Employee Benefits and Share Option Plans (Details)	9 Months Ended
	Sep. 30, 2014
Time Based Options
Number of Share Option Awards
Outstanding as of December 31, 2013	3,242,643
Granted	2,473,115
Exercised	(95,365)
Forfeited or expired	(71,890)
Outstanding as of September 30, 2014	5,548,503
Performance Based Options
Number of Share Option Awards
Outstanding as of December 31, 2013	1,572,516
Granted
Exercised	(72,175)
Forfeited or expired	(2,866)
Outstanding as of September 30, 2014	1,497,475