Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation (Details Textual)

v2.4.0.6
Share Based Compensation (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Y
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Share Based Compensation (Textuals) [Abstract]        
Total fair value of awards vested $ 6.9 $ 8.7    
Share Based Compensation (Additional Textuals) [Abstract]        
Typical vesting rate for options granted Over three years      
Cash received for exercises of stock options     1.8 0.4
Tax benefit realized from stock option exercises     0.3 0
Exercise of stock option     426,000  
Award vested as of grant date 100.00%      
Granted, weighted average grant date fair value per share $ 6.71 $ 6.27    
Total unrecognized compensation cost related to nonvested awards $ 35.8   $ 35.8  
Weighted-average expense recognition period 1.7      
Common stock authorized for issuance 79,000,000   79,000,000  
Common stock outstanding 37,000,000      
Common stock available for future grants 42,000,000   42,000,000  
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