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Leases - Schedule of Maturity of Operating Lease Commitments (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 34,256
2020 30,419
2021 26,172
2022 20,358
2023 18,981
Thereafter 65,854
Total future minimum rental commitments $ 196,040