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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Jun. 30, 2015
Dec. 31, 2015
Subsequent Event [Line Items]        
Dividends       $ 0.08
Fair Value Hedging [Member] | Senior Notes, Due 2020 [Member]        
Subsequent Event [Line Items]        
Derivative, Notional Amount Monetized     $ 75.0  
Fair Value Hedging [Member] | Senior Notes, Due 2022 [Member]        
Subsequent Event [Line Items]        
Derivative, Notional Amount Monetized $ 80.0 $ 45.0    
Interest Rate Swap [Member] | Fair Value Hedging [Member]        
Subsequent Event [Line Items]        
Capitalized loss on monetization $ 0.5   $ 0.7