Consolidated Statement Of Changes In Equity (USD $)
In Thousands
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Dividends in Excess of Net Earnings [Member]
Noncontrolling Interests in Subsidiaries [Member]
Total
Balance, value at Dec. 31, 2010 $ 25,000 $ 796 $ 2,292,641 $ (560,165) $ 285,665 $ 2,043,937
Balance, shares at Dec. 31, 2010 10 79,605        
Net income       34,062 4,804 38,866
Preferred stock dividends       (1,000)   (1,000)
Common stock dividends       (78,293)   (78,293)
Common unit distributions         (11,558) (11,558)
Common stock offering, value   72 227,302     227,374
Common stock offering, shares   7,188        
Redemption of common units for common stock, value   2 4,419   (4,421)  
Redemption of common units for common stock, shares   202        
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value     92     92
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares   3        
Stock options exercised, value   1 1,462     1,463
Stock options exercised, shares   53        
Stock compensation     1,594     1,594
Rebalancing of ownership percent between parent and subsidiaries     (9,273)   9,273  
Balance, value at Jun. 30, 2011 $ 25,000 $ 871 $ 2,518,237 $ (605,396) $ 283,763 $ 2,222,475
Balance, shares at Jun. 30, 2011 10 87,051       Â