Commitments and Contingencies - Schedule of Minimum Future Obligations Under All Non-Cancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Loss Contingencies [Line Items]
2013	$ 10,699
2014	7,336
2015	3,788
2016	2,501
2017	2,074
Thereafter	5,099
Total minimum lease payments	$ 31,497