Commitments and Contingencies - Financial Covenants Related to Amended Subordination and Guaranty Agreement (Details)  | 
Dec. 31, 2020  | 
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| Subordination Agreement And Additional Financial Covenant [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 | |
| Subordination Agreement And Additional Financial Covenant [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% | 
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- Definition Maximum consolidated total lease adjusted leverage ratio. No definition available. 
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- Definition Minimum consolidated fixed charge coverage ratio. No definition available. 
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- Definition Minimum consolidated liquidity ratio. No definition available. 
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- Definition Line items pertaining to subordination agreements and additional financial covenants. No definition available. 
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- Details 
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