Related Parties - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012 Gold Hill 08 Funds [Member] [Member]	Dec. 31, 2012 Gold Hill 08 Funds [Member]	Dec. 31, 2013 Gold Hill 08 Funds [Member]	Dec. 31, 2013 Beneficial Owner Lower Limit	Dec. 31, 2013 Gold Hill Capital Twenty Zero Eight LLC [Member]
Related Party Transaction [Line Items]
Line of Credit Facility, Interest Rate at Period End				national Prime plus one percent
Line of Credit Facility, Maximum Borrowing Capacity			$ 65		$ 65
Line of credit facility amount syndicated to another lender					16
Company Direct and Indirect Ownership in Limited Partnership							83.80%
Revolving line of credit facility, outstanding amount	23	31
Percentage of equity securities						10.00%
Highest Loan Amount Oustanding To Related Party During Period	$ 38