Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Shareholders' Equity

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Consolidated Statements of Shareholders' Equity (USD $)
In Thousands, except Share data
Shares [Member]
Shares of Beneficial Interest at Par Value [Member]
USD ($)
Additional Paid in Capital [Member]
USD ($)
Distributions in Excess of Net Income Attributable to the Controlling Interests [Member]
USD ($)
Accumulated Other Comprehensive Income [Member]
USD ($)
Total Shareholders' Equity [Member]
USD ($)
Noncontrolling Interests in Subsidiaries [Member]
USD ($)
Total
USD ($)
Balance at Dec. 31, 2010   $ 659 $ 1,127,825 $ (269,935) $ (1,469) $ 857,080 $ 3,778 $ 860,858 [1]
Balance, shares at Dec. 31, 2010 65,870,000              
Comprehensive income:                
Net income attributable to the controlling interests       11,187   11,187   11,187
Net income attributable to noncontrolling interests             57 57
Change in fair value of interest rate hedge         833 833   833
Total comprehensive income           12,020 57 12,077
Distributions to noncontrolling interests             (107) (107)
Contributions from noncontrolling interest             1,279 1,279
Dividends       (57,386)   (57,386)   (57,386)
Shares issued under Dividend Reinvestment Program   1 2,643     2,644   2,644
Shares issued under Dividend Reinvestment Program, shares 83,000              
Share options exercised   1 1,087     1,088   1,088
Share options exercised, shares 43,000              
Share grants, net of share grant amortization and forfeitures     2,268     2,268   2,268
Share grants, net of share grant amortization and forfeitures, shares 21,000              
Balance at Jun. 30, 2011   $ 661 $ 1,133,823 $ (316,134) $ (636) $ 817,714 $ 5,007 $ 822,721
Balance, shares at Jun. 30, 2011 66,017,000              
[1] As adjusted (see note 3 to the consolidated financial statements)