v2.4.0.6
Stockholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended
May 31, 2011
Dec. 31, 2011
Dec. 31, 2010
Stockholder's Equity [Abstract]      
Common stock, shares issued 4,700,000 67,833,000 62,360,000
Common stock, shares issued, value $ 71.2