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Adoption of ASC 842 - Summary of Components of Lease Expense, Supplemental Cash Flow Information Related to Leases and Other Lease-related Information (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Components of lease expense:    
Operating lease cost $ 1,637 $ 5,391
Short-term lease cost 668 1,923
Other cost 16 49
Total lease cost $ 2,321 7,363
Supplemental cash flow information related to leases:    
Operating cash flows from operating leases   5,757
Operating cash flows from finance leases   12
Financing cash flows from finance leases   53
Cash paid for amounts included in the measurement of lease liabilities   5,822
Right-of-use assets obtained in exchange for new operating lease liabilities   $ 5,070
Other lease-related information:    
Weighted-average remaining lease term - operating leases (in years) 4 years 6 months 4 years 6 months
Weighted-average remaining lease term - finance leases (in years) 4 years 4 years
Weighted-average discount rate - operating leases 8.81% 8.81%
Weighted-average discount rate - finance leases 8.94% 8.94%