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Shares - Dividends (Details) - CAD CAD / shares in Units, CAD in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Equity [Abstract] |  |
Annual aggregate dividend (in CAD per share) | CAD 0.08 |
Quarterly dividends paid (CAD per share) | 0.02000 | CAD 0.02
Dividends paid (in CAD per share) | CAD 0.08 | CAD 0.08
Dividends payable | CAD 510 | CAD 569

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- Definition Common Stock, Quarterly Dividends, Per Share, Cash Paid + References No definition available. + Details
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- Definition Dividends Payable, Annual Aggregate Dividend + References No definition available. + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within 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 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 Reference 2: 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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- References No definition available. + Details
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