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Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Limited Partner [Member]
General Partner [Member]
AOCI Attributable to Noncontrolling Interest [Member]
Noncontrolling Interests-Consolidated Real Estate Entities [Member]
Redeemable Common Stock [Member]
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
General Partner [Member]
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
AOCI Attributable to Noncontrolling Interest [Member]
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Distributions in Excess Of Net Income [Member]
Accumulated Distributions in Excess Of Net Income [Member]
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Noncontrolling Interests Operating Partnership [Member]
Noncontrolling Interests-Consolidated Real Estate Entities [Member]
Redeemable Common Stock [Member]
Beginning Balance at Dec. 31, 2017 $ 6,573,894               $ 9 $ 1,134 $ 7,121,112 $ (784,500)   $ 2,157   $ 231,676 $ 2,306 $ 10,408
Beginning Balance, Shares at Dec. 31, 2017                 868,000 113,540,000                
Net income 231,022 $ 8,123                   222,899       8,123    
Other comprehensive Income (loss) - derivative instruments (2,689)     $ (2,689)                   $ (2,602)   (87)    
Issuance and registration of common shares (263)                 $ 1 (264)             1,482
Issuance and registration of common shares, Shares                   142,000                
Shares repurchased and retired (2,921)   $ (2,921)               (2,921)              
Shares repurchased and retired, Shares                   (34,000)                
Exercise of stock options 916   916               916              
Exercise of stock options, Shares                   18,000                
Shares issued in exchange for common units                   $ 1 4,443         (4,444)    
Shares issued in exchange for common units, Shares                   80,000                
Shares issued in exchange for redeemable stock 1,915   1,915     $ (1,915)         1,915             (1,915)
Redeemable stock fair market value adjustment 561   561     (561)           $ 561           (561)
Adjustment for noncontrolling interests in Operating Partnership   $ (153) $ 153               $ 66         $ (66)    
Cumulative adjustment due to adoption of ASU 2017-12                         $ (233)   $ 233      
Accounting Standards Update [Extensible List]   us-gaap:AccountingStandardsUpdate201712Member us-gaap:AccountingStandardsUpdate201712Member us-gaap:AccountingStandardsUpdate201712Member             us-gaap:AccountingStandardsUpdate201712Member us-gaap:AccountingStandardsUpdate201712Member   us-gaap:AccountingStandardsUpdate201712Member   us-gaap:AccountingStandardsUpdate201712Member    
Amortization of unearned compensation 12,903                   $ 12,903              
Dividends on preferred stock (3,688)                     $ (3,688)            
Dividends on common stock (424,302)                     (424,302)            
Dividends on noncontrolling interests units (15,159)                             $ (15,159)    
Ending Balance at Dec. 31, 2018 6,372,189               $ 9 $ 1,136 7,138,170 (989,263)   $ (212)   220,043 2,306 9,414
Ending Balance, Shares at Dec. 31, 2018                 868,000 113,746,000                
Partners' Capital at Dec. 31, 2017 6,573,875 $ 231,676 $ 6,270,758 $ 2,295 $ 2,306 10,408           66,840            
Net Income (Loss) Allocated to General Partners     219,211                              
Dividends, Preferred Stock, Cash 3,688                     3,688            
Issuance of units (264)   (264)     1,482                        
General partner units issued in exchange for limited partner units   (4,444) 4,444                              
Partners' Capital at Dec. 31, 2018             $ (233) $ 233                    
Amortization of unearned compensation 12,904   12,904                              
Dividends, Preferred Stock, Cash (3,688)                                  
Distributions to common unitholders (439,461) (15,159) (424,302)                              
Partners' Capital at Dec. 31, 2018 6,372,170 220,043 6,083,142 (161) 2,306 9,414           66,840            
Net income 366,618 12,671     136             353,811       12,671 136  
Other comprehensive Income (loss) - derivative instruments (13,423)     (13,423)                   (12,966)   (457)    
Issuance and registration of common shares 20,500                 $ 4 20,496             1,651
Issuance and registration of common shares, Shares                   338,000                
Shares repurchased and retired (3,724)   (3,724)               (3,724)              
Shares repurchased and retired, Shares                   (37,000)                
Exercise of stock options 2,881   2,881               2,881              
Exercise of stock options, Shares                   48,000                
Shares issued in exchange for common units                     2,366         (2,366)    
Shares issued in exchange for common units, Shares                   44,000                
Shares issued in exchange for redeemable stock 575   575     (575)         575             (575)
Redeemable stock fair market value adjustment (3,641)   (3,641)     3,641           (3,641)           3,641
Adjustment for noncontrolling interests in Operating Partnership 6,126 359 (359)   6,126           (816)         816    
Amortization of unearned compensation 14,684                   14,684              
Dividends on preferred stock (3,688)                     (3,688)            
Dividends on common stock (442,698)                     (442,698)            
Dividends on noncontrolling interests units (16,060)                             (16,060)    
Acquisition of noncontrolling interest (10,880)   (8,559)   (2,321)           (8,559)           (2,321)  
Contributions from noncontrolling interest 6,126                               6,126  
Ending Balance at Dec. 31, 2019 6,289,459               $ 9 $ 1,140 7,166,073 (1,085,479)   (13,178)   214,647 6,247 14,131
Ending Balance, Shares at Dec. 31, 2019                 868,000 114,139,000                
Net Income (Loss) Allocated to General Partners     350,123                              
Dividends, Preferred Stock, Cash 3,688                     3,688            
Issuance of units 20,500   20,500     1,651                        
General partner units issued in exchange for limited partner units   (2,366) 2,366                              
Partners' Capital at Dec. 31, 2019 6,289,440 214,647 6,015,290 (13,584) 6,247 14,131           66,840            
Amortization of unearned compensation 14,684   14,684                              
Dividends, Preferred Stock, Cash (3,688)                                  
Distributions to common unitholders (458,758) (16,060) (442,698)                              
Net income 264,015 9,053                   254,962       9,053    
Other comprehensive Income (loss) - derivative instruments 1,088     1,088                   1,050   38    
Issuance and registration of common shares (208)                 $ 1 (209)             1,629
Issuance and registration of common shares, Shares                   157,000                
Shares repurchased and retired (5,657)   (5,657)               (5,657)              
Shares repurchased and retired, Shares                   (55,000)                
Exercise of stock options $ 71   71               71              
Exercise of stock options, Shares 918                 1,000                
Shares issued in exchange for common units                     502         (502)    
Shares issued in exchange for common units, Shares                   10,000                
Redeemable stock fair market value adjustment $ 363   363     (363)           363           (363)
Adjustment for noncontrolling interests in Operating Partnership 3,601 63 (63)   3,601           (25)         25    
Amortization of unearned compensation 16,038                   16,038              
Dividends on preferred stock (3,688)                     (3,688)            
Dividends on common stock (460,340)                     (460,340)            
Dividends on noncontrolling interests units (16,334)                             (16,334)    
Contributions from noncontrolling interest 3,601                               3,601  
Ending Balance at Dec. 31, 2020 6,088,408               $ 9 $ 1,141 $ 7,176,793 (1,294,182)   $ (12,128)   $ 206,927 $ 9,848 $ 15,397
Ending Balance, Shares at Dec. 31, 2020                 868,000 114,252,000                
Net Income (Loss) Allocated to General Partners     251,274                              
Dividends, Preferred Stock, Cash 3,688                     3,688            
Issuance of units (208)   (208)     1,629                        
General partner units issued in exchange for limited partner units   (502) 502                              
Partners' Capital at Dec. 31, 2020 6,088,389 206,927 5,817,270 $ (12,496) $ 9,848 $ 15,397           $ 66,840            
Amortization of unearned compensation 16,038   16,038                              
Dividends, Preferred Stock, Cash (3,688)                                  
Distributions to common unitholders $ (476,674) $ (16,334) $ (460,340)