| X | ||||||||||
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- Definition Settlement of DSUs to actual common stock percentage No definition available. 
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| X | ||||||||||
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- Definition Settlement of DSUs to actual issued common stock term. No definition available. 
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| X | ||||||||||
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- Definition Employee Termination Age No definition available. 
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| X | ||||||||||
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- Definition Maximum contractual interest rate under Notes Receivable. No definition available. 
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| X | ||||||||||
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- Definition Minimum contractual interest rate under Notes Receivable. No definition available. 
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| X | ||||||||||
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- Definition The latest date when the various notes receivable are scheduled to be fully repaid. No definition available. 
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| X | ||||||||||
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- Definition Percentage of deferred stock units settled in the event of death or employment termination. No definition available. 
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| X | ||||||||||
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- Definition Percentage Of Shares Of Common Stock Released From Resale Restriction on Change of Control No definition available. 
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| X | ||||||||||
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- Definition Percentage of shares of deferred stock units released from resale restriction in the event of death or employment termination. No definition available. 
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| X | ||||||||||
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Sales Restriction Lapse Percentage No definition available. 
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| X | ||||||||||
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Sales Restriction Period No definition available. 
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| X | ||||||||||
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- Definition SARS liability frozen value date. No definition available. 
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| X | ||||||||||
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
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| X | ||||||||||
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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