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Financing Arrangements (Borrowings Under Existing Financing Arrangements) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Long-term notes $ 41,708 $ 45,378
Less: current portion (3,740) (3,671)
Total long-term debt $ 37,968 $ 41,707