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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Balance at Dec. 31, 2019 $ 5,756,842 $ 3 $ 410,020 $ (38,397) $ 5,472,564 $ (87,348)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 3,814,229 0 0 0 3,814,229 0
Other comprehensive income, net of tax 369,804 0 0 0 0 369,804
Issuance of common stock 7,268 0 7,268 0 0 0
Stock compensation expense 41,556 0 41,556 0 0 0
Treasury Stock, Value, Acquired, Cost Method (100,004) 0 0 (100,004) 0 0
Stock Issued During Period, Value, Treasury Stock Reissued 8 0 (29,468) (38,494) (9,034) 0
Balance at Dec. 31, 2020 9,889,687 3 429,376 (99,907) 9,277,759 282,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 4,254,257 0 0 0 4,254,257 0
Other comprehensive income, net of tax (458,009) 0 0 0 0 (458,009)
Issuance of common stock (1,850) 0 (1,850) 0 0 0
Stock compensation expense 51,160 0 51,160 0 0 0
Treasury Stock, Value, Acquired, Cost Method (49,998)   0 (49,998) 0 0
Stock Issued During Period, Value, Treasury Stock Reissued 11 0 (36,953) (43,615) (6,673) 0
Balance at Dec. 31, 2021 13,685,236 3 441,733 (106,290) 13,525,343 (175,553)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (3,627,535) 0 0 0 (3,627,535) 0
Other comprehensive income, net of tax (291,269) 0 0 0 0 (291,269)
Issuance of common stock (3,373) 0 (3,373) 0
Stock compensation expense 60,917 0 60,917 0 0 0
Treasury Stock, Value, Acquired, Cost Method (215,679) 0 0 (215,679) 0 0
Stock Issued During Period, Value, Treasury Stock Reissued 6,955 0 (51,823) (58,383) 395 0
Balance at Dec. 31, 2022 $ 9,615,252 $ 3 $ 447,454 $ (263,586) $ 9,898,203 $ (466,822)