Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013 Directors Loans
Commitments And Contingencies [Line Items]
Unfunded commitments	$ 164,300,000
Commitments expiration period	5 years
Number of loans receivable	15
Number of board of directors	8
Number of directors entitled to annual compensation	5
CT Opportunity Partners I, LP [Member]
Commitments And Contingencies [Line Items]
Maximum exposure to loss for incentive compensation	10,200,000
Pending Litigation [Member]
Commitments And Contingencies [Line Items]
Reserves recorded for pending litigation	0
Five Board of Directors [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	125,000
Three Board of Directors [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	0
Four Directors [Member]
Commitments And Contingencies [Line Items]
Percentage of compensation paid in cash	50.00%
Percentage of compensation in the form of deferred stock units	50.00%
Chairperson of Audit Committee [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	$ 12,000