Loans Receivable - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014 Loans SecurityLoan	Dec. 31, 2013 SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	$ 2,710,159,000	$ 2,047,223,000
Unfunded commitments	316,400,000
Number of loans receivable	23
Commitments expiration period	5 years
Net book value of loans in maturity default	27,000,000	27,000,000
Number of loans in maturity default	1	1
Reserve for loan losses	0	0
Loan Origination [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	2,663,159,000	2,000,223,000
CT Legacy Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	47,000,000	47,000,000
Subordinate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book value, net	248,327,000	246,894,000
Loss reserves on loans	100.00%	100.00%
Number of Loans	5	5
Subordinate Loans [Member] | Mortgage Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	1	1
Subordinate Loans [Member] | Nonaccrual Status [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate principal balance	37,500,000	10,500,000
Number of subordinate interests in mortgages on nonaccrual status	2	1
Aggregate net book value	27,000,000	0
Number of days past due for recognizing interest on loans as non accrued	90 days	90 days
Material interest receivable	0	0
Subordinate Loans [Member] | Delinquent [Member] | Contractual Payments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross book value	$ 10,500,000	$ 10,500,000