Cash and Cash Equivalents, Including Restricted Cash - Schedule of Cash and Cash Equivalents, Including Restricted Cash Balances (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Credit Rating [Line Items]
Cash and cash equivalents	$ 52,342	$ 15,423	$ 34,818	$ 24,449
Restricted cash	10,096	14,246
Total	62,438	29,669
Bank of America [Member] | A-1 Credit Rating [Member]
Credit Rating [Line Items]
Cash and cash equivalents	52,342	15,423
Restricted cash	$ 10,096	$ 14,246