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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Thousands
Total
Preferred shares
Common shares
Additional paid-in capital
Accumulated other comprehensive income (loss)
Unrealized gains (losses) on available for sale investments, net of tax:
Cumulative foreign currency translation adjustments, net of tax:
Retained earnings
Treasury shares, at cost
Balance at beginning of period at Dec. 31, 2019   $ 775,000 $ 2,206 $ 2,317,212 $ 171,710 $ 181,521 $ (9,811) $ 6,056,686 $ (3,778,806)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Shares repurchased   (225,000)              
Shares reissued       (18,695)         20,584
Share-based compensation expense       9,481          
Unrealized gains (losses) arising during the period, net of reclassification adjustment $ (253,904)         (253,904)      
Foreign currency translation adjustment (7,725)           (7,725)    
Net income (loss) (177,827)             (177,827)  
Preferred share dividends (1) [1]               (7,563)  
Common share dividends (1) [1]               (35,289)  
Shares repurchased                 (8,492)
Balance at end of period at Mar. 31, 2020 4,839,578 550,000 2,206 2,307,998 (89,919) (72,383) (17,536) 5,836,007 (3,766,714)
Balance at beginning of period at Dec. 31, 2020 5,295,694 550,000 2,206 2,330,054 414,395 420,635 (6,240) 5,763,607 (3,764,568)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Shares repurchased   0              
Shares reissued       (23,129)         24,274
Share-based compensation expense       9,222          
Unrealized gains (losses) arising during the period, net of reclassification adjustment (200,783)         (200,783)      
Foreign currency translation adjustment 1,249           1,249    
Net income (loss) 123,300             123,300  
Preferred share dividends (1) [1]               (7,563)  
Common share dividends (1) [1]               (36,494)  
Shares repurchased                 (9,380)
Balance at end of period at Mar. 31, 2021 $ 5,176,390 $ 550,000 $ 2,206 $ 2,316,147 $ 214,861 $ 219,852 $ (4,991) $ 5,842,850 $ (3,749,674)
[1] Refer to Note 9 'Shareholder's Equity' for details on dividends declared and paid related to the Company's common and preferred shares.