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Deferred Revenue - Additional Information (Detail) - Store	Dec. 31, 2018	Dec. 31, 2017
am/pm [member]
Summary of deferred revenue [line items]
Number of stores	2,493	2,414
Jet Oil [member]
Summary of deferred revenue [line items]
Number of stores	1,772	1,735

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- Definition

Number Of Stores1

+ References

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+ Details

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Period Type:	instant

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- Definition

Summary of deferred revenue.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: