Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Detail)

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Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 19,649
2020 19,287
2021 16,833
2022 12,368
2023 8,805
Thereafter 10,452
Operating Leases, Future Minimum Payments Due, Total $ 87,394