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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ 3,341	$ 9,690	$ (12,277)	$ 20,470
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(674)	172	(2,013)	316
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(1,317)	(490)	(3,970)	(1,375)
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		279	2,068	(1,159)	4,622
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	643	662	1,957	1,691
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		1,735	10,719	(5,819)	20,732
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		0	0	0	0
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ 1,327	$ (3,097)	$ (5,299)	$ (4,884)

[1] (1)Included in "Interest expense, net" in the accompanying consolidated statements of income for the three and nine months ended September 30, 2016 and 2015.

[2] Included in "Other income" in the accompanying consolidated statements of income for the three and nine months ended September 30, 2016 and 2015.