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Income Taxes (Income (Loss) Before Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income before income taxes, equity in earnings in affiliates, and discontinued operations      
United States $ 155,844 $ 131,261 $ 130,205
Foreign 17,684 18,056 21,732
Income Before Income Taxes and Equity in Earnings of Affiliates $ 173,528 $ 149,317 $ 151,937