Significant Accounting Policies Level 3 (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Significant Accounting Policies [Abstract]

Property, Plant and Equipment [Table Text Block]

The following table represents the components of properties in development as of December 31, 2011 and 2010 in the accompanying Consolidated Balance Sheets (in thousands):

		2011	2010
Construction in process	$	50,903	41,611
Construction complete and in lease-up		76,301	459,231
Land held for future development		96,873	110,090
Total	$	224,077	610,932

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

The following table represents the components of accounts receivable, net of allowance for doubtful accounts, as of December 31, 2011 and 2010 in the accompanying Consolidated Balance Sheets (in thousands):

		2011		2010
Tenant receivables	$	4,654		19,314
CAM and tax reimbursements		26,355		13,629
Other receivables		10,166		8,476
Less: allowance for doubtful accounts		(3,442	)	(4,819	)
Total	$	37,733		36,600