Long-Term Debt - Recorded Expenses with Respect to Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Debt Disclosure [Abstract]
Interest expense	$ 19,173		$ 688		$ 21,366		$ 1,134
Amortization of debt issuance cost	2,007	[1]	103	[1]	2,479	[1]	152	[1]
Commitment fee	267	[1]	390	[1]	9,204	[1]	390	[1]
Total	$ 21,447		$ 1,181		$ 33,049		$ 1,676

[1] Included in Other expense.