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Other long term obligations (Details) (CAD) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Other Liabilities, Noncurrent [Abstract] |  |
Liabilities related to equipment leases | 0 | 209
Deferred lease inducements (note 17(b)) | 359 | 466
Asset retirement obligation (note 17(c)) | 512 | 466
Other obligations, current and noncurrent | 9,140 | 5,544
Less current portion of: |  |
Other obligations, noncurrent portion | 7,207 | 4,788
Lease Incentive, Payable [Roll Forward] |  |
Balance, beginning of year | 466 | 574
Amortization of deferred lease inducements | (107) | (108)
Balance, end of year | 359 | 466
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |  |
Balance, beginning of year | 466 | 424
Accretion expense | 46 | 42
Balance, end of year | 512 | 466
Estimated undiscounted cash flows required to settle obligation | 1,084 | 1,084
Credit adjusted risk-free rate assumed in measuring the asset retirement obligation (percent) | 9.42% |
Stock options | Senior executive stock option plan |  |
Other Liabilities, Noncurrent [Abstract] |  |
Deferred compensation plans | 940 | 591
Restricted share units (RSUs) | Restricted share unit plan |  |
Other Liabilities, Noncurrent [Abstract] |  |
Deferred compensation plans | 3,667 | 1,742
Less current portion of: |  |
Deferred compensation plans, current | (1,933) | (503)
Deferred stock units (DSUs) | Directors' deferred share unit plan |  |
Other Liabilities, Noncurrent [Abstract] |  |
Deferred compensation plans | 3,662 | 2,070
Less current portion of: |  |
Deferred compensation plans, current | 0 | (253)

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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for contractual rent under lease arrangements. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 24 -Article 5 + Details
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- Definition Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e40010-112707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e40019-112707 + Details
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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 This item represents an incentive or inducement contractually stipulated between parties to a lease whereby the lessor has committed to provide the entity (lessee) with a cash payment as inducement to enter the lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 + Details
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