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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Total
Convertible non-voting common equivalent preferred shares
Non-cumulative preferred shares
Common shares
Additional paid-in capital
Retained earnings
Retained earnings
Cumulative Effect, Period of Adoption, Adjustment
Retained earnings
Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated other comprehensive income (loss)
Unrealized appreciation (decline) in value of available-for-sale investments, net of deferred income tax
Unrealized appreciation (decline) in value of available-for-sale investments, net of deferred income tax
Cumulative Effect, Period of Adoption, Adjustment
Unrealized appreciation (decline) in value of available-for-sale investments, net of deferred income tax
Cumulative Effect, Period of Adoption, Adjusted Balance
Foreign currency translation adjustments, net of deferred income tax
Common shares held in treasury, at cost
Balance at beginning of year at Dec. 31, 2017   $ 489,627 $ 872,555 $ 611 $ 1,230,617 $ 8,562,889   $ 8,712,683 $ 118,044 $ 157,400   $ 7,606 $ (39,356) $ (2,077,741)
Balance at beginning of year (Accounting Standards Update 2016-01) at Dec. 31, 2017             $ 149,794       $ (149,794)      
Preferred shares issued     0                      
Preferred shares redeemed     (92,555)                      
Preferred shares converted to common shares   (489,627)     489,608                  
Amortization of share-based compensation         55,920                  
Common shares issued, net       23                    
Other changes         17,636                  
Net income $ 727,821         727,821                
Net (income) loss attributable to noncontrolling interests 30,150         30,150                
Preferred share dividends (41,645)         (41,645)                
Loss on redemption of preferred shares (2,710)         (2,710)                
Unrealized holding gains (losses) during period, net of reclassification adjustment                   (125,484)        
Unrealized holding gains (losses) during period attributable to noncontrolling interests                   3,700        
Foreign currency translation adjustments (24,830)                       (24,830)  
Foreign currency translation adjustments attributable to noncontrolling interests                         (356)  
Shares repurchased for treasury (282,762)                         (304,426)
Balance at end of year at Dec. 31, 2018 9,439,827 0 780,000 634 1,793,781 9,426,299 0 9,426,299 (178,720) (114,178) 0 (114,178) (64,542) (2,382,167)
Non-redeemable noncontrolling interests 791,560                          
Total shareholders' equity 10,231,387                          
Preferred shares issued     0                      
Preferred shares redeemed     0                      
Preferred shares converted to common shares   0     0                  
Amortization of share-based compensation         64,152                  
Common shares issued, net       4                    
Other changes         31,750                  
Net income 1,693,300         1,693,300                
Net (income) loss attributable to noncontrolling interests (56,981)         (56,981)                
Preferred share dividends (41,612)         (41,612)                
Loss on redemption of preferred shares 0         0                
Unrealized holding gains (losses) during period, net of reclassification adjustment                   381,830        
Unrealized holding gains (losses) during period attributable to noncontrolling interests                   (9,166)        
Foreign currency translation adjustments 18,110                       18,110  
Foreign currency translation adjustments attributable to noncontrolling interests                         37  
Shares repurchased for treasury (2,871)                         (23,880)
Balance at end of year at Dec. 31, 2019 11,497,371 0 780,000 638 1,889,683 11,021,006 (22,500) $ 10,998,554 212,091 258,486 $ 0 $ 258,486 (46,395) (2,406,047)
Balance at end of year (Accounting Standards Update 2016-13) at Dec. 31, 2019             $ (22,452)              
Non-redeemable noncontrolling interests 762,777                          
Total shareholders' equity 12,260,148                          
Preferred shares issued     0                      
Preferred shares redeemed     0                      
Preferred shares converted to common shares   0     0                  
Amortization of share-based compensation         70,535                  
Common shares issued, net       5                    
Other changes         17,576                  
Net income 1,465,711         1,465,711                
Net (income) loss attributable to noncontrolling interests (60,190)         (60,190)                
Preferred share dividends (41,612)         (41,612)                
Loss on redemption of preferred shares 0         0                
Unrealized holding gains (losses) during period, net of reclassification adjustment                   252,530        
Unrealized holding gains (losses) during period attributable to noncontrolling interests                   (9,721)        
Foreign currency translation adjustments 33,336                       33,336  
Foreign currency translation adjustments attributable to noncontrolling interests                         659  
Shares repurchased for treasury (83,472)                         (97,862)
Balance at end of year at Dec. 31, 2020 13,105,886 $ 0 $ 780,000 $ 643 $ 1,977,794 $ 12,362,463     $ 488,895 $ 501,295     $ (12,400) $ (2,503,909)
Non-redeemable noncontrolling interests 823,007                          
Total shareholders' equity $ 13,928,893