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Taxes (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Earnings Before Taxes, Domestic $ 45,105 $ 37,363 $ 20,992
Earnings Before Taxes, Foreign 529,117 466,830 442,432
Earnings Before Taxes $ 574,222 $ 504,193 $ 463,424