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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common stocks | Additional Paid In Capital | Retained Earnings | Retained Earnings Cumulative Effect, Period Of Adoption, Adjustment | Accumulated Other Comprehensive (Loss) Income | Unrealized investment gains (losses | Unrealized investment gains (losses Cumulative Effect, Period Of Adoption, Adjustment | Currency Translation Adjustments | Treasury Stock | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning of period at Dec. 31, 2019 |  | $ 105,803 | $ 1,020,774 | $ 7,932,372 | $ (30,514) |  | $ 124,514 | $ 24,952 | $ (381,813) | $ (2,726,711) | $ 43,403
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (38,491) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 48,567 |  |  |  |  |  |  |  |
Change in controlling financial interest of a subsidiary |  |  | (53,635) |  |  |  |  |  |  |  |
Change in unrealized (losses) gains on securities without an allowance for expected credit losses | $ 140,250 |  |  |  |  |  | 108,244 |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | 32,004 |  |  |  |
Net change in period | 29,927 |  |  |  |  |  |  |  | 29,927 |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 13,917 |
Stock issued |  |  |  |  |  |  |  |  |  | 726 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (346,357) |
Contributions (distributions) |  |  |  |  |  |  |  |  |  |  | (30,721)
Net income | 532,985 |  |  | 530,670 |  |  |  |  |  |  | 2,315
Dividends ($0.89, $1.34, and $0.31 per share, respectively) |  |  |  | (84,147) |  |  |  |  |  |  |
Other comprehensive loss, net of tax | 170,177 |  |  |  |  |  |  |  |  |  | (2)
End of period at Dec. 31, 2020 |  | 105,803 | 977,215 | 8,348,381 | 0 | $ (62,172) | 289,714 | 0 | (351,886) | (3,058,425) | 14,995
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (44,041) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 47,930 |  |  |  |  |  |  |  |
Change in controlling financial interest of a subsidiary |  |  | 0 |  |  |  |  |  |  |  |
Change in unrealized (losses) gains on securities without an allowance for expected credit losses | (198,812) |  |  |  |  |  | (208,938) |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | 10,124 |  |  |  |
Net change in period | (20,969) |  |  |  |  |  |  |  | (20,969) |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 13,264 |
Stock issued |  |  |  |  |  |  |  |  |  | 511 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (122,426) |
Contributions (distributions) |  |  |  |  |  |  |  |  |  |  | (8,799)
Net income | 1,031,015 |  |  | 1,022,490 |  |  |  |  |  |  | 8,525
Dividends ($0.89, $1.34, and $0.31 per share, respectively) |  |  |  | (355,736) |  |  |  |  |  |  |
Other comprehensive loss, net of tax | (219,781) |  |  |  |  | (219,781) |  |  | (20,969) |  | (2)
End of period at Dec. 31, 2021 | 6,667,730 | $ 105,803 | 981,104 | 9,015,135 | $ 0 | (281,955) | 90,900 | $ 0 | (372,855) | (3,167,076) | 14,719
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restricted stock units issued |  |  | (32,622) |  |  |  |  |  |  |  |
Restricted stock units expensed |  |  | 49,052 |  |  |  |  |  |  |  |
Change in controlling financial interest of a subsidiary |  |  | 0 |  |  |  |  |  |  |  |
Change in unrealized (losses) gains on securities without an allowance for expected credit losses | (983,803) |  |  |  |  |  | (955,435) |  |  |  |
Change in unrealized (losses) gains on securities with an allowance for expected credit losses |  |  |  |  |  |  | (28,370) |  |  |  |
Net change in period | 1,179 |  |  |  |  |  |  |  | 1,179 |  |
Stock exercised/vested |  |  |  |  |  |  |  |  |  | 9,428 |
Stock issued |  |  |  |  |  |  |  |  |  | 359 |
Stock repurchased |  |  |  |  |  |  |  |  |  | (94,140) |
Contributions (distributions) |  |  |  |  |  |  |  |  |  |  | 1,220
Net income | 1,384,954 |  |  | 1,381,062 |  |  |  |  |  |  | 3,892
Dividends ($0.89, $1.34, and $0.31 per share, respectively) |  |  |  | (235,192) |  |  |  |  |  |  |
Other comprehensive loss, net of tax | (982,624) |  |  |  |  | (982,624) |  |  | 1,179 |  | (2)
End of period at Dec. 31, 2022 | $ 6,768,161 |  | $ 997,534 | $ 10,161,005 |  | $ (1,264,581) | $ (892,905) |  | $ (371,676) | $ (3,251,429) | $ 19,829

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