Indebtedness (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

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

	Book Value at 12/31/2014		Book Value at 3/31/2015		Fair Value at 12/31/2014		Issuances and Assumptions		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 3/31/2015
Fixed rate secured debt	$	979,842	$	916,048	$	1,065,301	$	—	$	(63,151	)	$	(2,206	)	$	999,944
Variable rate secured debt	3,400		3,400		3,400		—		—			—			3,400
Unsecured debt	3,364,161		3,113,617		3,603,475		—		(250,544		)	25,551			3,378,482
Unsecured line of credit	106,000		453,000		106,000		347,000		—			—			453,000
Total	$	4,453,403	$	4,486,065	$	4,778,176	$	347,000	$	(313,695	)	$	23,345		$	4,834,826
Less secured debt related to real estate assets held-for-sale	40,764		41,697
Total indebtedness as reported on consolidated balance sheets	$	4,412,639	$	4,444,368

Unsecured Line of Credit

Description	Maximum Capacity		Maturity Date	Outstanding Balance at March 31, 2015
Unsecured Line of Credit - Partnership	$	1,200,000	January 2019	$	453,000