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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Oct. 31, 2018 | Aug. 31, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |  |
Amount outstanding | $ 253,873 |  |  | $ 202,168
Less - current maturities | 26,890 |  |  | 22,375
Less - deferred financing fees | 7,821 |  |  | 6,556
Long-term debt | 219,162 |  |  | 173,237
Capital leases |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount outstanding | 33,363 |  |  | 35,013
Capital leases, future interest payments | $ 25,305 |  |  |
Variable rate term loan payable in semi-annual installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 5.047% |  |  |
Amount outstanding | $ 936 |  |  | 1,220
Variable rate term loan payable in semi-annual installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 4.797% |  |  |
Amount outstanding | $ 7,426 |  |  | 8,295
Variable rate term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount outstanding | $ 0 |  |  | 8,757
Term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.25% |  |  |
Amount outstanding | $ 1,464 |  |  | 2,218
Term loan payable in monthly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 6.11% |  |  |
Amount outstanding | $ 3,843 |  |  | 4,551
Variable rate term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 6.297% |  |  |
Amount outstanding | $ 30,674 |  |  | 32,711
Variable rate term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 5.297% |  |  |
Amount outstanding | $ 17,208 |  |  | 18,346
Term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.95% |  |  |
Amount outstanding | $ 3,925 |  |  | 4,605
Term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.00% |  |  |
Amount outstanding | $ 3,945 |  |  | 4,258
Term loan payable in monthly installments(3) | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.50% |  |  |
Amount outstanding | $ 22,081 |  |  | 13,325
Construction loan, additional commitment available to be drawn upon | $ 2,742 |  |  |
Term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.61% |  |  |
Amount outstanding | $ 2,735 |  |  | 3,128
Variable rate term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 5.247% |  |  |
Amount outstanding | $ 12,915 |  |  | 14,034
Variable rate term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 10.297% |  |  |
Amount outstanding | $ 21,475 |  |  | 0
Term loan payable in quarterly installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 5.15% |  |  |
Stated interest rate |  |  | 5.15% |
Amount outstanding | $ 30,069 |  |  | 0
Variable rate term loan payable in semi-annual installments | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 4.847% |  |  |
Amount outstanding | $ 9,668 |  |  | 0
Variable rate construction loan payable | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount outstanding | $ 0 |  |  | 1,721
Variable Rate Term Loan Due In September 2029 | Term loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 5.02% | 2.50% |  |
Amount outstanding | $ 9,072 |  |  | 0
Senior secured credit facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate | 4.71% |  |  |
Amount outstanding | $ 43,074 |  |  | $ 49,986

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