Commitments and Contingencies - Summary of Approximate Aggregate Minimum Future Payments Required for Operating Leases (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Expenses related to non-cancellable contractual obligations	$ 10,600,000	$ 10,600,000
Remaining 2014	29,125,000
2015	38,234,000
2016	36,924,000
2017	34,976,000
2018	31,528,000
Thereafter	53,215,000
Total	$ 224,002,000