SHARE-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Assumptions Used to Estimate Fair Value

Assumptions used to determine the fair value of stock options granted during 2011, 2012 and 2013 are summarized in the following table:

 

    For the year ended December 31,  
    2011     2012     2013  
Weighted average grant date fair value per share   US$ 2.38     US$ 3.17     US$ 2.49  
Expected volatility     52 %     61 %     57 %
Expected dividends     -       -       -  
Expected life     2.71 years       2.62 years       2.31 years  
Risk-free interest rate (per annum)     0.93 %     0.34 %     0.33 %

 
Schedule of Stock Options Outstanding and Exercisable

The following table presents a summary of the Company's stock options (excluding the options granted to Expedia Asia Pacific) outstanding and exercisable at December 31, 2013:

 

    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		  
$  2.01 - $  4.00     59,058     $ 3.56       2.24       59,058     $ 3.56  
$  4.01 - $  6.00     367,822     $ 5.40       1.80       367,822     $ 5.40  
$  6.01 - $  8.00     812,104     $ 6.94       2.47       59,978     $ 6.76  
$  8.01 - $10.00     742,136     $ 8.54       3.67       13,624     $ 8.50  
$10.01 - $12.00     29,504     $ 10.93       2.57       -     $ -  
Total     2,010,624     $ 7.21       2.78       500,482     $ 5.43  

 
Schedule of Stock-Based Compensation Expense

Share-based compensation expense for the years ended December 31, 2011, 2012 and 2013 was included in cost of services and expense items as follows: 

    For the year ended December 31,  
    2011     2012     2013  
Cost of services     1,374,392       1,932,101       2,672,546  
Service development     7,625,962       11,459,551       19,563,206  
Sales and marketing     3,619,997       4,322,004       8,137,223  
General and administrative     9,302,013       12,234,867       32,965,113  
Total     21,922,364       29,948,523       63,338,088  

 
2001 Plan [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Stock Options Activity

A summary of stock option activity under the 2001 Plan for the year ended December 31, 2013 is as follows:

 

    Number
of
Ordinary
Shares		     Weighted
Average
Exercise
Price		     Weighted
Average
Remaining
Contractual
Term		     Aggregated
Intrinsic
Value (In
thousands)		  
Outstanding at December 31, 2012     22,736     US$ 1.53                  
Exercised     (21,732 )   US$ 1.53                  
Expired     (1,004 )   US$ 1.53                  
Outstanding at December 31, 2013     -     US$ -       -     US$ -  
Vested at December 31, 2013     -     US$ -       -     US$ -  
Exercisable at December 31, 2013     -     US$ -       -     US$ -  

 
2004 Plan [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Stock Options Activity

A summary of stock option activity under the 2004 Plan for the year ended December 31, 2013 is as follows:

 

    Number
of
Ordinary
Shares		     Weighted
Average
Exercise
Price		     Weighted
Average
Remaining
Contractual
Term		     Aggregated
Intrinsic
Value (In
thousands)		  
Outstanding at December 31, 2012     343,322     US$ 5.86                  
Exercised     (84,546 )   US$ 4.13                  
Forfeited     (3,752 )   US$ 5.33                  
Expired     (1,434 )   US$ 10.46                  
Outstanding at December 31, 2013     253,590     US$ 6.42       4.65 years     US$ 969  
Vested and expected to vest at December 31, 2013     238,590     US$ 6.27       4.50 years     US$ 948  
Exercisable at December 31, 2013     153,590     US$ 4.86       3.16 years     US$ 827  

 
2004 Plan [Member] | Equity-settled performance units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Performance Units Activity

A summary of equity-settled performance units activity under the 2004 Plan for the year ended December 31, 2013 is as follows:

 

 

    Number of Ordinary Shares     Weighted average
grant date fair value		  
Balance at December 31, 2012     143,596     US$ 3.86  
Settled     (105,216 )   US$ 3.85  
Forfeited     (35,259 )   US$ 3.97  
Balance at December 31, 2013     3,121     US$ 3.20  
Vested and expected to vest at December 31, 2013     3,121     US$ 3.20  

 
2004 Plan [Member] | Cash-settled performance units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Performance Units Activity

A summary of cash-settled performance units activity under the 2004 Plan for the year ended December 31, 2013 is as follows:

 

    Number of Ordinary Shares  
Balance at December 31, 2012     56,995  
Granted     32,004  
Settled     (17,701 )
Balance at December 31, 2013     71,298  

 
2009 Plan [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Stock Options Activity

A summary of stock option activity under the 2009 Plan for the year ended December 31, 2013 is as follows:

 

    Number
of Ordinary
Shares		     Weighted
Average
Exercise
Price		     Weighted
Average
Remaining
Contractual
Term		     Aggregated
Intrinsic
Value (In
thousands)		  
Outstanding at December 31, 2012     2,963,034     US$ 6.82                  
Granted     41,000     US$ 7.33                  
Exercised     (688,176 )   US$ 5.00                  
Forfeited     (551,188 )   US$ 7.50                  
Expired     (7,636 )   US$ 8.19                  
Outstanding at December 31, 2013     1,757,034     US$ 7.32       2.51 years     US$ 5,146  
Vested and expected to vest at December 31, 2013     1,599,742     US$ 7.32       2.51 years     US$ 4,689  
Exercisable at December 31, 2013     346,892     US$ 5.68       1.28 years     US$ 1,580  

 
2009 Plan [Member] | Equity-settled performance units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Performance Units Activity

A summary of equity-settled performance units activity under the 2009 Plan for the year ended December 31, 2013 is as follows:

 

    Number of Ordinary Shares     Weighted average
grant date fair value		  
Balance at December 31, 2012     1,884,768     US$ 7.96  
Granted     6,566,627     US$ 8.18  
Settled     (614,688 )   US$ 7.81  
Forfeited     (363,027 )   US$ 7.95  
Balance at December 31, 2013     7,473,680     US$ 8.17  
Vested and expected to vest at December 31, 2013     6,280,805     US$ 8.17