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Secured Credit Facility and Other Debt - Long-term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |
Oaktree Facility | $ 88,755 |
Notes payable | 88,755 | $ 98,950
Less - Current maturities of long-term debt | (2,899) | (3,978)
Less - Unamortized deferred loan costs | (6,739) | (8,812)
Long-term debt, net of current maturities | 79,117 | 86,160
Tealstone |  |
Debt Instrument [Line Items] |  |
Notes payable for transportation and construction equipment and other | 13,572 | 12,393
Notes Payable for Transportation and Construction Equipment |  |
Debt Instrument [Line Items] |  |
Notes payable | 612 | 1,557
Senior Secured Term Loans | Equipment-based Facility | Oaktree Facility |  |
Debt Instrument [Line Items] |  |
Oaktree Facility | $ 74,571 | $ 85,000

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