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Commitments - Schedule of Minimum Lease and Purchase Commitments Under Noncancelable Arrangements (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2017 $ 4,835
2018 3,892
2019 2,109
2020 257
2021 235
2022 and thereafter 647
Total minimum lease and purchase commitments $ 11,975