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, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Expense		$ 133,124	$ 97,144	$ 79,915
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(7,861)	(5,602)	27,158
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(41)	(2,572)	392
Other income		3,095	9,039	3,629
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(2,498)	(5,235)	(2,004)
Fair value of derivatives in a liability position		100
Assets Needed for Immediate Settlement, Aggregate Fair Value		0
Cross Currency Swaps
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(793)	(754)	5,380
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	2,457	2,663	2,396
Currency Forward Agreements Member
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(9,547)	(2,804)	24,359
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	0	0	0
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ 2,479	$ (2,044)	$ (2,581)

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

[2] Included in “Other expense” or "Other income" in the accompanying consolidated statements of income.