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v3.21.2

Segment Reporting - Additional Information (Details) - $ / gal | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Segment Reporting [Abstract] |  |
Fixed margin | 5.0 | 4.5

X
- Definition Fixed margin. + References No definition available. + Details
Name: | arko_FixedMargin
Namespace Prefix: | arko_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration