CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - Unaudited (USD $) In Thousands, unless otherwise specified	Common Stock	Additional Paid-in Capital	Distributions in Excess of Earnings	Noncontrolling Interest in Joint Ventures	Total
BEGINNING BALANCE at Dec. 31, 2011	$ 3	$ 619,386	$ (216,560)	$ 2,780	$ 405,609
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	5,403	119	5,522
Common dividends declared - per share	0	0	(14,775)	0	(14,775)
Stock-based compensation, net of forfeitures	0	1,492	0	0	1,492
Stock Issued During Period Value New Issues	0	17,516	0	0	17,516
Stock Issued During Period Value Dividend Reinvestment Plan	0	53	0	0	53
Withheld shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock	0	(812)	0	0	(812)
Distributions to noncontrolling interest	0	0	0	(85)	(85)
ENDING BALANCE at Mar. 31, 2012	$ 3	$ 637,635	$ (225,932)	$ 2,814	$ 414,520