Summary of Significant Accounting Policies (Revenue Recognition) (Details) - Refined products terminals and storage	6 Months Ended
Jun. 30, 2016
Minimum
Revenue Recognition
Initial term before evergreen provisions	6 months
Maximum
Revenue Recognition
Initial term before evergreen provisions	2 years

Related to revenue recognition, the initial term before evergreen provisions.

No definition available.

Name:	jpep_RevenueRecognitionInitialTermBeforeEvergreenProvisions
Namespace Prefix:	jpep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration