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Shares (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Schedule of common shares issued and outstanding
Issued and outstanding:
 
 
Voting common shares

 
Treasury shares

 
Common shares outstanding, net of treasury shares

Issued and outstanding at December 31, 2014
 
34,923,916

 
(589,892
)
 
34,334,024

Issued upon exercise of stock options (note 21(b))
 
30,080

 
—

 
30,080

Purchase of treasury shares for settlement of certain equity classified stock-based compensation
 
—

 
(687,314
)
 
(687,314
)
Settlement of certain equity classified stock-based compensation
 
—

 
20,403

 
20,403

Retired through Share Purchase Program (note 17(c))
 
(1,803,715
)
 
—

 
(1,803,715
)
Issued and outstanding at December 31, 2015
 
33,150,281

 
(1,256,803
)
 
31,893,478

Issued upon exercise of stock options (note 21(b))
 
102,040

 
—

 
102,040

Purchase of treasury shares for settlement of certain equity classified stock-based compensation
 
—

 
(1,043,998
)
 
(1,043,998
)
Settlement of certain equity classified stock-based compensation
 
—

 
87,554

 
87,554

Retired through Share Purchase Programs (note 17(c))
 
(2,733,414
)
 
—

 
(2,733,414
)
Issued and outstanding at December 31, 2016
 
30,518,907

 
(2,213,247
)
 
28,305,660
Schedule of net (loss) income per share
Net loss per share
Year ended December 31,
 
2016

 
2015

Net loss
 
$
(445
)
 
$
(7,470
)
 
 
 
 
 
Weighted average number of common shares (no dilutive effect)
 
29,965,899

 
32,758,088

 
 
 
 
 
Basic per share information (No dilutive effect)
 
 
 
 
Net loss
 
$
(0.01
)
 
(0.23
)