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, 2020	Mar. 31, 2019
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ 3,672	$ (6,589)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		162	138
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(259)	909
Interest Expense		34,753	33,963
Other Income		7,573	344
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(465)	775
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		1,139	(311)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	206	134
Cross Currency Swap 2023 [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		13,175	(3,839)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	[2],[3]	162	138
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (10,642)	$ (2,439)

[1] (1) Included in "Interest expense, net" in the accompanying consolidated statements of income and comprehensive income for the three months ended March 31, 2020 and 2019.

[2] (2) Included in "Other income" in the accompanying consolidated statements of income and comprehensive income for the three months ended March 31, 2020 and 2019.

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