Notes Payable and Unsecured Credit Facilities (Tables)

3 Months Ended

Mar. 31, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The Company’s outstanding debt at March 31, 2013 and December 31, 2012 consists of the following (in thousands):

		2013	2012
Notes payable:
Fixed rate mortgage loans	$	475,443	461,914
Variable rate mortgage loans		11,960	12,041
Fixed rate unsecured loans		1,298,040	1,297,936
Total notes payable		1,785,443	1,771,891
Unsecured credit facilities		145,000	170,000
Total	$	1,930,443	1,941,891

Schedule of Maturities of Long-term Debt [Table Text Block]

As of March 31, 2013, scheduled principal payments and maturities on notes payable were as follows (in thousands):

Scheduled Principal Payments and Maturities by Year:		Scheduled Principal Payments	Mortgage Loan Maturities	Unsecured Maturities (1)		Total
2013	$	5,791	16,317	—		22,108
2014		7,383	26,912	150,000		184,295
2015		5,747	62,435	350,000		418,182
2016		5,487	21,661	145,000		172,148
2017		4,584	84,484	400,000		489,068
Beyond 5 Years		20,021	220,993	400,000		641,014
Unamortized debt (discounts) premiums, net		—	5,588	(1,960	)	3,628
Total	$	49,013	438,390	1,443,040		1,930,443

⁽¹⁾ Includes unsecured public debt and unsecured credit facilities balances outstanding as of March 31, 2013.