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Consolidated Statements of Operations and Comprehensive (Loss) Income (CAD) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011 | Mar. 31, 2010
Consolidated Statements of Operations and Comprehensive (Loss) Income [Abstract] |  |  |
Revenue | 1,006,545 | 858,048 | 758,965
Project costs | 610,821 | 456,119 | 301,307
Equipment costs | 220,738 | 234,933 | 209,408
Equipment operating lease expense | 65,185 | 69,420 | 66,329
Depreciation | 48,900 | 39,440 | 42,636
Gross profit | 60,901 | 58,136 | 139,285
General and administrative expenses | 54,400 | 59,828 | 62,516
Loss on disposal of property, plant and equipment | 1,741 | 1,948 | 1,233
(Gain) loss on disposal of assets held for sale (note 12(b)) | (466) | 825 | 373
Amortization of intangible assets (note 12(c)) | 5,702 | 3,540 | 1,719
Equity in (earnings) loss of unconsolidated joint venture (note 11) | (86) | 2,720 | (44)
Operating (loss) income before the undernoted | (390) | (10,725) | 73,488
Interest expense, net (note 19) | 30,325 | 29,991 | 26,080
Foreign exchange loss (gain) | 52 | (1,659) | (48,901)
Realized and unrealized (gain) loss on derivative financial instruments (note 21(a)) | (2,382) | (2,305) | 54,411
Loss on debt extinguishment (note 15(d)) |  | 4,346 |
(Loss) income before income taxes | (28,385) | (41,098) | 41,898
Income tax (benefit) expense (note 17): |  |  |
Current | (677) | 2,892 | 3,803
Deferred | (6,546) | (9,340) | 9,876
Net (loss) income | (21,162) | (34,650) | 28,219
Other comprehensive income (loss) |  |  |
Unrealized foreign currency translation gain (loss) | 40 | (59) |
Comprehensive (loss) income | (21,122) | (34,709) | 28,219
Net (loss) income per share - basic (note 18(b)) | (0.58) | (0.96) | 0.78
Net (loss) income per share - diluted (note 18(b)) | (0.58) | (0.96) | 0.77

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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