Related Party Transactions (Details) (USD $)	12 Months Ended					0 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2012	Mar. 31, 2013	Mar. 17, 2014 Senior Notes	Aug. 24, 2011 Senior Notes	Aug. 24, 2011 Sponsor Holdings	Mar. 31, 2014 Affiliated entities	Mar. 31, 2013 Affiliated entities	Mar. 31, 2012 Affiliated entities	Mar. 31, 2012 Sponsor Holdings Cooperatief U.A. and R/C Sundance Cooperatief U.A. Starks Gas Storage LLC, Coastal Bend Gas Storage LLC, and Sundance Gas Storage ULC	Mar. 31, 2014 Carlyle/Riverstone Funds
Related Party Transactions
Amount owing to related parties	$ 0		$ 0
Amount owing from related parties	0		0
Management fees charged for administrative services rendered							200,000	200,000	900,000
Common units issued under DRIP	1,252,815										1,252,810
Non cash earnings distribution and reinvestments	18,270,000										18,300,000
Consideration for purchased net assets										5,000,000
Aggregate purchase price recorded as a reduction of equity		(2,176,000)							2,176,000
Number of shares issued						687,500
Offering price (in dollars per unit)						$ 16.00
Total proceeds from issuance and sale of common units		$ 11,000,000				$ 11,000,000
Interest rate (as a percent)				8.875%	8.875%