Acquisitions (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2013 item	Mar. 31, 2014 Retail propane item	Mar. 31, 2014 Retail propane and liquids	Mar. 31, 2014 Natural gas liquids terminals item
Acquisitions
Number of business combination agreements	2	4		4
Cash paid	$ 14,000		$ 21,900

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration