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
		Mar. 31, 2019		Mar. 31, 2018
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (6,589)		$ 9,939
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		138		0
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		909		541
Interest Expense		33,826		34,337
Other Income		344		630
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	775		(13)
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(311)		615
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	134		554
Cross Currency Swap 2023 [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(3,839)		0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	[2]	138	[3]	0
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		0		4,546
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	0		0
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (2,439)		$ 4,778

[1] (1)Included in "Interest expense, net" in the accompanying consolidated statements of income for the three months ended March 31, 2019 and 2018.

[2] Included in "Other income" in the accompanying consolidated statements of income for the three months ended March 31, 2019 and 2018.

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