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Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Future Minimum Lease Payments Under Capital Leases And Operating Leases For Continuing Operations [Line Items]
2013	$ 20,960
2014	16,268
2015	12,052
2016	8,337
2017	5,420
Thereafter	10,915
Total	$ 73,952

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