Long-Term Debt - Covenants (Details) $ in Millions  | 
 Mar. 31, 2021  
USD ($) 
 | 
|---|---|
| Line of Credit Facility [Line Items] | |
| Minimum Consolidated Liquidity Ratio | 115.00% | 
| Minimum Consolidated Fixed Charge Coverage Ratio | 232.00% | 
| Maximum Consolidated Total Lease Adjusted Leverage Ratio | 247.00% | 
| 2016 Credit Facilities | |
| Line of Credit Facility [Line Items] | |
| Net income and retained earnings free of restrictions | $ 290.0 | 
| Minimum EBTDAR to rent ratio | 801.00% | 
| 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% | 
| Required ratio | 2016 Credit Facilities | |
| Line of Credit Facility [Line Items] | |
| Minimum EBTDAR to rent ratio | 150.00% | 
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