CONSOLIDATED STATEMENTS OF EQUITY - 9 months ended Sep. 30, 2017 - USD ($)	Series E Cumulative Redeemable Preferred Stock Preferred Stock	Series E Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series E Cumulative Redeemable Preferred Stock	Series F Cumulative Redeemable Preferred Stock Preferred Stock	Series F Cumulative Redeemable Preferred Stock Cumulative dividends and distributions	Series F Cumulative Redeemable Preferred Stock	Common Stock	Additional Paid In Capital	Retained Earnings	Cumulative dividends and distributions	Noncontrolling Interest in Consolidated Joint Venture	Total
Beginning Balance at Dec. 31, 2016	$ 115,000,000			$ 75,000,000			$ 2,201,000	$ 2,596,620,000	$ 786,901,000	$ (1,092,952,000)	$ 49,062,000	$ 2,531,832,000
Beginning Balance (in shares) at Dec. 31, 2016	4,600,000			3,000,000			220,073,140
Increase (Decrease) in Stockholders' Equity
Net proceeds from sale of common stock							$ 48,000	77,884,000				77,932,000
Number of shares of common stock sold (in shares)							4,876,855
Deferred stock compensation, net							$ 4,000	2,747,000				2,751,000
Deferred stock compensation, net (in shares)							371,665
Common stock distributions and distributions payable										(33,545,000)		(33,545,000)
Preferred stock dividends and dividends payable		$ (5,994,000)	$ (5,994,000)		$ (3,628,000)	$ (3,628,000)
Distributions to noncontrolling interest											(6,325,000)	(6,325,000)
Net income									125,980,000		6,344,000	132,324,000
Ending Balance at Sep. 30, 2017	$ 115,000,000			$ 75,000,000			$ 2,253,000	$ 2,677,251,000	$ 912,881,000	$ (1,136,119,000)	$ 49,081,000	$ 2,695,347,000
Ending Balance (in shares) at Sep. 30, 2017	4,600,000			3,000,000			225,321,660