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Common shares (Details)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 1 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
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Aug. 17, 2012
|
Aug. 08, 2012
CAD
item
|
Jul. 31, 2012
USD ($)
|
Jul. 31, 2012
CAD
|
Nov. 30, 2011
|
Oct. 31, 2011
USD ($)
|
Oct. 31, 2011
CAD
|
Oct. 31, 2010
USD ($)
|
|
| Common shares | ||||||||
| Shares issued in connection with acquisition | 31,500,215 | |||||||
| Issuance of common shares | 5,567,177 | 5,567,177 | 12,650,000 | 12,650,000 | 6,029,000 | |||
| Issuance of common shares pursuant to the exercise of underwriters' over-allotment option in public offering | 1,650,000 | 1,650,000 | 784,000 | |||||
| Price of common shares issued (in dollars per share) | $ 12.76 | 13.10 | $ 13.00 | 13.26 | $ 13.35 | |||
| Proceed from issuance of common stock public offering net of underwriting discounts and costs | $ 68.5 | $ 155.4 | $ 75.3 | |||||
| Maximum amount of securities that may be offered and sold | 750 | |||||||
| Minimum number of series for convertible securities | 1 | |||||||
| Life of registration statement | 25 months | 3 years | ||||||