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Future Minimum Lease Payments Required Under These Lease Commitments (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Capital Leased Assets [Line Items]  
Capital Leases 2017 $ 605
Capital Leases 2018 460
Capital Leases 2019 361
Capital Leases 2020 361
Capital Leases 2021 361
Capital Leases Thereafter 30
Capital Leases Total minimum lease payments 2,178
Interest (276)
Present value of net minimum lease payments 1,902
Operating Leases 2017 3,123
Operating Leases 2018 2,027
Operating Leases 2019 1,033
Operating Leases 2020 211
Operating Leases 2021 41
Operating Leases Thereafter 0
Operating Leases Total minimum lease payments $ 6,435