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Debt (Tables)
 12 Months Ended
Dec. 31, 2019
Debt Disclosure [Abstract]  
Schedule of Debt .    DEBT
Debt consisted of the following at December 31:
 
2019
 
2018
3.67% $50 million ten-year Senior Notes due December 17, 2022
$
50,000

 
$
50,000

4.10% $50 million ten-year Senior Notes due September 19, 2023
50,000

 
50,000

3.84% $125 million ten-year Senior Notes due September 19, 2024
125,000

 
125,000

4.24% $125 million ten-year Senior Notes due June 25, 2025
125,000

 
125,000

3.91% $75 million ten-year Senior Notes due June 25, 2029
75,000

 
—

1.47% EUR 125 million fifteen-year Senior Notes due June 17, 2030
140,197

 
143,053

1.30% EUR 135 million fifteen-year Senior Notes due November 6, 2034
151,413

 
—

Senior Notes debt issuance costs, net
(2,259
)
 
(1,234
)
Total Senior Notes
714,351

 
491,819

$1.1 billion Credit Agreement, interest at LIBOR plus 87.5 basis points(1)
520,999

 
493,202

Other local arrangements
55,868

 
49,670

Total debt
1,291,218

 
1,034,691

Less: current portion
(55,868
)
 
(49,670
)
Total long-term debt
$
1,235,350

 
$
985,021