Consolidated Balance Sheet Going Concern Basis (Parenthetical) (USD $)	Dec. 31, 2013
Investments in real estate, variable interest entities	$ 614,420,000
Cash and cash equivalents, variable interest entities	112,512,000
Restricted cash held in escrows, variable interest entities	13,372,000
Allowances on accounts receivable	414,000
Lease intangibles, variable interest entities	49,866,000
Mortgage loans payable, variable interest entities	90,404,000
Notes payable, variable interest entities	1,742,000
Below market lease intangibles, variable interest entities	2,399,000
Series D Cumulative Redeemable Preferred Shares, liquidation preference	$ 25
Series D Cumulative Redeemable Preferred Shares, shares authorized	5,060,000
Series D Cumulative Redeemable Preferred Shares, shares issued	4,820,000
Series D Cumulative Redeemable Preferred Shares, shares outstanding	4,820,000
Common Shares, par value	$ 1
Common Shares, shares authorized		[1]
Common Shares, shares issued	36,401,438
Common Shares, shares outstanding	36,401,438
Variable Interest Entities [Member]
Investments in real estate, variable interest entities	65,275,000
Cash and cash equivalents, variable interest entities	1,163,000
Restricted cash held in escrows, variable interest entities	7,340,000
Lease intangibles, variable interest entities	20,043,000
Notes payable, variable interest entities	942,000
Below market lease intangibles, variable interest entities	$ 527,000

[1] Unlimited