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ST Debt (Tables)
 6 Months Ended
Jun. 30, 2018
ST Debt [Abstract]  
Schedule of Short-term Debt [Table Text Block]
Short-term borrowings, including current portion of long-term debt, consists of the following:

 
 
June 30,
2018
 
December 31,
2017
3.00% notes, due 2018
 
$
—

 
$
299,857

Borrowings on lines of credit
 
70,000

 
—

Other short-term borrowings
 
44,908

 
56,949

 
 
$
114,908

 
$
356,806