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Leases - Components of Lease Cost and Other Lease (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lease cost:
Operating lease cost	$ 3,704	$ 11,311
Short-term lease cost	397	1,612
Variable lease cost	372	967
Total lease cost	4,473	13,890
Other information:
Cash paid for amounts included in the measurement of operating lease liabilities	3,854	11,743
ROU assets obtained in exchange for new operating lease liabilities	$ 0	$ 5,016
Weighted-average remaining lease term in years – operating leases	10 years 2 months 12 days	10 years 2 months 12 days
Weighted-average discount rate – operating leases	6.00%	6.00%

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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