Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Debt

		Weighted Average
		Interest Rate at			Balance at December 31,
(Amounts in thousands)		December 31, 2014			2014		2013
Mortgages Payable:
	Fixed rate		4.45%	$	7,710,931	$	7,563,133
	Variable rate		2.20%		1,840,769		768,860
			4.02%	$	9,551,700	$	8,331,993
Unsecured Debt:
	Senior unsecured notes		3.89%	$	1,347,159	$	1,350,855
	Unsecured revolving credit facilities		-		-		295,870
			3.89%	$	1,347,159	$	1,646,725

Schedule of Maturities of Long-Term Debt Table Text Block

				Senior Unsecured
				Debt and
(Amounts in thousands)				Revolving Credit
Year Ending December 31,		Mortgages Payable		Facilities
2015	$	433,699	$	500,000
2016		1,552,419		-
2017		626,525		-
2018		340,442		-
2019		996,579		450,000
Thereafter		5,601,148		400,000