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Other assets (Tables) | 12 Months Ended
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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 |

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