SHARE CAPITAL Voting Ordinary Shares Issued and Outstanding (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common Class A
Increase (Decrease) in Common Stock [Roll Forward]
Balance – beginning of year (in shares)	30,130,214	31,104,830	31,111,432
Issue of ordinary shares, net of forfeitures (in shares)	609,181	205,384	129,530
Repurchase of ordinary shares (in shares)	0	(1,180,000)	(136,312)
Class B shares converted to Class A shares (in shares)	0	0	180
Balance – end of year (in shares)	30,739,395	30,130,214	31,104,830
Common Class B
Increase (Decrease) in Common Stock [Roll Forward]
Balance – beginning of year (in shares)	6,254,715	6,254,715	6,254,895
Issue of ordinary shares, net of forfeitures (in shares)	0	0	0
Repurchase of ordinary shares (in shares)	0	0	0
Class B shares converted to Class A shares (in shares)	0	0	(180)
Balance – end of year (in shares)	6,254,715	6,254,715	6,254,715