Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net earnings (loss)	$ (8,957)	$ (43,601)	$ (165,772)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Unrealized foreign exchange losses (gains)	1,500	(252)	391
Deferred income tax benefit (Note 11)	(10,338)	(17,528)	(20,648)
Unrealized risk management losses (gains) (Notes 12 and 13)	8,732	89,851	(83,193)
Depreciation and amortization (Notes 4 and 5)	41,286	50,409	46,132
Deferred charges amortization (Notes 6 and 16)	3,354	3,411	3,942
Loss on extinguishment of debt (Notes 6, 7 and 17)	36,697	599	4,861
Loss on impairment and sale of assets (Note 4)		14,927	5,342
Impairment of goodwill (Note 5)			250,000
Write-down of inventory	4,600	22,281	23,400
Changes in non-cash working capital (Note 20)	15,033	42,033	(56,420)
Net cash provided by operating activities	91,907	162,130	8,035
Investing Activities
Property, plant and equipment expenditures	(3,159)	(30,015)	(52,820)
Purchase of customer contracts	(2,007)
Proceeds on disposal of assets		2,210
Net cash used in investing activities	(5,166)	(27,805)	(52,820)
Financing Activities
Proceeds from debt issuance	575,000
Debt redemption / repurchase	(672,361)		(158,012)
Proceeds on revolver drawings	784,500	348,448	701,800
Revolver repayments	(730,000)	(433,448)	(551,800)
Payments of financing costs	(10,855)	(3,248)
Payments of unit issuance costs	(218)
Proceeds from obligations under capital lease		947	13,245
Repayments of obligations under capital lease	(1,259)	(717)
Distributions to partners (Notes 14 and 24)	(34,051)	(48,811)	(74,568)
Net proceeds from issuance of common units			11,000
Acquisition of interest in parent company			(2,176)
Acquisition of assets from parent company			428
Net cash used in financing activities	(89,244)	(136,829)	(60,083)
Effect of translation on foreign currency cash and cash equivalents	(403)	(228)	468
Net decrease in cash and cash equivalents	(2,906)	(2,732)	(104,400)
Cash and cash equivalents, beginning of the year	10,610	13,342	117,742
Cash and cash equivalents, end of the year	$ 7,704	$ 10,610	$ 13,342