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Common Stock (Tables) | 6 Months Ended
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Jun. 30, 2025
Common Stock [Abstract] |
Summary Of Components Used To Calculate Basic And Diluted Income Per Share | Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that pay nonforfeitable common stock dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 13.
| For the Three Months Ended June 30 |  | For the Six Months Ended June 30
(In thousands, except per share data) | 2025 | 2024 |  | 2025 | 2024
Basic income per common share: |  |  |  |  |
Net income attributable to Commerce Bancshares, Inc. | $ | 152,479 |  | $ | 139,553 |  |  | $ | 284,071 |  | $ | 252,216 |
Less income allocated to nonvested restricted stock | 1,461 |  | 1,313 |  |  | 2,720 |  | 2,357 |
Net income allocated to common stock | $ | 151,018 |  | $ | 138,240 |  |  | $ | 281,351 |  | $ | 249,859 |
Weighted average common shares outstanding | 132,455 |  | 134,881 |  |  | 132,685 |  | 135,187 |
Basic income per common share | $ | 1.14 |  | $ | 1.03 |  |  | $ | 2.12 |  | $ | 1.85 |
Diluted income per common share: |  |  |  |  |
Net income attributable to Commerce Bancshares, Inc. | $ | 152,479 |  | $ | 139,553 |  |  | $ | 284,071 |  | $ | 252,216 |
Less income allocated to nonvested restricted stock | 1,460 |  | 1,312 |  |  | 2,718 |  | 2,355 |
Net income allocated to common stock | $ | 151,019 |  | $ | 138,241 |  |  | $ | 281,353 |  | $ | 249,861 |
Weighted average common shares outstanding | 132,455 |  | 134,881 |  |  | 132,685 |  | 135,187 |
Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods | 128 |  | 160 |  |  | 141 |  | 156 |
Weighted average diluted common shares outstanding | 132,583 |  | 135,041 |  |  | 132,826 |  | 135,343 |
Diluted income per common share | $ | 1.14 |  | $ | 1.03 |  |  | $ | 2.12 |  | $ | 1.85 |

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- Definition Common Stock [Abstract] + References No definition available. + Details
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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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