Amount receivable from exercise of stock options.

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Represents the exercise price of shares exchanged as a result of modification of an equity-based compensation plan.

+ References

No definition available.

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Represents the exercise price of shares issued upon exchange as a result of modification of an equity-based compensation plan.

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No definition available.

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Represents the exercise multiple which is estimated as the ratio of fair value of underlying shares over the exercise price as at the time the option is exercise.

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No definition available.

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Represents the number of shares under options that were exchanged during the reporting in connection with the share option exchange program.

+ References

No definition available.

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No definition available.

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Represents the number of shares exchanged as a result of modification of an equity-based compensation plan.

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No definition available.

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The fair value of the underlying shares on the date of option grants that is used in valuing an option on its own shares.

+ References

No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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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.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

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Unrecognized cost of unvested options awarded to employees as compensation.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- References

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 2
-Subparagraph (f)(2)(iii)
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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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No definition available.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

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.

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Subparagraph (c)(1)(iv)(4)
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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- References

No definition available.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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Weighted average remaining contractual term for option awards outstanding, 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 (Details 2)		1 Months Ended	12 Months Ended
Share-based Compensation (Details 2)	Dec. 20, 2013 $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 CNY (¥) shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2014 CNY (¥) shares	Dec. 31, 2013 USD ($) $ / shares	Dec. 31, 2013 CNY (¥) shares	Dec. 31, 2015 CNY (¥) shares
Additional disclosures
Share-based compensation charge \| ¥				¥ 1,193,945,000		¥ 4,249,548,000		¥ 261,173,000
Employees \| Non-vested ordinary shares
Number of Shares
Unvested at the beginning of the year (in shares)			0	0				2,829,080
Vested (in shares)								(2,320,633)
Forfeited (in shares)								(508,447)
Unvested at the end of the year (in shares)					0	0
Weighted-Average Grant-Date Fair Value
Unvested at the beginning of the year (in dollars per share) \| $ / shares			$ 0				$ 0.24
Vested (in dollars per share) \| $ / shares							0.24
Forfeited (in dollars per share) \| $ / shares							0.24
Unvested at the end of the year (in dollars per share) \| $ / shares					$ 0
Additional disclosures
Share-based compensation charge \| ¥				¥ 0		¥ 0		¥ 1,142,000
Employees \| Non-vested ordinary shares \| Minimum
Share-based compensation
Year in which shares are vested			3 years	3 years
Employees \| Non-vested ordinary shares \| Maximum
Share-based compensation
Year in which shares are vested			6 years	6 years
Employees \| RSUs \| Minimum
Share-based compensation
Year in which shares are vested			3 years	3 years
Employees \| RSUs \| Maximum
Share-based compensation
Year in which shares are vested			6 years	6 years
Employees \| RSUs \| Vesting Based On Service
Number of Shares
Unvested at the beginning of the year (in shares)			31,703,526	31,703,526	27,150,848	27,150,848		30,818,337
Granted (in shares)			18,295,642	18,295,642	14,588,400	14,588,400		15,075,413
RSUs exchanged in connection with the share option exchange program (in shares)								(7,954,526)
Vested (in shares)			(7,130,556)	(7,130,556)	(6,385,905)	(6,385,905)		(6,365,824)
Forfeited (in shares)			(3,934,276)	(3,934,276)	(3,649,817)	(3,649,817)		(4,422,552)
Unvested at the end of the year (in shares)		27,150,848	38,934,336	38,934,336	31,703,526	31,703,526		27,150,848
Weighted-Average Grant-Date Fair Value
Unvested at the beginning of the year (in dollars per share) \| $ / shares			$ 5.77		$ 3.77		3.65
Granted (in dollars per share) \| $ / shares			14.37		8.43		3.95
RSUs exchanged in connection with the share option exchange program (in dollars per share) \| $ / shares							3.83
Vested (in dollars per share) \| $ / shares			4.96		3.71		3.62
Forfeited (in dollars per share) \| $ / shares			9.73		5.07		3.66
Unvested at the end of the year (in dollars per share) \| $ / shares		$ 3.77	$ 9.56		$ 5.77		3.77
Additional disclosures
Share-based compensation charge \| ¥				¥ 690,742,000		¥ 386,632,000		¥ 254,124,000
Unrecognized share-based compensation expense related to awards other than options \| ¥									¥ 1,649,328,000
Weighted-average period over which share-based compensation expense is expected to be recognized			5 years 1 month 6 days	5 years 1 month 6 days
Employees \| RSUs \| Vesting Based On Performance
Number of Shares
Unvested at the beginning of the year (in shares)			1,466,658	1,466,658
Granted (in shares)			0	0	1,515,151	1,515,151		0
Vested (in shares)			(188,936)	(188,936)
Forfeited (in shares)			(401,358)	(401,358)	(48,493)	(48,493)
Unvested at the end of the year (in shares)			876,364	876,364	1,466,658	1,466,658
Weighted-Average Grant-Date Fair Value
Unvested at the beginning of the year (in dollars per share) \| $ / shares			$ 6.33
Granted (in dollars per share) \| $ / shares					$ 6.33
Vested (in dollars per share) \| $ / shares			6.33
Forfeited (in dollars per share) \| $ / shares			6.33		6.33
Unvested at the end of the year (in dollars per share) \| $ / shares			$ 6.33		6.33
Additional disclosures
Share-based compensation charge \| ¥				¥ 4,630,000		¥ 14,124,000		¥ 0
Unrecognized share-based compensation expense related to awards other than options \| ¥									7,788,000
Weighted-average period over which share-based compensation expense is expected to be recognized			3 years 1 month 6 days	3 years 1 month 6 days
Employees \| Employee options
Number of share options
Exercised								0
Additional disclosures
Share-based compensation charge \| ¥				¥ 103,962,000		¥ 115,469,000		¥ 4,007,000
Weighted average grant date fair value of options granted \| $ / shares			$ 5.59		$ 4.48		$ 1.94
Unrecognized share-based compensation expense related to options \| ¥									¥ 271,059,000
Weighted-average period over which share-based compensation expense is expected to be recognized			5 years	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value \| $			$ 29,522,000		$ 6,648,000
Cash received from the exercises of share options \| $			12,332,000		0
Cash Receivable From Stock Option Exercises \| $			$ 1,992,000		$ 3,365,000
Assumptions used to calculate estimated fair value of each option grant
Exercise multiples					2.8	2.8		2.8
Expected dividend yield (as a percent)			0.00%	0.00%
Expected term (in years)			10 years	10 years
Fair value of the underlying shares on the date of option grants (in dollars) \| $		$ 3.96					$ 3.96
Employees \| Employee options \| Minimum
Share-based compensation
Year in which shares are vested			3 years	3 years
Assumptions used to calculate estimated fair value of each option grant
Expected volatility (as a percent)			33.00%	33.00%	52.00%	52.00%		47.00%
Risk-free interest rate (per annum) (as a percent)			2.17%	2.17%	2.42%	2.42%		1.83%
Exercise multiples			2.0	2.0
Expected term (in years)			10 years	10 years				7 years 4 months 24 days
Fair value of the underlying shares on the date of option grants (in dollars) \| $			$ 11.57		$ 6.33
Employees \| Employee options \| Maximum
Share-based compensation
Year in which shares are vested			6 years	6 years
Assumptions used to calculate estimated fair value of each option grant
Expected volatility (as a percent)			50.00%	50.00%	53.00%	53.00%		50.00%
Risk-free interest rate (per annum) (as a percent)			2.65%	2.65%	3.50%	3.50%		2.91%
Exercise multiples			2.8	2.8
Expected term (in years)					10 years	10 years		10 years
Fair value of the underlying shares on the date of option grants (in dollars) \| $			$ 14.69		$ 12.51
Employees \| Employee options \| Vesting Based On Service
Number of share options
Outstanding at the beginning of the year (in shares)			26,201,252	26,201,252	26,912,328	26,912,328
Granted (in shares)			5,652,500	5,652,500	2,745,000	2,745,000		3,048,750
Share options exchanged in connection with the share option exchange program								23,863,578
Exercised			(2,694,404)	(2,694,404)	(849,844)	(849,844)
Forfeited or cancelled (in shares)			(1,724,726)	(1,724,726)	(2,606,232)	(2,606,232)
Expired (in shares)			0	0
Outstanding at the end of the year (in shares)		26,912,328	27,434,622	27,434,622	26,201,252	26,201,252		26,912,328
Vested and expected to vest at the end of the year (in shares)			24,691,160						24,691,160
Exercisable at the end of the year (in shares)			7,250,546						7,250,546
Weighted Average Exercise Price
Outstanding at the beginning of the year (in dollars per share) \| $ / shares			$ 4.37		$ 3.96
Granted (in dollars per share) \| $ / shares			13.17		8.20		$ 3.96
Share options exchanged in connection with the share option exchange program (in dollars per share) \| $ / shares							3.96
Exercised (in dollars per share) \| $ / shares			4.07		3.96
Forfeited or cancelled (in dollars per share) \| $ / shares			6.07		4.31
Outstanding at the end of the year (in dollars per share) \| $ / shares		$ 3.96	6.10		$ 4.37		$ 3.96
Vested and expected to vest at the end of the year (in dollars per share) \| $ / shares			6.10
Expired (in dollars per share) \| $ / shares			0.00
Exercisable at the end of the year (in dollars per share) \| $ / shares			$ 4.08
Weighted Average Remaining Contractual Term (years)
Outstanding at the end of the year			8 years 1 month 6 days	8 years 1 month 6 days	8 years 6 months	8 years 6 months		9 years 4 months 24 days
Vested and expected to vest at the end of the year			8 years 1 month 6 days	8 years 1 month 6 days
Exercisable at the end of the year			7 years 4 months 24 days	7 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding at the end of the year (in dollars) \| $			$ 275,040,000		$ 189,729,000
Vested and expected to vest at the end of the year (in dollars) \| $			247,536,000
Exercisable at the end of the year (in dollars) \| $			$ 87,394,000
Share option exchange program \| Minimum
Share-based compensation
Year in which shares are vested	1 year
Share option exchange program \| Maximum
Share-based compensation
Year in which shares are vested	6 years
Share option exchange program \| RSUs
Number of Shares
RSUs exchanged in connection with the share option exchange program (in shares)	(7,954,526)	(7,954,526)
Share option exchange program \| Employee options
Weighted-Average Grant-Date Fair Value
RSUs exchanged in connection with the share option exchange program (in dollars per share) \| $ / shares	$ 3.96
Number of share options
Granted (in shares)	23,863,578
Share option exchange program \| Employees \| Employee options
Number of share options
Share options exchanged in connection with the share option exchange program		23,863,578
Weighted Average Exercise Price
Granted (in dollars per share) \| $ / shares		$ 3.96