Derivative Instruments (Summary Of The Effect Of Derivative Instruments On The Consolidated Statements Of Changes In Equity And Income) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Expense		$ 142,002	$ 135,870	$ 133,461
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(12,380)	18,529	(7,861)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		556	271	0
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		1,683	2,750	(41)
Other income		25,920	2,076	3,095
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	1,138	1,324	(2,498)
Cross Currency Swaps
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(450)	1,689	(793)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	545	1,426	2,457
Cross Currency Swap 2023 [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(4,454)	5,108	0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	[2],[3]	556	271	0
Currency Forward Agreements Member
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		0	8,560	(9,547)
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (7,476)	$ 3,172	$ 2,479

[1] Included in “Interest expense, net” in accompanying consolidated statements of income and comprehensive income.

[2] Included in "Other income" in the accompanying consolidated statements of income and comprehensive income.

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