BUSINESS SEGMENTS - Narrative (Details)	9 Months Ended
Sep. 30, 2016 terminal segment propane_storage
Segment information
Number of business segments \| segment	3
Domestic Pipelines & Terminals
Segment information
Number of Terminals Operated	5
Number of underground propane storage caverns \| propane_storage	2
Global Marine Terminals
Segment information
Number of Terminals Owned	7
Merchant Services
Segment information
Number of Terminals Owned	5

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration