Consolidated Statements of Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Dividends in excess of net income [Member]	Noncontrolling Interests - Unitholders in the Operating Partnership [Member]
Beginning balance at Dec. 31, 2011	$ 679,728	$ 393	$ 653,645	$ (28,007)	$ 53,697
Beginning balance, shares at Dec. 31, 2011	39,283,796	39,283,796
Net income	5,495			3,808	1,687
Conversion of operating partnership units, Shares		1,613
Conversion of operating partnership units			36		(36)
Issuance of restricted stock, Shares		2,000
Forfeiture of restricted stock, Shares		(2,253)
Dividends declared and paid	(24,226)			(16,500)	(7,726)
Stock-based compensation	1,406		1,406
Ending balance at Jun. 30, 2012	$ 662,403	$ 393	$ 655,087	$ (40,699)	$ 47,622
Ending balance, shares at Jun. 30, 2012	39,285,156	39,285,156