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Dividends (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
0 Months Ended 3 Months Ended
Mar. 30, 2012
Mar. 01, 2012
Mar. 31, 2012
Restricted Shareholders [Member]
Dividends [Line Items]      
Cash dividend per share   $ 0.04  
Total cash dividend $ 8.7    
Cash dividend paid 8.6    
Dividend paid upon restricted shares vest     $ 0.1