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, 2012		Mar. 31, 2011
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (3,027)		$ (12,179)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(539)		(9,197)
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(372)	[1]	(4,722)	[1]
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(521)		(1,140)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(167)	[2]	(213)	[2]
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(1,140)		(6,914)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	0	[3]	(4,262)	[3]
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(1,366)		(4,125)
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(137)
Costs Associated With Loan Refinancing [Member] | Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	(4,600)
Gain On Sale Of Real Estate [Member] | Cross Currency Swaps [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	$ (4,300)

[1] Included in "Interest expense" in accompanying consolidated statements of income for the three months ended March 31, 2012. $4.6 million included in “Costs associated with loan refinancing or payoff, net” and $137 thousand included in “Interest expense” in accompanying consolidated statements of income for the three months ended March 31, 2011.

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

[3] $4.3 million included in "Gain on sale or acquisition of real estate" in the accompanying consolidated statements of income for the three months ended March 31, 2011.