Commitments and Contingencies (Detail) - Future Minimum Annual Cash Payments Under Non-Cancelable Operating Lease Agreements (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
2013	$ 37,820
2014	31,660
2015	22,295
2016	14,680
2017	9,910
Thereafter	75,055
Total minimum lease payments (1)	$ 191,420	[1]

[1] Excludes $2.2 million of future contractual sublease rental income.