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Income Taxes (Schedule Of U.S. And Foreign Components Of Income Before Income Taxes And Other Items) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Income Tax Disclosure [Abstract]      
United States $ 31,468 $ 37,877 $ 27,181
Foreign 137,770 134,701 131,286
Total $ 169,238 $ 172,578 $ 158,467