Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation (Details Textual)

v2.3.0.15
Share Based Compensation (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2011
Y
D
business
segment
market
Sep. 30, 2010
Share Based Compensation (Additional Textuals) [Abstract]    
Typical vesting rate for options granted Over three years  
Cash received for exercises of stock options $ 0.4 $ 0.2
Tax benefit realized from stock option exercises 0.1 0.1
Exercise of stock option 99,000  
Award vested as of grant date 1.00%  
Granted, weighted average grant date fair value per share $ 6.27  
Total unrecognized compensation cost related to nonvested awards 32.2  
Weighted-average expense recognition period 2.0  
Common stock authorized for issuance 38,800,000  
Common stock outstanding 35,700,000  
Common stock available for future grants 3,100,000  
After May 2004 [Member]
   
Share Based Compensation (Textuals) [Abstract]    
Options granted, term P7Y  
Prior to May 2004 [Member]
   
Share Based Compensation (Textuals) [Abstract]    
Options granted, term P10Y  
Restricted stock awards [Member]
   
Share Based Compensation (Textuals) [Abstract]    
Total fair value of awards vested $ 8.7 $ 2.8
Share Based Compensation (Additional Textuals) [Abstract]    
Granted, weighted average grant date fair value per share $ 0 $ 6.20