Long-Term Debt - Financial Covenants Include Required Specified Ratios (Details)	Dec. 31, 2020
Line of Credit Facility [Line Items]
Minimum Consolidated Liquidity Ratio	118.00%
Minimum Consolidated Fixed Charge Coverage Ratio	207.00%
Maximum Consolidated Total Lease Adjusted Leverage Ratio	278.00%
Required ratio
Line of Credit Facility [Line Items]
Minimum Consolidated Liquidity Ratio	105.00%
Minimum Consolidated Fixed Charge Coverage Ratio	120.00%
Maximum Consolidated Total Lease Adjusted Leverage Ratio	575.00%