Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation (Details Textuals)

 v2.3.0.11
Share Based Compensation (Details Textuals) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2011
After May 2004 [Member]
Jun. 30, 2011
Prior to May 2004 [Member]
Jun. 30, 2011
Restricted stock awards [Member]
Jun. 30, 2010
Restricted stock awards [Member]
Share Based Compensation (Textuals) [Abstract]            
Options granted, term     7 years 10 years    
Total fair value of awards vested         $ 2.7 $ 0.3
Share Based Compensation (Additional Textuals) [Abstract]            
Typical vesting rate for options granted   Over three years        
Cash received for exercises of stock options   0.2        
Tax benefit realized from stock option exercises   0.1        
Exercise of stock option 0 (47,000)        
Award vested as of grant date   100.00%        
Granted, weighted average grant date fair value per share         $ 7.45 $ 5.64
Total unrecognized compensation cost related to nonvested awards   $ 18.9        
Weighted-average expense recognition period   1.5        
Common stock authorized for issuance   43,400,000        
Common stock outstanding   27,100,000        
Common stock available for future grants   16,300,000