Income Taxes (Tables)

12 Months Ended

Mar. 31, 2014

Income Taxes

Schedule of components of the Company's earnings (loss) before income taxes (benefits)

	Year ended March 31,
	2014			2013			2012
Domestic	$	16,844		$	(493	)	$	72,270
Foreign		(36,057	)		(62,050	)		(257,729	)
	$	(19,213	)	$	(62,543	)	$	(185,459	)

Schedule of total income tax expense (benefit) differed from the amounts computed by applying the tax rate to earnings (loss) before income taxes

	Year ended March 31,
	2014			2013			2012
Net earnings (loss) before taxes	$	(19,213	)	$	(62,543	)	$	(185,459	)
U.S. federal corporate statutory rate		35.00	%		35.00	%		35.00	%
Expected tax		(6,725	)		(21,890	)		(64,911	)
Earnings (loss) of non-taxable entities		(6,296	)		1,377			(25,295	)
Canadian statutory tax rate differences		3,559			6,145			22,768
Change in valuation allowance		(1,248	)		(452	)		(8,413	)
Adjustments and assessments		(690	)		(4,796	)		(7,529	)
Non-deductible expense related to asset impairment		—			—			59,304
Taxable capital gains		—			—			3,895
Non-deductible expenses and other		1,144			674			494
Income tax benefit	$	(10,256	)	$	(18,942	)	$	(19,687	)

Schedule of significant components of the deferred income tax liabilities and deferred income tax assets

	As at March 31,
	2014			2013
Deferred income tax assets:
Risk management liabilities	$	33,386		$	8,904
Non-capital loss carry forwards		18,434			8,451
Deferred charges		6,890			1,166
Capital losses		2,358			2,577
Other		2,403			806
		63,471			21,904
Valuation allowance		(4,004	)		(2,607	)
Total deferred income tax assets	$	59,467		$	19,297
Deferred income tax liabilities:
Property, plant and equipment	$	114,298		$	114,148
Intangible assets		15,137			17,636
Partnership deferral income		37,499			11,007
Risk management assets		17,049			11,477
Other		535			267
Total deferred income tax liabilities		184,518			154,535
Net deferred income tax liabilities	$	125,051		$	135,238

Schedule of classification of net deferred income tax liabilities

	As at March 31,
	2014		2013
Deferred income tax liabilities:
Current	$	5,678	$	14,303
Long-term		119,373		120,935
	$	125,051	$	135,238

Schedule of changes in unrecognized tax benefits

	As at March 31,
	2014		2013
Balance at April 1,	$	1,160	$	3,267
Additions based on tax positions taken in the current year		375		—
Additions (reductions) based on tax positions taken in a prior year		200		(1,411	)
Settlements with taxing authorities in the current year		—		(696	)
Balance at March 31,	$	1,735	$	1,160