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Income taxes (Details) (CAD) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 provincial_jurisdiction | Dec. 31, 2012
Operating Loss Carryforwards [Line Items] |  |
Loss from continuing operations before income taxes | (24,149) | (42,778)
Tax rate | 25.26% | 25.12%
Expected benefit | (6,101) | (10,746)
(Decrease) increase related to: |  |
Impact of enacted future statutory income tax rates | (209) | 160
Income tax adjustments and reassessments | (249) | 407
Non deductible portion of capital losses | 69 | (137)
Stock-based compensation | 315 | 112
Other | 73 | (78)
Income tax benefit | (6,102) | (10,282)
Current income tax (benefit) expense | (2,438) | 1,030
Deferred income tax (benefit) (note 10) | (3,664) | (11,312)
Deferred tax assets: |  |
Non-capital losses | 39,604 | 54,086
Deferred financing costs | 1,709 | 0
Derivative financial instruments | 0 | 1,646
Billings in excess of costs on uncompleted contracts | 1,606 | 2,451
Capital lease obligations | 10,914 | 12,462
Deferred lease inducements | 91 | 114
Stock-based compensation | 1,880 | 1,001
Other | 409 | 510
Total deferred tax assets | 56,213 | 72,270
Deferred tax liabilities: |  |
Unbilled revenue and uncertified revenue included in accounts receivable | 5,338 | 12,097
Assets held for sale | 13 | 63
Accounts receivable – holdbacks | 2,308 | 8,379
Property, plant and equipment | 56,945 | 67,257
Deferred financing costs | 0 | 277
Intangible assets | 0 | 8
Deferred partnership income | 18,125 | 0
Total deferred tax liabilities | 82,729 | 88,081
Net deferred income tax liability | (26,516) | (15,811)
Net deferred tax liability classification |  |
Current asset | 3,678 | 4,396
Long term asset | 27,660 | 56,814
Current liability | (8,036) | (19,082)
Long term liability | (49,818) | (57,939)
Net deferred income tax liability | (26,516) | (15,811)
Number of provincial jurisdictions | 5 |
Operating loss carryforwards | 156,784 |
2027 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 283 |
2028 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 0 |
2029 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 13,676 |
2030 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 1 |
2031 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 21,368 |
2032 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 40,830 |
2033 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 55,160 |
2034 |  |
Net deferred tax liability classification |  |
Operating loss carryforwards | 25,466 |
Capital loss carryforward |  |
Net deferred tax liability classification |  |
Valuation allowance, amount | 962 | 962

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318 + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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