 %
All-In Cost	L+2.23 %
Maturity Date	Jul. 31, 2039
GSMS 2006-FL8A [Member]
Non-Recourse Securitized Debt Obligations
Principal Balance
Book Value, beginning year	48,053
Book Value, ending year
Coupon
All-In Cost