Fair Value Measurements (Details) (Recurring basis, USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Quoted Prices in Active Markets (Level 1)
   
Assets:    
Money market funds   $ 35,929
Marketable equity securities 1,486 1,489
Total 1,486 37,418
Significant Other Observable Inputs (Level 2)
   
Liabilities:    
Currency forward derivatives 558 532
Total 558 532
Significant Unobservable Inputs (Level 3)
   
Assets:    
Springbox Revenue Sharing 768  
Total 768  
Liabilities:    
Revenue earnouts 1,233 1,673
Total 1,233 1,673
Total Fair Value Measurements
   
Assets:    
Money market funds   35,929
Marketable equity securities 1,486 1,489
Springbox Revenue Sharing 768  
Total 2,254 37,418
Liabilities:    
Currency forward derivatives 558 532
Revenue earnouts 1,233 1,673
Total $ 1,791 $ 2,205