Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss By Component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance			$ (16,651)
Other comprehensive gain (loss) before reclassifications			130
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive gain (loss)	$ 1,466	$ 703	130	$ (4,533)
Accumulated other comprehensive loss, net of tax, ending balance	(16,521)		(16,521)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance			(8,375)
Other comprehensive gain (loss) before reclassifications			(1,708)
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive gain (loss)			(1,708)
Accumulated other comprehensive loss, net of tax, ending balance	(10,083)		(10,083)
Derivative instruments, net of tax [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance			(6,742)
Other comprehensive gain (loss) before reclassifications			1,582
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive gain (loss)			1,582
Accumulated other comprehensive loss, net of tax, ending balance	(5,160)		(5,160)
Other [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance			(1,534)
Other comprehensive gain (loss) before reclassifications			256
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive gain (loss)			256
Accumulated other comprehensive loss, net of tax, ending balance	$ (1,278)		$ (1,278)