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Future Payments Due (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Schedule Of Future Minimum Sublease Rentals [Line Items]  
Future Payments Due, Capital Lease, 2013 $ 3,187
Future Payments Due, Capital Lease, 2014 3,187
Future Payments Due, Capital Lease, 2015 3,187
Future Payments Due, Capital Lease, 2016 3,195
Future Payments Due, Capital Lease, 2017 3,187
Future Payments Due, Capital Lease, 2018 and thereafter 11,689
Future Payments Due, Capital Lease, Total 27,632
Less: Imputed interest (4,218)
Net capital lease liability 23,414
Future Payments Due, Operating Leases and Other Commitments, 2013 30,716
Future Payments Due, Operating Leases and Other Commitments, 2014 10,636
Future Payments Due, Operating Leases and Other Commitments, 2015 8,314
Future Payments Due, Operating Leases and Other Commitments, 2016 6,611
Future Payments Due, Operating Leases and Other Commitments, 2017 5,375
Future Payments Due, Operating Leases and Other Commitments, 2018 and thereafter 11,074
Future Payments Due, Operating Leases and Other Commitments, Total 72,726
Future Payments Due, Total Leases, 2013 33,903
Future Payments Due, Total Leases, 2014 13,823
Future Payments Due, Total Leases, 2015 11,501
Future Payments Due, Total Leases, 2016 9,806
Future Payments Due, Total Leases, 2017 8,562
Future Payments Due, Total Leases, 2018 and thereafter 22,763
Future Payments Due, Leases, Total $ 100,358