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Goodwill and Other Intangibles Investment in West Atlantic (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]    
Equity Method Investments $ 13.1 $ 13.8
Investment in West Atlantic [Member]    
Schedule of Equity Method Investments [Line Items]    
Goodwill $ 5.5