Consolidated Statements of Earnings (Loss) and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Fee-based revenue	$ 33,197	$ 40,998	$ 64,667	$ 78,059
Optimization, net	3,666	(16,453)	29,384	(56,301)
Total revenues	36,863	24,545	94,051	21,758
Expenses (income):
Operating	8,877	8,826	19,321	16,920
General and administrative	9,515	8,077	20,804	17,915
Depreciation and amortization	10,298	13,242	20,631	25,065
Interest	16,397	16,672	32,603	33,180
Loss on extinguishment of debt				599
Foreign exchange (gains) losses	(410)	(149)	447	(336)
Other (income) expense	(17)	(8)	374	(185)
LOSS BEFORE INCOME TAXES	(7,797)	(22,115)	(129)	(71,400)
Income tax expense (benefit)	48	(6,718)	(252)	(18,658)
NET EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS)	(7,845)	(15,397)	123	(52,742)
Net earnings (loss) allocated to:
Managing Member	(154)	(305)	4	(1,044)
Common unitholders	(7,691)	(7,622)	119	(26,109)
Subordinated unitholder (Notes 1 and 6)		$ (7,470)		$ (25,589)
Earnings (loss) per unit allocated to common unitholders
basic (in dollars per unit)	$ (0.22)	$ (0.22)		$ (0.76)
diluted (in dollars per unit)	$ (0.22)	$ (0.22)		$ (0.76)
Earnings (loss) per unit allocated to subordinated unitholders
basic (in dollars per unit) (Notes 1 and 6)		$ (0.22)		$ (0.76)
diluted (in dollars per unit) (Notes 1 and 6)		$ (0.22)		$ (0.76)