Commitments and Contingencies - Future Minimum Lease Payments under Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Capital lease obligation, 2014	$ 5,903
Capital lease obligation, 2015	4,242
Capital lease obligation, 2016	2,262
Capital lease obligation, 2017	519
Capital lease obligation, 2018	110
Capital lease obligation, Thereafter
Total minimal leases payments, Capital Leases	13,036
Less: Interest	(817)
Present value of minimal lease payments	12,219
Operating lease obligation, 2014	17,582
Operating lease obligation, 2015	15,824
Operating lease obligation, 2016	12,624
Operating lease obligation, 2017	10,861
Operating lease obligation, 2018	8,115
Operating lease obligation, Thereafter	20,540
Total minimal leases payments, Operating Leases	85,546
Total lease, 2014	23,485
Total lease, 2015	20,066
Total lease, 2016	14,886
Total lease, 2017	11,380
Total lease, 2018	8,225
Total lease, Thereafter	20,540
Total minimal leases payments	$ 98,582