SHARE-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2012

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Assumptions Used to Estimate Fair Value

	For the year ended December 31,
	2010			2011			2012
Weighted average grant date fair value per share	US$	2.20		US$	2.38		US$	3.17
Expected volatility		49	%		52	%		61	%
Expected dividends		-			-			-
Expected life		2.92 years			2.71 years			2.62 years
Risk-free interest rate (per annum)		1.15	%		0.93	%		0.34	%

Schedule of Stock Options Outstanding and Exercisable

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Ordinary Shares		Weighted Average Price Per Ordinary Share		Weighted Average Remaining Contractual Life (Years)		Ordinary Shares		Weighted Average Exercise Price Per Ordinary Share
$ 0.10 - $ 2.00		22,736	$	1.53		1.00		22,736	$	1.53
$ 2.01 - $ 4.00		349,342	$	3.24		1.72		349,342	$	3.24
$ 4.01 - $ 6.00		757,848	$	5.54		2.50		455,103	$	5.43
$ 6.01 - $ 8.00		1,207,328	$	6.92		3.36		98,459	$	6.79
$ 8.01 - $10.00		960,900	$	8.54		4.55		1,332	$	9.11
$10.01 - $12.00		30,938	$	10.91		3.54		1,434	$	10.46
Total		3,329,092	$	6.68		3.32		928,406	$	4.67

Schedule of Stock-Based Compensation Expense

	For the year ended December 31,
	2010		2011		2012
Cost of services		1,192,063		1,374,392		1,932,101
Service development		6,533,851		7,625,962		11,459,551
Sales and marketing		3,394,531		3,619,997		4,322,004
General and administrative		7,423,123		9,302,013		12,234,867
Total		18,543,568		21,922,364		29,948,523

2001 Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Stock Options Activity

	Number of Ordinary Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregated Intrinsic Value (In thousands)
Outstanding at December 31, 2011		24,852		US$	1.53
Exercised		(2,116	)	US$	1.53
Outstanding at December 31, 2012		22,736		US$	1.53		1.00 years	US$	134
Vested at December 31, 2012		22,736		US$	1.53		1.00 years	US$	134
Exercisable at December 31, 2012		22,736		US$	1.53		1.00 years	US$	134

2004 Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Stock Options Activity

	Number of Ordinary Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregated Intrinsic Value (In thousands)
Outstanding at December 31, 2011		706,922		US$	7.08
Exercised		(41,480	)	US$	5.18
Forfeited		(19,358	)	US$	5.59
Cancelled		(302,762	)	US$	8.82
Outstanding at December 31, 2012		343,322		US$	5.86		4.67 years	US$	679
Vested and expected to vest at December 31, 2012		325,150		US$	5.73		4.54 years	US$	673
Exercisable at December 31, 2012		232,703		US$	4.59		3.37 years	US$	661

2004 Plan [Member] | Equity-settled performance units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Performance Units Activity

	Number of Ordinary Shares			Weighted average grant date fair value
Balance at December 31, 2011		342,322		US$	4.01
Settled		(168,634	)	US$	4.12
Forfeited		(30,092	)	US$	4.08
Balance at December 31, 2012		143,596		US$	3.86
Vested and expected to vest at December 31, 2012		100,329		US$	3.84

2004 Plan [Member] | Cash-settled performance units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Performance Units Activity

	Number of Ordinary Shares
Balance at December 31, 2011		56,686
Granted		20,406
Settled		(20,097	)
Balance at December 31, 2012		56,995

2009 Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Stock Options Activity

	Number of Ordinary Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregated Intrinsic Value (In thousands)
Outstanding at December 31, 2011		3,657,749		US$	6.14
Granted		1,489,662		US$	8.30
Exercised		(462,986	)	US$	4.37
Forfeited		(531,404	)	US$	7.09
Cancelled		(1,158,984	)	US$	7.42
Expired		(31,003	)	US$	6.81
Outstanding at December 31, 2012		2,963,034		US$	6.82		3.18 years	US$	2,824
Vested and expected to vest at December 31, 2012		2,549,813		US$	6.75		3.15 years	US$	2,584
Exercisable at December 31, 2012		672,967		US$	4.80		1.97 years	US$	1,761

2009 Plan [Member] | Equity-settled performance units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Performance Units Activity

	Number of Ordinary Shares			Weighted average grant date fair value
Balance at December 31, 2011		112,144		US$	10.23
Granted		1,848,210		US$	7.88
Settled		(26,532	)	US$	10.27
Forfeited		(49,054	)	US$	8.56
Balance at December 31, 2012		1,884,768		US$	7.96
Vested and expected to vest at December 31, 2012		1,551,431		US$	7.96