Derivative Instruments (Summary Of The Effect Of Derivative Instruments On The Consolidated Statements Of Changes In Equity And Income) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2021		Sep. 30, 2020		Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 97		$ 141		$ 270	$ 475
Derivative, Gain (Loss) on Derivative, Net		1,261		(3,947)		(2,924)	(7,966)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(5,019)		(2,024)		(9,279)	(3,648)
Interest Expense		36,584		41,744		114,090	114,837
Other Income		8,091		182		9,802	8,171
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(4,962)		(2,037)		(9,074)	(4,103)
Cross Currency Swaps [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	(57)		13		(205)	455
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		143		(243)		(71)	424
Cross Currency Swap 2023 [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	[2]	97	[3]	141	[3]	270	475
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), Reclassification, before Tax		4,456		(3,827)		356	3,160
Interest Expense [Member] | Interest Rate Swap [Member]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		$ (3,338)		$ 123		$ (3,209)	$ (11,550)

[1] (1) Included in "Interest expense, net" in the accompanying consolidated statements of income (loss) and comprehensive income (loss) for the three and nine months ended September 30, 2021 and 2020.

[2] (2) Included in "Other income" in the accompanying consolidated statements of income (loss) and comprehensive income (loss) for the three and nine months ended September 30, 2021 and 2020.

[3] (3) Amounts represent derivative gains excluded from the effectiveness testing.