Hedging Instruments (Schedule Of Fair Values And Balance Sheet Classifications Of Derivatives Designated As Hedging Instruments) (Details) - Derivatives and non-derivatives designated as hedging instruments - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Total derivative instruments presented as hedge instruments on the balance sheet	$ 8,233	$ 125
Gross amounts subject to master netting arrangements not offset on the balance sheet	(1,630)	(125)
Net amount	6,603	0
Total hedging instruments presented on the balance sheet	105,253	124,339
Gross amounts subject to master netting arrangements not offset on the balance sheet	(1,630)	(125)
Net amount	103,623	124,214
Non-derivative foreign currency denominated debt designated as net investment hedge on the balance sheet | Long-term debt
Derivatives, Fair Value [Line Items]
Total hedging instruments presented on the balance sheet	103,555	109,125
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Total hedging instruments presented on the balance sheet	1,698	15,214
Cash Flow Hedging | Foreign currency exchange contracts | Other current assets
Derivatives, Fair Value [Line Items]
Total derivative instruments presented as hedge instruments on the balance sheet	3,996	125
Cash Flow Hedging | Foreign currency exchange contracts | Other long-term assets
Derivatives, Fair Value [Line Items]
Total derivative instruments presented as hedge instruments on the balance sheet	1,079	0
Cash Flow Hedging | Foreign currency exchange contracts | Accrued liabilities
Derivatives, Fair Value [Line Items]
Total hedging instruments presented on the balance sheet	1,686	12,373
Cash Flow Hedging | Foreign currency exchange contracts | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Total hedging instruments presented on the balance sheet	12	0
Cash Flow Hedging | Cross currency swaps | Other long-term assets
Derivatives, Fair Value [Line Items]
Total derivative instruments presented as hedge instruments on the balance sheet	3,158	0
Cash Flow Hedging | Cross currency swaps | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Total hedging instruments presented on the balance sheet	$ 0	$ 2,841