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SHARE CAPITAL (Tables)
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Schedule of Common Stock Outstanding Roll Forward
The following table is a summary of voting ordinary shares issued and outstanding:
 
 
2017
 
2016
 
2015
 
 
Class A
 
Class B
 
Class A
 
Class B
 
Class A
 
Class B
Balance – beginning of year
 
31,111,432

 
6,254,895

 
30,772,572

 
6,254,895

 
31,129,648

 
6,254,895

Issue of ordinary shares, net of forfeitures
 
129,530

 
—

 
338,860

 
—

 
256,464

 
—

Repurchase of ordinary shares
 
(136,312
)
 
—

 
—

 
—

 
(613,540
)
 
—

Class B shares converted to Class A shares
 
180

 
(180
)
 
—

 
—

 
—

 
—

Balance – end of year
 
31,104,830

 
6,254,715

 
31,111,432

 
6,254,895

 
30,772,572

 
6,254,895