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Financing Arrangements (Narrative) (Details)
€ in Thousands
9 Months Ended
Sep. 30, 2022
USD ($)
May 31, 2023
USD ($)
Sep. 30, 2022
EUR (€)
Jul. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]          
Total unused credit lines and overdraft facilities $ 120,274,000        
Unsecured Debt | Scenario, Forecast          
Debt Instrument [Line Items]          
Amount due on long-term note   $ 15,438,000      
Unsecured Debt | Interest rate swap          
Debt Instrument [Line Items]          
Fixed interest rate swap 2.85%   2.85%    
Unsecured Debt | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Variable interest rate 1.20%        
Secured Debt          
Debt Instrument [Line Items]          
Amount due on long-term note       $ 15,375,000  
Long-term notes | Unsecured Debt          
Debt Instrument [Line Items]          
Amount due on long-term note $ 16,328,000        
U.S. line-of-credit          
Debt Instrument [Line Items]          
Line of credit 0       $ 0
Guarantees issued 3,244,000       2,478,000
U.S. line-of-credit | Letter of Credit          
Debt Instrument [Line Items]          
Borrowing capacity 75,000,000        
Euro line-of-credit          
Debt Instrument [Line Items]          
Line of credit 0       0
Guarantees issued 1,939,000       2,161,000
Euro line-of-credit | Letter of Credit          
Debt Instrument [Line Items]          
Borrowing capacity 48,987,000   € 50,000    
Euro overdraft facility          
Debt Instrument [Line Items]          
Line of credit 0       $ 0
Euro overdraft facility | Letter of Credit          
Debt Instrument [Line Items]          
Borrowing capacity $ 1,470,000   € 1,500