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Related Party Transactions (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 26, 2016 | Mar. 31, 2017 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Property, Plant and Equipment, Net |  |  | $ 422,034 |  | $ 422,034 |  | $ 469,646
Conversion ratio, preferred stock to common stock | 1 |  |  |  |  |  |
Percentage retained under tax receivable agreement | 15.00% |  |  |  |  |  |
Estimated termination payment |  |  | $ 55,100 |  | $ 55,100 |  |
Discount rate, tax receivable agreement liability |  |  | 5.91% |  | 5.91% |  |
Buildings and improvements |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Estimated remaining useful life |  |  |  |  | 39 years |  |
Affiliated Entity |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Rent expense |  |  | $ 1,700 | $ 1,700 | $ 3,900 | $ 3,500 |
Affiliated Entity | Western Airways |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Net charter expense |  |  |  | $ 700 |  | $ 600 |
Proceeds from sale of aircraft |  | $ 1,300 |  |  |  |  |
Gain on sale of asset |  | $ 1,300 |  |  |  |  |
Affiliated Entity | Mosing Holdings |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Percentage of tax benefits realized payable | 85.00% |  |  |  |  |  |
Cumulative deficit, period |  |  |  |  | 36 months |  |
Tax receivable agreement, estimated liability |  |  | 6,200 |  | $ 6,200 |  |
Affiliated Entity | Buildings and improvements |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Estimated remaining useful life |  |  |  |  | 37 years |  |
Property, Plant and Equipment, Net |  |  | 58,400 |  | $ 58,400 |  |
Affiliated Entity | Leasehold improvements and land improvements |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Estimated remaining useful life |  |  |  |  | 10 years |  |
Property, Plant and Equipment, Net |  |  | $ 17,600 |  | $ 17,600 |  |

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