Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

Percentage of vesting of share-based compensation awards.

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-Publisher FASB
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-SubTopic 10
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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-based Compensation (Narrative of Share Options) (Details) - Share options [Member] - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Apr. 01, 2011	Jan. 25, 2006	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value per option granted during period			$ 18.29	$ 32.61	$ 13.19
Total intrinsic value of options exercised during period			$ 64,732	$ 98,112	$ 138,364
Allocated share-based compensation expense			34,291	$ 16,702	$ 21,921
Unrecognized share-based compensation expense relating to share options			$ 6,678
Period for recognition of unrecognized share-based compensation expense (in years)			4 years 9 months 8 days
2006 Employee Share Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share options, validity period (in years)		10 years
2006 Employee Share Option Plan [Member] \| Each anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of aggregate number of options will be vested			25.00%
2011 Employee Share Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share options, validity period (in years)	10 years
2011 Employee Share Incentive Plan [Member] \| 12 months after start of vesting period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of aggregate number of options will be vested			20.00%
2011 Employee Share Incentive Plan [Member] \| 24 months after start of vesting period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of aggregate number of options will be vested			20.00%
2011 Employee Share Incentive Plan [Member] \| 36 months after start of vesting period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of aggregate number of options will be vested			30.00%
2011 Employee Share Incentive Plan [Member] \| 48 months after start of vesting period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of aggregate number of options will be vested			30.00%