Annual report pursuant to Section 13 and 15(d)

Leases - Schedule of Maturities of Capital Leases (Details)

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Leases - Schedule of Maturities of Capital Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Capital Leases, Future Minimum Payments Due    
Capital leases, payments due in 2018 $ 3,521  
Capital leases, payments due in 2019 3,029  
Capital leases, payments due in 2020 2,440  
Capital leases, payments due in 2021 1,586  
Capital leases, payments due in 2022 410  
Capital leases, payments due thereafter 441  
Total minimum capital lease commitments 11,427  
Less: Amounts representing interest 242  
Net capital liability 11,185  
Current 3,399 $ 3,025
Long-term $ 7,786 $ 7,216