Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Real estate properties:
Land	$ 183,581	$ 178,931
Buildings, improvements and lease intangibles	3,014,422	2,861,935
Personal property	9,504	9,267
Land held for development	17,054	17,054
Real estate properties, Total	3,224,561	3,067,187
Less accumulated depreciation	(675,890)	(632,109)
Total real estate properties, net	2,548,671	2,435,078
Cash and cash equivalents	17,523	8,671
Mortgage notes receivable	4,858	125,547
Assets held for sale and discontinued operations, net	5,759	6,852
Other assets, net	173,299	153,514
Total assets	2,750,110	2,729,662
Liabilities:
Notes and bonds payable	1,397,027	1,348,459
Accounts payable and accrued liabilities	72,460	73,741
Liabilities of discontinued operations	1,041	1,112
Other liabilities	60,232	61,064
Total liabilities	1,530,760	1,484,376
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; 97,172 and 95,924 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	972	959
Additional paid-in capital	2,348,925	2,325,228
Accumulated other comprehensive loss	51	51
Cumulative net income attributable to common stockholders	818,185	808,362
Cumulative dividends	(1,948,783)	(1,891,123)
Total stockholders’ equity	1,219,350	1,243,477
Noncontrolling interests	0	1,809
Total equity	1,219,350	1,245,286
Total liabilities and equity	$ 2,750,110	$ 2,729,662