Fair Value Disclosures (Assets and Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Rental properties held for sale, net	$ 3,895		$ 4,696
Fair Value, Measurements, Recurring [Member]
Rental properties held for sale, net	3,895
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Rental properties held for sale, net	3,895
Fair Value, Measurements, Recurring [Member] | Cross Currency Swaps [Member]
Derivatives measured at fair value on a recurring basis	(996)	[1]
Fair Value, Measurements, Recurring [Member] | Cross Currency Swaps [Member] | Quoted Prices In Active Markets For Identical Assets (Level I) [Member]
Derivatives measured at fair value on a recurring basis	0	[1]
Fair Value, Measurements, Recurring [Member] | Cross Currency Swaps [Member] | Significant Other Observable Inputs (Level 2) [Member]
Derivatives measured at fair value on a recurring basis	(996)	[1]
Fair Value, Measurements, Recurring [Member] | Cross Currency Swaps [Member] | Significant Unobservable Inputs (Level 3) [Member]
Derivatives measured at fair value on a recurring basis	0	[1]
Fair Value, Measurements, Recurring [Member] | Currency Forward Agreements [Member]
Derivatives measured at fair value on a recurring basis	(2,535)	[1]
Fair Value, Measurements, Recurring [Member] | Currency Forward Agreements [Member] | Quoted Prices In Active Markets For Identical Assets (Level I) [Member]
Derivatives measured at fair value on a recurring basis	0	[1]
Fair Value, Measurements, Recurring [Member] | Currency Forward Agreements [Member] | Significant Other Observable Inputs (Level 2) [Member]
Derivatives measured at fair value on a recurring basis	(2,535)	[1]
Fair Value, Measurements, Recurring [Member] | Currency Forward Agreements [Member] | Significant Unobservable Inputs (Level 3) [Member]
Derivatives measured at fair value on a recurring basis	0	[1]
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Derivatives measured at fair value on a recurring basis	(994)	[1]
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member] | Quoted Prices In Active Markets For Identical Assets (Level I) [Member]
Derivatives measured at fair value on a recurring basis	0	[1]
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member] | Significant Other Observable Inputs (Level 2) [Member]
Derivatives measured at fair value on a recurring basis	(994)	[1]
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member] | Significant Unobservable Inputs (Level 3) [Member]
Derivatives measured at fair value on a recurring basis	$ 0	[1]

[1] Included in "Accounts payable and accrued liabilities" in the accompanying consolidated balance sheet.