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Income Taxes (Details Textual 1) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Subsequent Event [Line Items]    
Foreign Earnings Repatriated   $ 252.0
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Foreign Earnings Repatriated $ 400.0