v2.4.0.6
Asset Acquisition (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended
Jun. 30, 2011
Feb. 28, 2011
Nov. 30, 2010
Oct. 31, 2010
Significant Acquisitions        
Asset acquisition, purchase price       $ 49.2
Asset acquisition, cash payments   8.0 41.1  
Asset acquisition, purchase price adjustment 0.5      
Asset acquisition, acquired property and equipment, amount       35.6
Asset acquisition, acquired intangible assets, amount       $ 13.6