Disclosure about Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Disclosure about Fair Value of Financial Instruments (Tables) [Abstract]

Carrying amounts and estimated fair values of financial instruments

		March 31, 2012				December 31, 2011
		Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
Financial assets:
	Mortgage loans receivable	$	63,625	$	64,288	$	63,934	$	64,194
	Other real estate loans receivable		235,243		236,195		228,573		231,308
	Available-for-sale equity investments		988		988		980		980
	Cash and cash equivalents		469,217		469,217		163,482		163,482
Financial liabilities:
	Borrowings under unsecured line of credit arrangements	$	5,000	$	5,000	$	610,000	$	610,000
	Senior unsecured notes		4,436,103		4,841,110		4,434,107		4,709,736
	Secured debt		2,353,856		2,468,979		2,112,649		2,297,278
	Interest rate swap agreements		2,205		2,205		2,854		2,854
	Foreign currency forward contract		555		555		0		0

The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis

	Fair Value Measurements as of March 31, 2012
	Total		Level 1		Level 2		Level 3
Available-for-sale equity investments(1)	$	988	$	988	$	0	$	0
Interest rate swap agreements(2)		(2,205)		0		(2,205)		0
Foreign currency forward contract(2)		(555)		0		(555)		0
Totals	$	(1,772)	$	988	$	(2,760)	$	0
(1) Unrealized gains or losses on equity investments are recorded in accumulated other comprehensive income (loss) at each measurement date.
(2) Please see Note 11 for additional information.