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Unaudited Quarterly Data - Unaudited Quarterly Data (Parenthetical) (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Net Revenue [Member]      
Quarterly Information Data [Line Items]      
Decrease in previously reported quarterly results $ (1.9) $ (2.0) $ (1.7)
Direct Operating Expenses [Member]      
Quarterly Information Data [Line Items]      
Decrease in previously reported quarterly results $ (1.9) $ (2.0) $ (1.7)