Leases - Summary of Minimum Future Capital and Operating Leases Payments (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 2,151
Capital Leases, Future Minimum Payments Due, Next Twelve Months	563
Operating Leases, Future Minimum Payments, Due in Two Years	2,053
Capital Leases, Future Minimum Payments Due in Two Years	563
Operating Leases, Future Minimum Payments, Due in Three Years	1,654
Capital Leases, Future Minimum Payments Due in Three Years	563
Operating Leases, Future Minimum Payments, Due in Four Years	177
Capital Leases, Future Minimum Payments Due in Four Years	563
Operating Leases, Future Minimum Payments, Due in Five Years	35
Capital Leases, Future Minimum Payments Due in Five Years	563
Operating Leases, Future Minimum Payments, Due Thereafter	0
Capital Leases, Future Minimum Payments Due Thereafter	4,918
Operating Leases, Future Minimum Payments Due	6,070
Capital Leases, Future Minimum Payments Due	$ 7,733