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Commitments and Contingencies - Future Lease Commitments (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012
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Lease, 2013 | $ 4,680
Lease, 2014 | 4,180
Lease, 2015 | 3,535
Lease, 2016 | 2,540
Lease, 2017 | 354
Lease, 2018 and Thereafter | 365
Lease, total | 15,654
Sublease, 2013 | (2,182)
Sublease, 2014 | (2,152)
Sublease, 2015 | (2,108)
Sublease, 2016 | (2,053)
Sublease, 2017 |
Sublease, 2018 and Thereafter |
Sublease, total | (8,495)
Net Commitment, 2013 | 2,498
Net Commitment, 2014 | 2,028
Net Commitment, 2015 | 1,427
Net Commitment, 2016 | 487
Net Commitment, 2017 | 354
Net Commitment, 2018 and Thereafter | 365
Net Commitment, total | $ 7,159

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