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Leases - Summary of Other Information Related to Operating Leases (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Leases [Abstract]  
Cash paid for amounts included in the measurement of operating lease liabilities $ 17,250
Right-of-use assets obtained in exchange for new operating lease liabilities $ 26,277
Weighted-average remaining lease term - operating leases 57 months
Weighted-average discount rate - operating leases 4.40%