Commitments and Contingencies - Schedule of Future Minimum Rental Payment for Operating Leases and Capital Leases (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Minimum Rental Commitments Capital - 2015	$ 2,594
Minimum Rental Commitments Capital - 2016	2,288
Minimum Rental Commitments Capital - 2017	8,375
Minimum Rental Commitments Capital - 2018	31
Minimum Rental Commitments Capital - 2019	26
Minimum Rental Commitments Capital - Thereafter	0
Total minimum lease payments - Capital	13,314
Less amount representing interest	1,299
Present value of capital lease commitments	12,015
Minimum Rental Commitments Operating - 2015	77,216
Minimum Rental Commitments Operating - 2016	75,604
Minimum Rental Commitments Operating - 2017	70,406
Minimum Rental Commitments Operating - 2018	64,922
Minimum Rental Commitments Operating - 2019	61,199
Minimum Rental Commitments Operating - Thereafter	591,342
Total minimum lease payments - Operating	940,689
Less sublease proceeds	76,610
Net lease payments	$ 864,079