Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2014

Goodwill and Other Intangible Assets

Schedule of other intangible assets

	As at March 31,
	2014			2013
Customer contracts and relationships, beginning of the year	$	163,073		$	163,073
Additions		2,007			—
Less accumulated amortization		(117,888	)		(107,345	)
Customer contracts and relationships, end of the year		47,192			55,728
Pipeline rights of way		18,270			18,270
	$	65,462		$	73,998

Schedule of actual amortization expense

Amortization expense for the fiscal year ended:
March 31, 2014	$	10,543
March 31, 2013		11,311
March 31, 2012		13,675

Schedule of estimated future amortization expense

Future amortization expense estimated for the fiscal year ending:
March 31, 2015	$	23,633
March 31, 2016		5,977
March 31, 2017		7,513
March 31, 2018		3,558
March 31, 2019 and thereafter		6,511