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		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (3,672)	$ (1,888)	$ (4,883)	$ (15,618)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(216)	(744)	(625)	(1,339)
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(913)	(1,339)	(1,984)	(2,653)
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(209)	(88)	(375)	(1,438)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	697	595	1,359	1,314
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(3,166)	(31)	(4,715)	(7,554)
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)		$ (297)	$ (1,769)	$ 207	$ (6,626)

[1] (1)Included in "Interest expense, net" in the accompanying consolidated statements of income for the three and six months ended June 30, 2017 and 2016.

[2] Included in "Other income" in the accompanying consolidated statements of income for the three and six months ended June 30, 2017 and 2016.