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Other assets (Tables)

12 Months Ended

Mar. 31, 2013

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of other assets

Other assets are as follows:



		March 31, 2013				March 31, 2012
Prepaid lease payments (note 8)		$	764			$	895
Intangible assets (note 13(b))		8,625				12,866
Deferred financing costs (note 13(c))		4,973				6,141
		$	14,362			$	19,902

Schedule of intangible assets

Intangible assets



March 31, 2013		Cost				Accumulated Amortization				Net Book Value
Other intangible assets		$	350			$	328			$	22
Internal-use software		21,914				13,311				8,603
		$	22,264			$	13,639			$	8,625



March 31, 2012		Cost				Accumulated Amortization				Net Book Value
Customer relationships and backlog		$	4,442			$	1,445			$	2,997
Other intangible assets		2,364				1,204				1,160
Internal-use software		16,825				9,644				7,181
Patents		2,017				489				1,528
		$	25,648			$	12,782			$	12,866

Schedule of estimated amortization expense for future years

The estimated amortization expense for future years is as follows:



For the year ending March 31,
2014		$	3,430
2015		2,612
2016		1,801
2017		782
2018 and thereafter		—
		$	8,625

Schedule of deferred finance costs

Deferred financing costs



March 31, 2013		Cost				Accumulated Amortization				Net Book Value
Term and Revolving Facilities		$	5,861			$	5,384			$	477
Series 1 Debentures		6,886				2,390				4,496
		$	12,747			$	7,774			$	4,973



March 31, 2012		Cost				Accumulated Amortization				Net Book Value
Term and Revolving Facilities		$	5,422			$	4,652			$	770
Series 1 Debentures		6,886				1,515				5,371
		$	12,308			$	6,167			$	6,141