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Monetary value of the issuance of new units of limited partnership interest in a public offering, net of offering costs. This is a parenthetical disclosure.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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No definition available.

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Subsequent Events (Details) $ in Millions		1 Months Ended	12 Months Ended
Subsequent Events (Details) $ in Millions	Oct. 12, 2016 USD ($) property location	Nov. 07, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Oct. 04, 2016 USD ($)
Subsequent Event [Line Items]
Business acquisition total purchase price			$ 24.6
Subsequent Event [Member] \| Denny Oil Company [Member]
Subsequent Event [Line Items]
Business acquisition total purchase price	$ 54.6
Number of company-operated locations \| location	6
Number of dealer-operated locations \| location	6
Number of fee properties \| property	13
Subsequent Event [Member] \| Common Units [Member]
Subsequent Event [Line Items]
Sale of units, amount authorized				$ 400.0
Sale of units (in shares) \| shares		225,834
Net proceeds from sale of units		$ 6.5