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Subsequent Events (details) - USD ($)
$ in Millions
12 Months Ended
Dec. 07, 2015
May. 31, 2017
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Payments to Acquire Equity Method Investments $ 2.0  
Scenario, Forecast [Member]    
Subsequent Event [Line Items]    
Payments to Acquire Equity Method Investments   $ 9.0