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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 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Components of lease expense:    
Operating lease cost $ 1,907 $ 3,754
Short-term lease cost 550 1,255
Other cost 14 33
Total lease cost $ 2,471 5,042
Supplemental cash flow information related to leases:    
Operating cash flows from operating leases   3,928
Operating cash flows from finance leases   8
Financing cash flows from finance leases   44
Cash paid for amounts included in the measurement of lease liabilities   3,980
Right-of-use assets obtained in exchange for new operating lease liabilities   $ 1,276
Other lease-related information:    
Weighted-average remaining lease term - operating leases (in years) 4 years 3 months 18 days 4 years 3 months 18 days
Weighted-average remaining lease term - finance leases (in years) 4 years 3 months 18 days 4 years 3 months 18 days
Weighted-average discount rate - operating leases 8.96% 8.96%
Weighted-average discount rate - finance leases 8.94% 8.94%