Common Shares (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of Change in Number of Shares

Change in Number of Shares

	Number of ordinary shares
Balance at January 1, 2015	60,902,695
Issuance of shares under share option and free share plans (1)	1,568,186
Balance at December 31, 2015	62,470,881
Issuance of shares under share option and free share plans (2)	1,507,323
Balance at December 31, 2016	63,978,204

⁽¹⁾ Adopted by the Board of Directors on January 29, 2015, March 19, 2015, April 30, 2015, July 30, 2015, October 29, 2015 and December 17, 2015.

⁽²⁾ Adopted by the Board of Directors on January 29, 2016, February 25, 2016, April 20, 2016, June 28, 2016, July 28, 2016, October 27, 2016 and November 9, 2016.