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Accrued Liabilities (Schedule Of Other Long-term Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accrued Liabilities, Current [Abstract]    
Accrued taxes $ 58,129 $ 60,313
Other accrued long-term expenses 26,914 25,291
Other long-term liabilities $ 85,043 $ 85,604