Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Real estate properties:
Land	$ 165,325	$ 161,875
Buildings, improvements and lease intangibles	2,765,055	2,625,538
Personal property	9,217	8,739
Land held for development	17,054	25,171
Real estate properties, Total	2,956,651	2,821,323
Less accumulated depreciation	(610,402)	(580,617)
Total real estate properties, net	2,346,249	2,240,706
Cash and cash equivalents	7,160	6,776
Mortgage notes receivable	126,409	162,191
Assets held for sale and discontinued operations, net	9,084	3,337
Other assets, net	155,961	126,962
Total assets	2,644,863	2,539,972
Liabilities:
Notes and bonds payable	1,268,194	1,293,044
Accounts payable and accrued liabilities	57,610	65,678
Liabilities of discontinued operations	1,024	131
Other liabilities	59,706	60,175
Total liabilities	1,386,534	1,419,028
Commitments and contingencies
Equity:
Preferred stock, $.01 par value; 50,000 shares authorized; none issued and outstanding	0	0
Common stock, $.01 par value; 150,000 shares authorized; 95,873 and 87,514 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	959	875
Additional paid-in capital	2,324,140	2,100,297
Accumulated other comprehensive loss	(2,092)	(2,092)
Cumulative net income attributable to common stockholders	795,977	801,416
Cumulative dividends	(1,862,367)	(1,779,552)
Total stockholders’ equity	1,256,617	1,120,944
Noncontrolling interests	1,712	0
Total equity	1,258,329	1,120,944
Total liabilities and equity	$ 2,644,863	$ 2,539,972