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Subsequent Events Level 4 Subsequent Event - Secondary (Details) (Subsequent Event [Member], USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 1 Months Ended
Jul. 30, 2013
Jul. 30, 2013
Aug. 20, 2013
Subsequent Event [Member]
     
Subsequent Event [Line Items]      
Treasury Stock, Shares, Acquired   3,864,062  
Treasury Stock, Value, Acquired, Cost Method   $ 100.0  
Stock issued in secondary offering 10,000,000    
Revolving Credit Facility Amendment for Stock Repurchase     The Amendment permitted the consummation of the Repurchase in an amount not to exceed $100.0 million at any time prior to August 20, 2013.