Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Schedule of Future Depreciation and Amortization (Detail)

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Property and Equipment - Schedule of Future Depreciation and Amortization (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Property Plant And Equipment [Abstract]  
2018 $ 6,100
2019 5,273
2020 3,831
2021 2,988
2022 2,376
Thereafter 12,018
Future depreciation and amortization expense $ 32,586