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, unless otherwise specified
Total
Shares of Beneficial Interest at Par Value [Member]
Additional Paid in Capital [Member]
Distributions in Excess of Net Income Attributable to the Controlling Interests [Member]
Total Shareholders' Equity [Member]
Noncontrolling Interests in Subsidiaries [Member]
Balance at Dec. 31, 2012 $ 796,143 $ 664 $ 1,145,515 $ (354,122) $ 792,057 $ 4,086
Balance (in shares) at Dec. 31, 2012   66,437        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income attributable to the controlling interests 7,335     7,335 7,335  
Contributions from noncontrolling interests 213         213
Dividends (20,034)     (20,034) (20,034)  
Share grants, net of share grant amortization and forfeitures 1,169 1 1,168   1,169  
Share grants, net of share grant amortization and forfeitures (in shares)   48        
Balance at Mar. 31, 2013 $ 784,826 $ 665 $ 1,146,683 $ (366,821) $ 780,527 $ 4,299
Balance (in shares) at Mar. 31, 2013   66,485