Disclosure about Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2010

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

Carrying amounts and estimated fair values of financial instruments

	December 31, 2010				December 31, 2009
	Carrying		Fair		Carrying		Fair
	Amount		Value		Amount		Value
Financial Assets:
Mortgage loans receivable	$	109,283	$	111,255	$	74,517	$	74,765
Other real estate loans receivable		327,297		333,003		352,846		354,429
Available-for-sale equity investments		1,103		1,103		5,816		5,816
Cash and cash equivalents		131,570		131,570		35,476		35,476
Financial Liabilities:
Borrowings under unsecured lines of credit arrangements	$	300,000	$	300,000	$	140,000	$	140,000
Senior unsecured notes		3,034,949		3,267,638		1,653,027		1,762,129
Secured debt		1,125,906		1,178,081		620,995		623,266
Interest rate swap agreements		482		482		2,381		2,381

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

	Fair Value Measurements as of December 31, 2010
	Total			Level 1		Level 2			Level 3
Available-for-sale equity investments(1)	$	1,103		$	1,103	$	—		$	—
Assets held for sale(2)		23,441			—		23,441			—
Interest rate swap agreements(3)		(482	)		—		(482	)		—
Totals	$	24,062		$	1,103	$	22,959		$	—

(1)	Unrealized gains or losses on equity investments are recorded in accumulated other comprehensive income (loss) at each measurement date.
(2)	Please see Note 5 for additional information.
(3)	Please see Note 11 for additional information.