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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2025
Stockholders' Equity Note [Abstract] |
Schedule of Common Stock Outstanding Roll Forward | The Company has 50,000,000 shares of no par value common stock authorized. The following table presents a rollforward of changes in common shares issued and outstanding.
| Quarter Ended September 30, |  | Nine Months Ended September 30,
(shares in ones) | 2025 |  | 2024 |  | 2025 |  | 2024
Issued and outstanding common shares, beginning of period | 12,654,180 |  |  | 12,962,032 |  |  | 12,790,117 |  |  | 13,131,672 |
Issuance of common shares | 2,844 |  |  | 5,324 |  |  | 6,508 |  |  | 9,311 |
Repurchase of common shares | (36,512) |  |  | (80,379) |  |  | (176,113) |  |  | (254,006) |
Issued and outstanding common shares, end of period | 12,620,512 |  |  | 12,886,977 |  |  | 12,620,512 |  |  | 12,886,977 |
Schedule Of Net Income (Loss) Per Common Share | The following table presents basic net income per common share and diluted net income per common share.
| Quarter Ended September 30, |  | Nine Months Ended September 30,
(in thousands, except per share amounts) | 2025 |  | 2024 |  | 2025 |  | 2024
Net income to common shareholders | $ | 751,336 |  |  | $ | 904,959 |  |  | $ | 1,504,089 |  |  | $ | 2,179,844 |
Adjustment and purchase of redeemable noncontrolling interests | (4,653) |  |  | (42,565) |  |  | 29,989 |  |  | (81,267) |
Adjusted net income to common shareholders | $ | 746,683 |  |  | $ | 862,394 |  |  | $ | 1,534,078 |  |  | $ | 2,098,577 |
Weighted average basic common shares outstanding | 12,562 |  |  | 12,987 |  |  | 12,687 |  |  | 13,058 |
Weighted average dilutive potential common shares from restricted stock units and restricted stock | 40 |  |  | 30 |  |  | 33 |  |  | 24 |
Weighted average diluted common shares outstanding | 12,602 |  |  | 13,017 |  |  | 12,720 |  |  | 13,082 |
Basic net income per common share | $ | 59.44 |  |  | $ | 66.40 |  |  | $ | 120.92 |  |  | $ | 160.71 |
Diluted net income per common share | $ | 59.25 |  |  | $ | 66.25 |  |  | $ | 120.60 |  |  | $ | 160.42 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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