Debt and Contingent Obligations - Schedule of Fixed Charge Coverage Ratios and Leverage Ratios (Details) - Secured Debt - Second Amended And Restated Loan And Security Agreement	Mar. 31, 2019
Maximum | December 31, 2019
Debt Instrument [Line Items]
Fixed charge coverage ratio required to meet loan covenant	1.05
Maximum | December 31, 2020, March 31, 2021, June 30, 2021, September 30, 2021, December 31, 2021 and thereafter
Debt Instrument [Line Items]
Fixed charge coverage ratio required to meet loan covenant	1.10
Maximum | December 31, 2018
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	2.90
Maximum | December 31, 2019, March 31, 2020, June 30, 2020, and September 30, 2020
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	2.40
Maximum | December 31, 2020, March 31, 2021, June 30, 2021 and September 30, 2021
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	1.70
Maximum | December 31, 2021 and each Fiscal Quarter end thereafter
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	1.50
Minimum | December 31, 2019
Debt Instrument [Line Items]
Fixed charge coverage ratio required to meet loan covenant	1.00
Minimum | December 31, 2020, March 31, 2021, June 30, 2021, September 30, 2021, December 31, 2021 and thereafter
Debt Instrument [Line Items]
Fixed charge coverage ratio required to meet loan covenant	1.00
Minimum | December 31, 2018
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	1.00
Minimum | December 31, 2019, March 31, 2020, June 30, 2020, and September 30, 2020
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	1.00
Minimum | December 31, 2020, March 31, 2021, June 30, 2021 and September 30, 2021
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	1.00
Minimum | December 31, 2021 and each Fiscal Quarter end thereafter
Debt Instrument [Line Items]
Leverage ratio required for loan covenant	1.00