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Allowance for Expected Credit Losses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]          
Decrease to retained earnings     $ (3,658,158) $ (3,670,543)  
Contract assets, allowance for credit loss as a percentage of assets     1.00%    
Trade receivables          
Beginning balance $ 73,829 $ 66,252 $ 73,829 $ 75,176 $ 53,412
Charges to cost and expenses, net of recoveries (79) 4,058      
Currency effects and other, net (1,268) 1,491      
Ending balance 73,829 66,252      
Contract assets          
Beginning balance 3,205 206      
Charges to cost and expenses, net of recoveries 0 0      
Currency effects and other, net (66) 72      
Ending balance 3,139 2,681      
Long-term Receivables          
Beginning balance 67,842 68,555      
Currency effects and other, net (1,059) (574)      
Ending balance 66,783 67,429      
ASU No. 2016-13 - Measurement of Credit Losses on Financial Instruments (Topic 326)          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Decrease to retained earnings         7,300
Trade receivables          
Beginning balance         $ 7,291
Contract assets          
Beginning balance   2,403      
Long-term Receivables          
Beginning balance $ 0 $ (552)