Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation [Abstract]

Fair Value of Share Options, Valuation Assumptions

	Year ended December 31,
	2013	2014	2015
Risk-free interest rate	3.40% - 4.02%	3.96%~4.61%	3.11%~3.60%
Expected life (years)	6.35	5.85~6.35	5.75~6.35
Volatility	46.04% - 46.68%	44.28%~46.02%	40.87%~43.96%
Dividend yield	-	-	-

Summary of Share Options Activities

				Weighted average		Weighted average		Aggregate
				exercise price		remaining contractual		intrinsic value
	Number of options			per option		life (Years)		(in thousands)
Outstanding at December 31, 2014		9,183,990		$	10.57		6.61		257,557
Granted		283,750			30.45
Exercised		(2,283,226	)		8.37
Expired		(31,034	)		34.57
Forfeited		(875,161	)		20.67
Outstanding at December 31, 2015		6,278,319			10.75		5.71		238,374
Vested and exercisable at December 31, 2015		5,090,994			8.19		5.28		206,201
Vested and expect to vest at December 31, 2015		16,098,820			8.04		5.28		653,245

Summary of Nonvested Shares Activities

				Weighted average
				fair value per
	Number of			nonvested share
	nonvested shares			at the grant date
Outstanding at December 31, 2014		8,544,115		$	26.85
Granted		3,779,124			39.57
Vested		(3,568,506	)		19.31
Forfeited		(1,868,350	)		35.57
Outstanding at December 31, 2015		6,886,383			35.34
Vested and to be transferred to grantees at December 31, 2015		25,071,827
Vested and expect to vest at December 31, 2015		33,615,942