Loans Receivable - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013 SecurityLoan	Dec. 31, 2012 SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	$ 2,047,223,000	$ 141,500,000
Unfunded commitments	164,300,000
Number of loans receivable	15
Commitments expiration period	5 years
Net book value of loans in maturity default	27,000,000
Number of loans in maturity default	1
Reserve for loan losses	0
Income on impaired loans	0
Loan Origination [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	2,000,223,000
CT Legacy Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	47,000,000
CT CDO I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Income on impaired loans		290,000
Average net book value		2,800,000
Subordinate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	246,894,000	79,000,000
Loss reserves on loans	100.00%	92.00%
Number of Loans	5	6
Net book value of loans		2,000,000
Subordinate Loans [Member] | Mortgage Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		2
Subordinate Loans [Member] | Nonaccrual Status [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate principal balance	10,500,000	24,700,000
Number of subordinate interests in mortgages on nonaccrual status	1	3
Aggregate net book value	0	2,000,000
Number of days past due for recognizing interest on loans as non accrued	90 days
Subordinate Loans [Member] | Delinquent [Member] | Interest Payments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross book value		7,500,000
Subordinate Loans [Member] | Delinquent [Member] | Contractual Payments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross book value	$ 10,500,000	$ 17,100,000