Indebtedness (Tables)

6 Months Ended

Jun. 30, 2011

Indebtedness

Fair Value, Liabilities Measured on a Recurring Basis, Disclosure Only

	Book Value at 12/31/10		Book Value at 6/30/11		Fair Value at 12/31/10		Issuances and Assumptions		Payoffs			Adjustments to Fair Value			Fair Value at 6/30/11
Fixed rate secured debt	$	1,042,722	$	1,164,138	$	1,069,562	$	129,831	$	(7,968	)	$	38,042		$	1,229,467
Variable rate secured debt		22,906		22,906		22,906		—		—			—			22,906
Fixed rate unsecured notes		2,948,405		2,906,154		3,164,651		—		(43,377	)		53,435			3,174,709
Unsecured lines of credit		193,046		18,329		193,224		283		(175,000	)		(390	)		18,117
Total	$	4,207,079	$	4,111,527	$	4,450,343	$	130,114	$	(226,345	)	$	91,087		$	4,445,199

Unsecured Lines of Credit

Description	Maximum Capacity		Maturity Date		Outstanding Balance at June 30, 2011
Unsecured Line of Credit - DRLP	$	850,000		February 2013	$	—
Unsecured Line of Credit - Consolidated Subsidiary	$	30,000		July 2012	$	18,329