Derivative Instruments (Summary Of The Effect Of Derivative Instruments On The Consolidated Statements Of Changes In Equity And Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ 2,020		$ (3,027)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(476)		(539)
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(423)	[1]	(372)	[1]
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	291		(521)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(102)	[2]	(167)	[2]
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	1,935		(1,140)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	49		0
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (206)		$ (1,366)

[1] Included in "Interest expense, net" in the accompanying consolidated statements of income for the three months ended March 31, 2013 and 2012.

[2] Included in “Other expense” in the accompanying consolidated statements of income for the three months ended March 31, 2013 and 2012.