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Commitments and Contingencies (Future Minimum Lease Payments) (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Commitments and Contingencies [Abstract]  
2017 $ 26,820
2018 21,528
2019 17,238
2020 14,850
2021 12,280
Thereafter 69,436
Total $ 162,152