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Trade and Other Accounts Receivable, Net (Schedule Of Trade And Other Accounts Receivable, Net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Receivables [Abstract]    
Trade receivables $ 284,759 $ 289,737
Income and other tax receivables 40,708 34,465
Other 10,928 11,624
Trade and other accounts receivable, net $ 336,395 $ 335,826