| General - Additional Information (Details) | 3 Months Ended | |
|---|---|---|
| Mar. 31, 2021  USD ($)  Sites  States  $ / shares | Dec. 31, 2020  $ / shares | |
| General [Abstract] | ||
| Number of self operated sites | 1,324 | |
| Number of Sites Operated By External Operators (dealers) | 1,625 | |
| Number of states | States | 33 | |
| Common stock par value | $ / shares | $ 0.0001 | $ 0.0001 | 
| Goodwill or intangible assets | $ | $ 0 | 
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- Definition General [Abstract] No definition available. 
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- Definition Number of Self Operated Sites No definition available. 
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- Definition Number of Sites Operated By External Operators (dealers) No definition available. 
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- Definition Number of states in which business operates. No definition available. 
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- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. No definition available. 
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