Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Company's Employee Share Option Activity

The following table summarizes the Company’s employee share option activity under the share option plans:

	Number of options			Weighted average exercise price		Weighted average grant date fair value		Weighted average remaining contractual term		Aggregate intrinsic value
				US$		US$		Years		US$
Outstanding, January 1, 2016		2,595,065			2.20		5.00		6.21		84,911
Granted		4,742,500			23.85		14.62
Exercised		(1,632,223	)		2.20
Forfeited		(2,883,750	)		23.66
Outstanding, December 31, 2016		2,821,592			16.66		11.87		8.15		24,329
Vested and expected to vest at December 31, 2016		2,739,893			16.48		11.79		8.12		24,102
Exercisable as of December 31, 2016		735,609			2.20		4.93		5.24		16,978

Schedule of Restricted Shares Activity

Restricted shares activity for the year ended December 31, 2016 was as follows:

	Number of shares			Weighted average grant date fair value
				US$
Outstanding, January 1, 2016		1,743,569			32.54
Granted		1,530,972			22.30
Vested		(610,431	)		31.11
Forfeited		(576,718	)		28.32
Outstanding, December 31, 2016		2,087,392			26.61
Expected to vest, December 31, 2016		2,006,935			26.66

Schedule of Estimated Fair Value of Share-Based Awards on Respective Grant Dates using Binomial Option Pricing Model

The Company calculated the estimated fair value of the share-based awards on the respective grant dates using the binomial option pricing model with the following assumptions:

	2014	2016
Fair value of ordinary share	US$36.62	US$23.76- US$24.88
Risk-free interest rates	2.909%	1.70%-1.75%
Expected exercise multiple	2.2	2.2-2.8
Expected volatility	53.5%	63%
Expected dividend yield	0.00%	0.00%
Weighted average fair value per option granted	US$34.52-US$34.59	US$14.12- US$15.26

Schedule of Share-Based Compensation Expenses

Share-based compensation expenses relating to options and restricted shares granted to employees recognized for the year ended December 31, 2014, 2015 and 2016 is as follows:

	Year ended December 31,
	2014		2015		2016
	RMB		RMB		RMB		US$
Cost of revenues		8,048		6,939		12,310		1,773
Sales and marketing expenses		14,644		36,584		50,814		7,319
General and administrative expenses		20,557		40,142		77,965		11,229
Product development expenses		13,417		24,280		54,304		7,821
		56,666		107,945		195,393		28,142