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Leases - Schedule of Future Minimum Rental Payments for Operating Leases (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 16,354
2020 12,469
2021 10,177
2022 8,523
2023 6,809
Thereafter 14,267
Future minimum lease payments $ 68,599