Acquisitions (Details 9) (USD $)		12 Months Ended											12 Months Ended				12 Months Ended					12 Months Ended																			0 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Vehicles Minimum	Mar. 31, 2012 Vehicles Minimum	Mar. 31, 2013 Vehicles Maximum	Mar. 31, 2012 Vehicles Maximum	Mar. 31, 2012 Buildings Minimum	Mar. 31, 2013 Common units	Mar. 31, 2012 Common units	Mar. 31, 2012 Pacer	Mar. 31, 2013 Pacer	Jan. 03, 2012 Pacer item	Mar. 31, 2013 Pacer Trade names	Mar. 31, 2013 Pacer Customer relationships	Mar. 31, 2013 Pacer Non-compete agreements	Mar. 31, 2013 Pacer Land	Mar. 31, 2013 Pacer Tanks and other retail propane equipment	Mar. 31, 2013 Pacer Tanks and other retail propane equipment Minimum	Mar. 31, 2013 Pacer Tanks and other retail propane equipment Maximum	Mar. 31, 2013 Pacer Vehicles	Mar. 31, 2013 Pacer Buildings	Mar. 31, 2013 Pacer Other	Mar. 31, 2013 Pacer Other Minimum	Mar. 31, 2013 Pacer Other Maximum	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Trade names	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Customer relationships	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Land	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Tanks and other retail propane equipment	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Vehicles	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Buildings	Mar. 31, 2012 Pacer Estimated Allocation as of March 31, 2012 Other	Mar. 31, 2013 Pacer Revision	Mar. 31, 2013 Pacer Revision Trade names	Mar. 31, 2013 Pacer Revision Customer relationships	Mar. 31, 2013 Pacer Revision Non-compete agreements	Mar. 31, 2013 Pacer Revision Land	Mar. 31, 2013 Pacer Revision Tanks and other retail propane equipment	Mar. 31, 2013 Pacer Revision Vehicles	Mar. 31, 2013 Pacer Revision Buildings	Mar. 31, 2013 Pacer Revision Other	Jan. 03, 2012 Pacer Common units	Mar. 31, 2012 Pacer Common units
Acquisitions
Cash paid to acquire ownership interests	$ 14,000,000										$ 32,213,000
Number of common units issued to acquire ownership interests (in shares)							24,250,258	14,432,031																																	1,500,000	1,500,000
General and administrative expense									710,000
Equity issuance costs									64,000
Number of owned or leased customer service centers											17
Consideration paid for acquisition
Cash	14,000,000										32,213,000
Common units																																									30,375,000
Total consideration paid											62,588,000
Estimated fair value of the assets acquired and liabilities assumed
Accounts receivable										4,389,000														4,389,000
Inventory										965,000														965,000
Other current assets										43,000														43,000
Property, plant and equipment															1,967,000	12,793,000			3,090,000	409,000	59,000						1,400,000	11,200,000	5,000,000	2,300,000	200,000					567,000	1,593,000	(1,910,000)	(1,891,000)	(141,000)
Useful life of property, plant and equipment		5 years	5 years	10 years	10 years	5 years											15 years	20 years	5 years	30 years		3 years	5 years
Intangible assets												2,410,000	23,560,000	1,520,000											1,000,000	21,980,000							1,410,000	1,580,000	1,520,000
Useful life of intangible assets													15 years
Goodwill										15,782,000														18,460,000								(2,678,000)
Assumed liabilities										(4,399,000)														(4,349,000)								(50,000)
Consideration paid, net of cash acquired										$ 62,588,000														$ 62,588,000