Revolving Credit Facility and Long-Term Debt - Financial Covenants (Details) |
12 Months Ended |
---|---|
Dec. 31, 2017
USD ($)
quarter
| |
Debt Instrument [Line Items] | |
Number of consecutive quarters for EBITDA to fixed charges ratio covenants | quarter | 4 |
Credit Agreement | |
Debt Instrument [Line Items] | |
Consolidated EBITDA | $ 1.25 |
Consolidated Net Income | 0 |
Facility Capital Expenditures | $ 30,000,000 |
July 1, 2017 through December 31, 2017 | Credit Agreement | |
Debt Instrument [Line Items] | |
Consolidated Total Leverage Ratio | 3.75 |
January 1, 2018 through March 31, 2018 | Credit Agreement | |
Debt Instrument [Line Items] | |
Consolidated Total Leverage Ratio | 3.5 |
April 1, 2018 and thereafter | Credit Agreement | |
Debt Instrument [Line Items] | |
Consolidated Total Leverage Ratio | 3.25 |