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Shares (Tables)
12 Months Ended
Dec. 31, 2017
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, 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 (note 21(c(i)) and 21(d))
 

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

 
87,554

 
87,554

Retired through Share Purchase Program (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

Issued upon exercise of stock options (note 21(b))
 
176,800

 

 
176,800

Purchase of treasury shares for settlement of certain equity classified stock-based compensation (note 21(c(i)) and 21(d))
 

 
(758,271
)
 
(758,271
)
Settlement of certain equity classified stock-based compensation
 

 
353,592

 
353,592

Retired through Share Purchase Programs (note 17(c))
 
(2,625,557
)
 

 
(2,625,557
)
Issued and outstanding at December 31, 2017
 
28,070,150

 
(2,617,926
)
 
25,452,224

Schedule of net (loss) income per share
Year ended December 31,
 
2017

 
2016

Net income (loss) available to common shareholders
 
$
5,264

 
$
(445
)
 
 
 
 
 
Weighted average number of common shares
 
26,697,066

 
29,965,899

Weighted average of effects:
 
 
 
 
Dilutive effect of treasury shares
 
2,622,957

 

Dilutive effect of stock options
 
285,703

 

Weighted average number of diluted common shares
 
29,605,726

 
29,965,899

 
 
 
 
 
Basic net income (loss) per share
 
$
0.20

 
$
(0.01
)
Diluted net income (loss) per share
 
$
0.18

 
$
(0.01
)
Schedule of shares repurchased
The Company engaged in the following normal course issuer bids ("NCIBs") during the years ended December 31, 2016 and December 31, 2017:
Commencement date
 
Facilities
 
Maximum number of shares to be purchased

 
Actual number of shares purchased and subsequently cancelled

 
Reduction to common shares

 
Increase to additional paid in capital

 
 
 
 
 
 
 
 
 
 
 
March 21, 2016
 
NYSE
 
1,657,514

 
1,657,514

 
$
14,121

 
$
9,021

August 9, 2016
 
TSX
 
1,075,968

 
1,075,900

 
9,237

 
5,133

Total during the year ended December 31, 2016
 
 
 
2,733,482

 
2,733,414

 
$
23,358

 
$
14,154

 
 
 
 
 
 
 
 
 
 
 
First phase: amended NCIB(i)
 
TSX
 
819,395

 
819,395

 
$
7,057

 
$
1,576

Second phase: amended NCIB(ii)
 
TSX
 
838,119

 
663,400

 
5,706

 
1,908

August 14, 2017(iii)(iv)
 
NYSE, TSX
 
2,424,333

 
1,142,762

 
9,810

 
4,119

Total during the year ended December 31, 2017
 
 
 
4,081,847

 
2,625,557

 
$
22,573

 
$
7,603

(i) On March 28, 2017 the Company announced an increase to the maximum number of shares to be purchased relating to the NCIB that commenced on August 9, 2016 from the original 1,075,968 to 1,895,363 as of April 1, 2017.
(ii) On May 25, 2017 the Company announced a further increase to the maximum number of shares to be purchased relating to the NCIB that commenced on August 9, 2016 from the amended 1,895,363 to 2,733,482 as of June 1, 2017.
(iii) This NCIB is ongoing. All other NCIBs have reached expiration.
(iv) In order to comply with relevant securities laws, the Company can purchase a maximum of 1,460,089 of the shares on the NYSE, which represents 5% of the issued and outstanding common shares.