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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Total | Common stock | Additional paid-in capital | Retained earnings | Unrealized investment losses: | Change in unrealized gains on securities without an allowance for expected credit losses | Change in unrealized (losses) gains on securities with an allowance for expected credit losses | Currency translation adjustments: | Accumulated Other Comprehensive Income (Loss) | Treasury stock | Noncontrolling interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment resulting from changes in accounting principles |  | $ 158,705 | $ 964,789 | $ 11,040,908 | $ (586,354) |  |  | $ (339,484) | $ (925,838) | $ (3,783,133) | $ 13,806
Beginning of period at Dec. 31, 2023 |  | 158,705 | 964,789 | 11,040,908 | (586,354) |  |  | (339,484) | (925,838) | (3,783,133) | 13,806
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (30,075) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 38,318 |  |  |  |  |  |  |  |
Net income before noncontrolling interests | $ 1,179,234 |  |  | 1,180,014 |  |  |  |  |  |  | (780)
Dividends ($0.09, $0.33, $0.76 and $0.81 per share, respectively) |  |  |  | (311,514) |  |  |  |  |  |  |
Change in unrealized gains on securities without an allowance for expected credit losses | 297,533 |  |  |  |  | $ 293,064 |  |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | $ 4,470 |  |  |  |
Net change in period | 25,160 |  |  |  |  |  |  | 25,160 |  |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 9,488 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (236,243) |
Other | (1,849) |  |  |  |  |  |  |  |  |  |
(Distributions) contributions |  |  |  |  |  |  |  |  |  |  | 111
Other comprehensive (loss) income, net of tax | $ 322,693 |  |  |  | 297,533 |  |  | 25,160 | 322,693 |  | 1
End of period at Sep. 30, 2024 |  |  | 973,032 | 11,909,408 | (288,820) |  |  | (314,324) | (603,144) | (4,011,737) | 13,138
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Common stock dividends, per share, cash paid (in dollars per share) | $ 0.81 |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment resulting from changes in accounting principles |  | 158,705 | 986,892 | 11,669,567 | (669,813) |  |  | (363,827) | (1,033,640) | (4,007,742) | 13,269
Beginning of period at Jun. 30, 2024 |  | 158,705 | 986,892 | 11,669,567 | (669,813) |  |  | (363,827) | (1,033,640) | (4,007,742) | 13,269
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (26,930) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 13,070 |  |  |  |  |  |  |  |
Net income before noncontrolling interests | $ 365,314 |  |  | 365,634 |  |  |  |  |  |  | (320)
Dividends ($0.09, $0.33, $0.76 and $0.81 per share, respectively) |  |  |  | (125,793) |  |  |  |  |  |  |
Change in unrealized gains on securities without an allowance for expected credit losses | 380,993 |  |  |  |  | 369,827 |  |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | 11,166 |  |  |  |
Net change in period | 49,503 |  |  |  |  |  |  | 49,503 |  |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 8,164 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (12,480) |
Other | 321 |  |  |  |  |  |  |  |  |  |
(Distributions) contributions |  |  |  |  |  |  |  |  |  |  | 189
Other comprehensive (loss) income, net of tax | $ 430,496 |  |  |  | 380,993 |  |  | 49,503 | 430,496 |  | 0
End of period at Sep. 30, 2024 |  |  | 973,032 | 11,909,408 | (288,820) |  |  | (314,324) | (603,144) | (4,011,737) | 13,138
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Common stock dividends, per share, cash paid (in dollars per share) | $ 0.33 |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment resulting from changes in accounting principles |  |  | 973,032 | 11,909,408 | (288,820) |  |  | (314,324) | (603,144) | (4,011,737) | 13,138
Cumulative effect adjustment resulting from changes in accounting principles | $ 8,407,439 | 158,705 | 984,825 | 12,265,070 | (517,170) |  |  | (417,099) | (934,269) | (4,079,220) | 12,328
Beginning of period at Dec. 31, 2024 | 8,407,439 | 158,705 | 984,825 | 12,265,070 | (517,170) |  |  | (417,099) | (934,269) | (4,079,220) | 12,328
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (41,630) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 38,622 |  |  |  |  |  |  |  |
Net income before noncontrolling interests | 1,330,028 |  |  | 1,329,892 |  |  |  |  |  |  | 136
Dividends ($0.09, $0.33, $0.76 and $0.81 per share, respectively) |  |  |  | (288,365) |  |  |  |  |  |  |
Change in unrealized gains on securities without an allowance for expected credit losses | 340,451 |  |  |  |  | 364,144 |  |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | (23,694) |  |  |  |
Net change in period | 87,663 |  |  |  |  |  |  | 87,663 |  |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 11,012 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (73,829) |
Other | (34) |  |  |  |  |  |  |  |  |  |
(Distributions) contributions |  |  |  |  |  |  |  |  |  |  | (6,352)
Other comprehensive (loss) income, net of tax | 428,114 |  |  |  | 340,451 |  |  | 87,663 | 428,114 |  | (1)
End of period at Sep. 30, 2025 | $ 9,805,003 |  | 981,817 | 13,306,597 | (176,720) |  |  | (329,436) | (506,156) | (4,142,071) | 6,111
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Common stock dividends, per share, cash paid (in dollars per share) | $ 0.76 |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment resulting from changes in accounting principles |  | 158,705 | 1,005,428 | 12,829,755 | (248,633) |  |  | (323,751) | (572,384) | (4,126,967) | 10,271
Beginning of period at Jun. 30, 2025 |  | $ 158,705 | 1,005,428 | 12,829,755 | (248,633) |  |  | (323,751) | (572,384) | (4,126,967) | 10,271
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (36,745) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 13,134 |  |  |  |  |  |  |  |
Net income before noncontrolling interests | $ 511,969 |  |  | 511,032 |  |  |  |  |  |  | 937
Dividends ($0.09, $0.33, $0.76 and $0.81 per share, respectively) |  |  |  | (34,190) |  |  |  |  |  |  |
Change in unrealized gains on securities without an allowance for expected credit losses | 71,913 |  |  |  |  | $ 95,534 |  |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | $ (23,621) |  |  |  |
Net change in period | (5,685) |  |  |  |  |  |  | (5,685) |  |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 9,176 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (24,627) |
Other | 347 |  |  |  |  |  |  |  |  |  |
(Distributions) contributions |  |  |  |  |  |  |  |  |  |  | (5,097)
Other comprehensive (loss) income, net of tax | 66,228 |  |  |  | 71,913 |  |  | (5,685) | 66,228 |  | 0
End of period at Sep. 30, 2025 | $ 9,805,003 |  | 981,817 | 13,306,597 | (176,720) |  |  | (329,436) | (506,156) | (4,142,071) | 6,111
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Common stock dividends, per share, cash paid (in dollars per share) | $ 0.09 |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment resulting from changes in accounting principles | $ 9,805,003 |  | $ 981,817 | $ 13,306,597 | $ (176,720) |  |  | $ (329,436) | $ (506,156) | $ (4,142,071) | $ 6,111

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