ACQUISITIONS (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
1 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended
Jul. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jul. 31, 2011
Business team of China-based IT service firms
Dec. 31, 2011
Business team of China-based IT service firms
Feb. 01, 2011
Business team of China-based IT service firms
Feb. 01, 2011
Business team of China-based IT service firms
Contract backlog
Feb. 01, 2011
Business team of China-based IT service firms
Customer relationship
ACQUISITIONS                  
Cash consideration paid $ 9,004       $ 2,500        
Intangible assets acquired:                  
Intangible assets acquired               287 666
Goodwill   102,222 102,659 37,348     1,547    
Total consideration             2,500    
Estimated useful lives                  
Estimated useful lives               10 months 24 days 4 years 10 months 24 days
Pro forma financial information                  
Net revenues           219,197      
Net income           $ 17,715      
Net income per share                  
Basic (in dollars per share)           $ 0.44      
Diluted (in dollars per share)           $ 0.41