Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Investments (Details 2)

v2.4.0.8
Cash, Cash Equivalents and Investments (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Jun. 30, 2014
item
Dec. 31, 2013
Available-for-sale securities    
Adjusted Cost $ 386,332 $ 361,183
Unrealized Gains 82 6
Unrealized Losses (138) (262)
Fair Value 386,276 360,927
Adjusted Cost    
Due in one year or less 271,638 255,278
Due after one year through three years 114,694 105,905
Total 386,332 361,183
Fair Value    
Due in one year or less 271,600 255,241
Due after one year through three years 114,676 105,686
Total 386,276 360,927
Number of owned securities that were in an unrealized loss position 98  
Unrealized losses deemed to be other-than-temporary 0  
Available-for-sale securities that have been in an unrealized loss position for twelve months or more 0  
Money Market Funds [Member]
    
Available-for-sale securities    
Adjusted Cost 91,195 98,437
Fair Value 91,195 98,437
Commercial Paper [Member]
    
Available-for-sale securities    
Adjusted Cost 78,684 101,773
Fair Value 78,684 101,773
Corporate Debt Securities [Member]
    
Available-for-sale securities    
Adjusted Cost 206,587 155,273
Unrealized Gains 82 6
Unrealized Losses (126) (258)
Fair Value 206,543 155,021
US Government Agencies Debt Securities [Member]
    
Available-for-sale securities    
Adjusted Cost 9,866 5,700
Unrealized Losses (12) (4)
Fair Value $ 9,854 $ 5,696