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Schedule of Minimum Lease Payments Under Non-Cancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Leases Future Minimum Payments [Line Items]
2013	$ 33,888
2014	30,558
2015	22,279
2016	14,927
2017	10,645
Thereafter	66,080
Total	$ 178,377

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