Share-Based Compensation (Schedule of Share Option Plans Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Shares Subject to Outstanding Options [Roll Forward]
Outstanding at January 1, 2014	4,306
Options granted	1,000
Options exercised	(1,185)
Options forfeited	(251)
Options expired	0
Outstanding at December 31, 2014	3,870
Vested and expected to vest at December 31, 2014	3,632
Exercisable at December 31, 2014	1,639
Weighted Average Exercise Price (in dollars per share) [Roll Forward]
Outstanding at January 1, 2014	$ 42.54
Options granted	$ 160.40
Options exercised	$ 36.33
Options forfeited	$ 75.08
Options expired	$ 0.00
Outstanding at December 31, 2014	$ 72.77
Vested and expected to vest at December 31, 2014	$ 70.29
Exercisable at December 31, 2014	$ 36.61
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Weighted-average remaining contractual term, outstanding at December 31, 2014 (in years)	7 years 7 months 14 days
Weighted-average remaining contractual term, vested and expected to vest, exercisable at December 31, 2014 (in years)	7 years 6 months 0 days
Weighted-average remaining contractual term, exercisable at December 31, 2014 (in years)	6 years 6 months 0 days
Aggregate intrinsic value, outstanding at December 31, 2014	$ 354,050
Aggregate intrinsic value, vested and expected to vest at December 31, 2014	341,118
Aggregate intrinsic value, exercisable at December 31, 2014	$ 208,339