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Income taxes Narrative(Details) CAD in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 CAD provincial_jurisdiction | Dec. 31, 2014 CAD | Dec. 31, 2013 CAD
Operating Loss Carryforwards [Line Items] |  |  |
Current | CAD 0 | CAD (92) | CAD (2,438)
Number of provincial jurisdictions | provincial_jurisdiction | 3 |  |
Number of additional provincial income taxing jurisdictions, prior to disposal | provincial_jurisdiction | 2 |  |
Deferred | CAD (114) | 61 | (3,664)
Income tax benefit | (114) | (31) | (6,102)
Capital loss carryforward |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Valuation allowance, amount | CAD 1,035 | CAD 962 | CAD 962

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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) 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 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6509736 Reference 4: 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.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 + Details
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