XML 69 R68.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock-Based Compensation (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Year
Dec. 31, 2010
Year
Dec. 31, 2009
Year
Stock option activity      
Outstanding as of December 31, 2010, Shares 4,318    
Outstanding as of December 31, 2010, Weighted-Average Exercise Price $ 20.05    
Granted, Shares 1,769    
Granted, Weighted-Average Exercise Price $ 31.83    
Exercised, Shares (1,501)    
Exercised, Weighted-Average Exercise Price $ 20.67    
Forfeited or expired, Shares (113)    
Forfeited or expired, Weighted-Average Exercise Price $ 22.26    
Outstanding as of December 31, 2011, Shares 4,473 4,318  
Outstanding as of December 31, 2011, Weighted-Average Exercise Price $ 24.48 $ 20.05  
Outstanding as of December 31, 2011, Weighted-Average Remaining Contractual Term (in years) 7.5    
Outstanding as of December 31, 2011, Aggregate Intrinsic Value $ 50,680    
Exercisable as of December 31, 2011, Shares 1,187    
Exercisable as of December 31, 2011, Weighted-Average Exercise Price $ 20.51    
Exercisable as of December 31, 2011, Weighted-Average Remaining Contractual Term (in years) 4.8    
Exercisable as of December 31, 2011, Aggregate Intrinsic Value 18,211    
Weighted-average assumptions used in estimating the fair values of stock options granted      
Risk-free rate 2.90% 3.30% 3.30%
Expected dividend yield 1.10% 1.30% 1.40%
Expected volatility 43.00% 44.00% 43.00%
Expected term (in years) 5.5 5.3 4.8
Stock-based compensation expense      
Stock-based compensation expense 8,068 3,027 9,223
Product cost of revenue [Member]
      
Stock-based compensation expense      
Stock-based compensation expense 456 206 532
Service cost of revenue [Member]
      
Stock-based compensation expense      
Stock-based compensation expense 172 72 242
Research, development and engineering [Member]
      
Stock-based compensation expense      
Stock-based compensation expense 2,268 1,020 2,163
Selling, general, and administrative [Member]
      
Stock-based compensation expense      
Stock-based compensation expense $ 5,172 $ 1,729 $ 6,286