v2.4.0.8
FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Auction rate securities    
Gross unrealized losses $ 0 $ 0
Twoo [Member]
    
Contingent consideration arrangment    
Fair Value of continegent consideration discount rate 15.00%  
Contingent Consideration, Current 7,100,000  
Contingent Consideration, Noncurrent 36,500,000  
Twoo [Member] | Maximum
    
Contingent consideration arrangment    
Discounted Liability in Fair Value Calculation of Contingent Consideration Arrangement 51,400,000.00  
Twoo [Member] | Minimum
    
Contingent consideration arrangment    
Discounted Liability in Fair Value Calculation of Contingent Consideration Arrangement 34,200,000.00  
Auction rate securities
    
Changes in assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)    
Balance at the beginning of the period, assets 8,100,000 5,870,000
Total net (losses) gains (realized and unrealized) included in other comprehensive income, assets 820,000 2,230,000
Settlements, assets    0
Balance at the end of the period, assets 8,920,000 8,100,000
Auction rate securities    
Cost Basis 10,000,000  
Gross unrealized losses 1,100,000 1,900,000
Contingent Consideration Arrangement
    
Changes in liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)    
Balance at the beginning of the period, liabilities 0 (10,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings (343,000)  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) (2,445,000)  
Fair value at date of acquisition, liabilities (40,837,000) 0
Settlements, liabilities 0 10,000,000
Balance at the end of the period, liabilities $ (43,625,000) $ 0