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, 2017	Mar. 31, 2016
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (1,211)	$ (13,730)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(409)	(595)
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(1,071)	(1,314)
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(166)	(1,350)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	662	719
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(1,549)	(7,523)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		0	0
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ 504	$ (4,857)

[1] (1)Included in "Interest expense, net" in the accompanying consolidated statements of income for the three months ended March 31, 2017 and 2016.

[2] Included in "Other income" in the accompanying consolidated statements of income for the three months ended March 31, 2017 and 2016.