Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Real estate properties:
Land	$ 164,673	$ 161,875
Buildings, improvements and lease intangibles	2,637,030	2,625,538
Personal property	9,168	8,739
Land held for development	17,054	25,171
Real estate properties, Total	2,827,925	2,821,323
Less accumulated depreciation	(613,882)	(580,617)
Total real estate properties, net	2,214,043	2,240,706
Cash and cash equivalents	1,152	6,776
Mortgage notes receivable	212,313	162,191
Assets held for sale and discontinued operations, net	18,688	3,337
Other assets, net	151,194	126,962
Total assets	2,597,390	2,539,972
Liabilities:
Notes and bonds payable	1,301,387	1,293,044
Accounts payable and accrued liabilities	58,833	65,678
Liabilities of discontinued operations	280	131
Other liabilities	58,722	60,175
Total liabilities	1,419,222	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; 92,497 and 87,514 shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively	925	875
Additional paid-in capital	2,235,403	2,100,297
Accumulated other comprehensive loss	(2,092)	(2,092)
Cumulative net income attributable to common stockholders	776,212	801,416
Cumulative dividends	(1,833,613)	(1,779,552)
Total stockholders’ equity	1,176,835	1,120,944
Noncontrolling interests	1,333	0
Total equity	1,178,168	1,120,944
Total liabilities and equity	$ 2,597,390	$ 2,539,972