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Other long term obligations (Details) - CAD CAD in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Other Liabilities, Noncurrent [Abstract] |  |  |
Deferred lease inducements | CAD 145 | CAD 252 |
Asset retirement obligation | 617 | 562 | CAD 512
Deferred gain on sale leaseback (note 16(d)) | 780 | 371 | CAD 0
Other obligations, current and noncurrent | 4,459 | 4,991 |
Less current portion of: |  |  |
Deferred gain on sale leaseback | (221) | (93) |
Other obligations, noncurrent portion | 3,567 | 3,459 |
Stock options | Senior executive stock option plan |  |  |
Other Liabilities, Noncurrent [Abstract] |  |  |
Deferred compensation plans | 0 | 22 |
Less current portion of: |  |  |
Deferred compensation plans, current | 0 | (22) |
Restricted share units (RSUs) | Restricted share unit plan |  |  |
Other Liabilities, Noncurrent [Abstract] |  |  |
Deferred compensation plans | 671 | 1,779 |
Less current portion of: |  |  |
Deferred compensation plans, current | (671) | (1,009) |
Deferred stock units (DSUs) | Directors' deferred share unit plan |  |  |
Other Liabilities, Noncurrent [Abstract] |  |  |
Deferred compensation plans | 2,246 | 2,005 |
Less current portion of: |  |  |
Deferred compensation plans, current | CAD 0 | CAD (408) |

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Asset Retirement Obligation -URI http://asc.fasb.org/extlink&oid=6505190 + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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