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Leases - Additional information (Detail)
3 Months Ended
Mar. 31, 2019
USD ($)
Lessee, Finance Lease, Option to Extend options to extend the leases for up to 10 years
Lessee, Finance Lease, Option to Terminate options to terminate the leases within one year
Capital Leased Assets, Gross $ 0.6
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation $ 0.2
Maximum [Member]  
Finance Lease Remaining Lease Term 5 years
Minimum [Member]  
Finance Lease Remaining Lease Term 1 month