v2.4.0.6
Consolidated Statements Of Stockholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock [Member]
Preferred Stock [Member]
Additional Paid-In Capital [Member]
Dividends In Excess Of Earnings [Member]
Treasury Stock, At Cost [Member]
Accumulated Other Comprehensive Loss [Member]
Noncontrolling Interests [Member]
Equity, value at Dec. 31, 2011 $ 5,413,516 $ 1,481   $ 4,936,457 $ (53,080) $ (2,722) $ (16,138) $ 547,518
Equity, shares at Dec. 31, 2011   148,108,000            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Conversion of operating partnership units to Common Stock, shares   200,000            
Conversion of operating partnership units to Common Stock, value 0 2   6,024       (6,026)
Conversion of redeemable preferred units to common units 4,115             4,115
Allocated net income for the year 55,034       48,454     6,580
Dividends/distributions declared         (82,161)      
Sale of common stock, net of offering costs   1,049,000            
Issuance of 5.25% Series B cumulative redeemable preferred stock 109,330 11   109,319        
Shares issued pursuant to stock purchase plan, shares   4,000            
Shares issued pursuant to stock purchase plan, value 381     381        
Net activity from stock option and incentive plan, shares   23,000            
Net activity from stock option and incentive plan, value 11,590     2,004       9,586
Distributions to noncontrolling interests in property partnerships (750)             (750)
Amortization of interest rate contracts 649           580 69
Reallocation of noncontrolling interest       (3,659)       3,659
Equity, value at Mar. 31, 2012 5,501,640 1,494   5,050,526 (86,787) (2,722) (15,558) 554,687
Equity, shares at Mar. 31, 2012   149,384,000            
Equity, value at Dec. 31, 2012 5,634,854 1,516 0 5,222,073 (109,985) (2,722) (13,817) 537,789
Equity, shares at Dec. 31, 2012 151,601,209 151,601,000            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Conversion of operating partnership units to Common Stock, shares   9,000            
Conversion of operating partnership units to Common Stock, value 0 0   272       (272)
Allocated net income for the year 54,743       48,000     6,743
Dividends/distributions declared (110,158)       (98,712)     (11,446)
Issuance of 5.25% Series B cumulative redeemable preferred stock 194,371   200,000          
Issuance of 5.25% Series B cumulative redeemable preferred stock       (5,629)        
Shares issued pursuant to stock purchase plan, shares   3,000            
Shares issued pursuant to stock purchase plan, value 335     335        
Net activity from stock option and incentive plan, shares   27,000            
Net activity from stock option and incentive plan, value 20,806     4,262       16,544
Contributions from noncontrolling interests in property partnerships 10,421             10,421
Distributions to noncontrolling interests in property partnerships (750)             (750)
Amortization of interest rate contracts 628           564 64
Reallocation of noncontrolling interest 0     10,717       (10,717)
Equity, value at Mar. 31, 2013 $ 5,805,250 $ 1,516 $ 200,000 $ 5,232,030 $ (160,697) $ (2,722) $ (13,253) $ 548,376
Equity, shares at Mar. 31, 2013 151,639,524 151,640,000