Cash and Cash Equivalents, Including Restricted Cash - Schedule of Cash and Cash Equivalents, Including Restricted Cash Balances (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Credit Rating [Line Items]
Cash and cash equivalents	$ 70,834	$ 52,342	$ 15,361	$ 15,423
Restricted cash	10,677	10,096
Total	81,511	62,438
Bank of America [Member] | A-1 Credit Rating [Member]
Credit Rating [Line Items]
Cash and cash equivalents	70,834	52,342
Restricted cash	$ 10,677	$ 10,096