Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plans (Option Pricing Assumptions)

v2.4.0.6
Stock Incentive Plans (Option Pricing Assumptions)
12 Months Ended
Dec. 31, 2011
years
Dec. 31, 2010
years
Dec. 31, 2009
years
Stock Incentive Plans [Abstract]      
Expected life (in years) 5.2 5.8 5.8
Risk-free interest rate 0.90% 2.70% 2.20%
Expected volatility 49.90% 48.20% 50.90%
Expected dividend yield 0.00% 0.00% 0.00%