Fair Values - Assets that are Recorded at Fair Value (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013 CT CDO I [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan loss reserve held by CT CDO I/securitization vehicles	92.00%	100.00%