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Leases - Schedule of Maturity of Operating Lease Liabilities (Detail)
$ in Thousands
Sep. 30, 2019
USD ($)
Leases [Abstract]  
2019 $ 8,965
2020 34,067
2021 31,135
2022 25,068
2023 23,342
Thereafter 84,910
Total undiscounted lease payments 207,487
Less: imputed interest (38,178)
Total lease liabilities $ 169,309