SHARE-BASED COMPENSATION PLAN (Details 3) (Stock options, USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 0 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
employee
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Minimum
Dec. 31, 2011
Minimum
Dec. 31, 2013
Maximum
Dec. 31, 2011
Maximum
Dec. 31, 2013
Share Incentive Plan
Dec. 31, 2012
Share Incentive Plan
Dec. 31, 2011
Share Incentive Plan
Dec. 31, 2013
2011 Equity Incentive Plan
Dec. 31, 2012
2011 Equity Incentive Plan
Dec. 31, 2011
2011 Equity Incentive Plan
Nov. 09, 2012
Options granted under the merger and equal with VanceInfo
Nov. 09, 2012
Options granted under the merger and equal with VanceInfo
Minimum
Nov. 09, 2012
Options granted under the merger and equal with VanceInfo
Maximum
Nov. 09, 2012
VanceInfo 2005 Stock Option Plan
Dec. 31, 2013
VanceInfo 2005 Stock Option Plan
Dec. 31, 2012
VanceInfo 2005 Stock Option Plan
Nov. 09, 2012
VanceInfo 2007 Share Incentive Plan
Dec. 31, 2013
VanceInfo 2007 Share Incentive Plan
Dec. 31, 2012
VanceInfo 2007 Share Incentive Plan
Share options                                            
Balance at the beginning of the period (in shares)               115,259 554,381 1,361,483 215,084 34,055           1,093,310     2,426,615  
Granted (in shares)                   114,685 40,100 215,082 34,055       1,093,435     2,557,084    
Vested (in shares)               (26,017) (357,282) (704,248)   (34,055)           (1,093,310) (125)   (1,373,339) (81,381)
Forfeited (in shares)               (83,608) (81,840) (217,539) (30,001) (2)                 (458,385) (49,088)
Balance at the end of the period (in shares)               5,634 115,259 554,381 225,183 215,084 34,055           1,093,310   594,891 2,426,615
Vested and expect to vest at the end of the period (in shares)               4,593,188     245,616             1,093,435     2,049,611  
Weighted average grant-date fair value                                            
Balance at the beginning of the period (in dollars per share)               $ 7.63 $ 4.88 $ 2.51 $ 3.77 $ 4.32           $ 1.31     $ 6.23  
Granted (in dollars per share)                   $ 8.93 $ 3.75 $ 3.77 $ 4.32       $ 1.31     $ 6.18    
Vested (in dollars per share)               $ 1.39 $ 3.01 $ 1.67   $ 4.32           $ 1.31 $ 1.71   $ 8.32 $ 3.47
Forfeited (in dollars per share)               $ 4.91 $ 9.21 $ 4.18 $ 3.83 $ 3.89                 $ 6.58 $ 8.35
Balance at the end of the period (in dollars per share)               $ 5.76 $ 7.63 $ 4.88 $ 4.02 $ 3.77 $ 4.32           $ 1.31   $ 7.21 $ 6.23
Weighted-average exercise price per share                                            
Balance at the beginning of the period (in dollars per share)               $ 8.88 $ 6.56 $ 5.58 $ 7.25 $ 8.79           $ 1.90     $ 7.58  
Granted (in dollars per share)                   $ 16.74 $ 7.75 $ 7.25 $ 8.79       $ 1.90     $ 7.56    
Vested (in dollars per share)               $ (8.49) $ 5.79 $ 5.30   $ 8.79           $ 1.90 $ 3.50   $ 8.09 $ 6.57
Forfeited (in dollars per share)               $ 11.26 $ 6.64 $ 9.76 $ 8.20 $ 7.60           $ 6.95     $ 7.87 $ 7.96
Balance at the end of the period (in dollars per share)               $ 8.47 $ 8.88 $ 6.56 $ 7.25 $ 7.25 $ 8.79           $ 1.90   $ 7.90 $ 7.58
Vested and expect to vest at the end of the period (in dollars per share)               $ 4.32     $ 7.38             $ 1.90     $ 7.48  
Assumptions used to estimate fair value of awards                                            
Expected volatility, minimum (as a percent) 50.00%                         52.00%                
Expected volatility, maximum (as a percent) 51.00%                         66.00%                
Expected volatility, maximum (as a percent)   53.00% 53.00%                                      
Risk-free interest rate, minimum (as a percent) 1.18%   1.44%                     0.70%                
Risk-free interest rate, maximum (as a percent) 1.23%   2.90%                     1.40%                
Risk-free interest rate (as a percent)   1.04%                                        
Expected life   6 years 6 months   5 years 10 months 13 days 5 years 6 months 6 years 1 month 10 days 6 years 1 month 6 days                              
Exercise price (in dollars per share)   $ 7.25   $ 6.42 $ 8.79 $ 7.94 $ 22.18               $ 4.58 $ 11.00            
Fair value of the underlying common shares (in dollars per share)   $ 7.49   $ 6.42 $ 8.79 $ 7.94 $ 22.18             $ 7.49                
Unrecognized compensation expense                                            
Total unrecognized compensation expense related to share options granted (in dollars) $ 1,375                                          
Weighted-average period for recognition of compensation cost 1 year 2 months 26 days                                          
Fully vested share options of which contractual life is extended 281,804                                          
Number of employees who held fully vested share options with contractual life extended 140                                          
Additional compensation expense recognized $ 278