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Unaudited Consolidated Statement of Changes in Total Equity - USD ($)
shares in Thousands, $ in Thousands
Total
General Partner
Common Units
Limited Partners
Preferred Units
Limited Partners
Accumulated Other Comprehensive Income (Loss)
Non- controlling Interest
Preferred units Series A ($0.5625 per unit)
Preferred units Series A ($0.5625 per unit)
Preferred Units
Limited Partners
Preferred units Series B ($0.5313 per unit)
Preferred units Series B ($0.5313 per unit)
Preferred Units
Limited Partners
Beginning balance, units at Dec. 31, 2019     77,510 11,800            
Beginning balance at Dec. 31, 2019 $ 1,876,975 $ 50,241 $ 1,543,598 $ 285,159 $ (57,312) $ 55,289        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Net (loss) income (30,828) (789) (38,630) $ 6,425   2,166        
Other Comprehensive Income (Loss), Net of Tax (53,897)       (51,145) (2,752)        
Partners' Capital Account, Distributions 15,013 300 $ 14,713       $ 2,812 $ 2,812 $ 3,613 $ 3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units     35              
Partners' Capital Account, Unit-based Payment Arrangement, Amount 212 4 $ 208              
Other (note 10d) 462 12 $ 629     (179)        
Repurchase of common units (note 13), units     (1,373)              
Partners' Capital Account, Treasury Units, Purchased 15,635 313 $ 15,322              
Ending balance, units at Mar. 31, 2020     76,172 11,800            
Ending balance at Mar. 31, 2020 $ 1,702,551 47,839 $ 1,425,960 $ 285,159 (108,457) 52,050        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Common Stock, Dividends, Per Share, Declared $ 0.19                  
Preferred Stock, Dividends Per Share, Declared             $ 0.5625   $ 0.5313  
Beginning balance, units at Dec. 31, 2019     77,510 11,800            
Beginning balance at Dec. 31, 2019 $ 1,876,975 50,241 $ 1,543,598 $ 285,159 (57,312) 55,289        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Net (loss) income 18,455                  
Other Comprehensive Income (Loss), Net of Tax (62,069)                  
Ending balance, units at Jun. 30, 2020     86,928 11,800            
Ending balance at Jun. 30, 2020 1,718,487 45,868 $ 1,447,690 $ 285,159 (116,313) 56,083        
Beginning balance, units at Mar. 31, 2020     76,172 11,800            
Beginning balance at Mar. 31, 2020 1,702,551 47,839 $ 1,425,960 $ 285,159 (108,457) 52,050        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Net (loss) income 49,283 713 37,796 $ 6,425   4,349        
Other Comprehensive Income (Loss), Net of Tax (8,172)       (7,856) (316)        
Partners' Capital Account, Distributions 19,432 389 $ 19,043       $ 2,812 2,812 $ 3,613 3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units     6              
Partners' Capital Account, Unit-based Payment Arrangement, Amount 682 13 $ 669              
Partners' Capital Account, Sale of Units 0 (2,308) $ 2,308              
Repurchase of common units (note 13), units     10,750              
Ending balance, units at Jun. 30, 2020     86,928 11,800            
Ending balance at Jun. 30, 2020 $ 1,718,487 45,868 $ 1,447,690 $ 285,159 (116,313) 56,083        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Common Stock, Dividends, Per Share, Declared $ 0.25                  
Preferred Stock, Dividends Per Share, Declared             $ 0.5625   $ 0.5313  
Beginning balance, units at Dec. 31, 2020     86,951 11,800            
Beginning balance at Dec. 31, 2020 $ 1,746,270 46,182 $ 1,465,408 $ 285,159 (103,836) 53,357        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Net (loss) income 91,067 1,426 79,740 $ 6,425   3,476        
Other Comprehensive Income (Loss), Net of Tax 43,804       42,461 1,343        
Partners' Capital Account, Distributions 22,127 389 $ 21,738       $ 2,812 2,812 $ 3,613 3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units     13              
Partners' Capital Account, Unit-based Payment Arrangement, Amount 342 6 $ 336              
Ending balance, units at Mar. 31, 2021     86,964 11,800            
Ending balance at Mar. 31, 2021 $ 1,852,931 47,225 $ 1,523,746 $ 285,159 (61,375) 58,176        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Common Stock, Dividends, Per Share, Declared $ 0.25                  
Preferred Stock, Dividends Per Share, Declared             $ 0.5625   $ 0.5313  
Beginning balance, units at Dec. 31, 2020     86,951 11,800            
Beginning balance at Dec. 31, 2020 $ 1,746,270 46,182 $ 1,465,408 $ 285,159 (103,836) 53,357        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Net (loss) income 147,345                  
Other Comprehensive Income (Loss), Net of Tax 32,777                  
Ending balance, units at Jun. 30, 2021     86,984 11,800            
Ending balance at Jun. 30, 2021 1,864,314 47,613 $ 1,545,448 $ 285,159 (72,272) 58,366        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders (2,670)                  
Beginning balance, units at Mar. 31, 2021     86,964 11,800            
Beginning balance at Mar. 31, 2021 1,852,931 47,225 $ 1,523,746 $ 285,159 (61,375) 58,176        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Net (loss) income 56,278 823 46,040 $ 6,425   2,990        
Other Comprehensive Income (Loss), Net of Tax (11,027)       (10,897) (130)        
Partners' Capital Account, Distributions 25,449 447 $ 25,002       $ 2,812 $ 2,812 $ 3,613 $ 3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units     20              
Partners' Capital Account, Unit-based Payment Arrangement, Amount 676 12 $ 664              
Ending balance, units at Jun. 30, 2021     86,984 11,800            
Ending balance at Jun. 30, 2021 $ 1,864,314 $ 47,613 $ 1,545,448 $ 285,159 $ (72,272) $ 58,366        
Increase (Decrease) in Partners' Capital [Roll Forward]                    
Common Stock, Dividends, Per Share, Declared $ 0.2875                  
Preferred Stock, Dividends Per Share, Declared             $ 0.5625   $ 0.5313