Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2013 CAD	Dec. 31, 2012 CAD	Dec. 31, 2011 CAD	Dec. 31, 2013 Common Shares [Member] CAD	Dec. 31, 2012 Common Shares [Member] CAD	Dec. 31, 2011 Common Shares [Member] CAD	Dec. 31, 2013 Additional Paid-in Capital [Member] USD ($)	Dec. 31, 2013 Additional Paid-in Capital [Member] CAD	Dec. 31, 2012 Additional Paid-in Capital [Member] CAD	Dec. 31, 2011 Additional Paid-in Capital [Member] CAD
Lower price range for exercise of stock options	2.44	2.44	2.44	2.44	2.44	2.44		2.44	2.44	2.44
Higher price range for exercise of stock options	7.23	7.23	7.20	7.23	7.23	7.20		7.23	7.23	7.20
Cash distribution to common shareholders, per share							$ 3.92