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Income Taxes - Changes in The Valuation Allowance (Parenthetical) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Deferred Tax Assets Valuation Allowance [Member]
Income Taxes Changes in Valuation Allowance [Abstract]
Deductions in valuation allowances due to reduction in tax rate	$ 1.8

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- Definition

Effect of Tax Cuts and Jobs Act of 2017 deductions in valuation allowances and reserves.

+ References

No definition available.

+ Details

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- Definition

Abstract stands for income taxes changes in valuation allowance.

+ References

No definition available.

+ Details

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Namespace Prefix:	capl_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Details

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Namespace Prefix:
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Balance Type:
Period Type: