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Common Stock | 9 Months Ended
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Sep. 30, 2022
Common Stock [Abstract] |
Common Stock | Common Stock * 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 September 30 |  | For the Nine Months Ended September 30
(In thousands, except per share data) | 2022 | 2021 |  | 2022 | 2021
Basic income per common share: |  |  |  |  |
Net income attributable to Commerce Bancshares, Inc. | $ | 122,823 |  | $ | 122,561 |  |  | $ | 356,771 |  | $ | 415,859 |
Less income allocated to nonvested restricted stock | 1,119 |  | 1,114 |  |  | 3,241 |  | 3,792 |
Net income allocated to common stock | $ | 121,704 |  | $ | 121,447 |  |  | $ | 353,530 |  | $ | 412,067 |
Weighted average common shares outstanding | 118,895 |  | 121,628 |  |  | 119,619 |  | 121,889 |
Basic income per common share | $ | 1.03 |  | $ | 1.00 |  |  | $ | 2.96 |  | $ | 3.38 |
Diluted income per common share: |  |  |  |  |
Net income attributable to Commerce Bancshares, Inc. | $ | 122,823 |  | $ | 122,561 |  |  | $ | 356,771 |  | $ | 415,859 |
Less income allocated to nonvested restricted stock | 1,118 |  | 1,112 |  |  | 3,236 |  | 3,785 |
Net income allocated to common stock | $ | 121,705 |  | $ | 121,449 |  |  | $ | 353,535 |  | $ | 412,074 |
Weighted average common shares outstanding | 118,895 |  | 121,628 |  |  | 119,619 |  | 121,889 |
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 | 264 |  | 253 |  |  | 274 |  | 294 |
Weighted average diluted common shares outstanding | 119,159 |  | 121,881 |  |  | 119,893 |  | 122,183 |
Diluted income per common share | $ | 1.02 |  | $ | .99 |  |  | $ | 2.95 |  | $ | 3.37 |
Unexercised stock appreciation rights of 167 thousand and 99 thousand for the three month periods ended September 30, 2022 and 2021, respectively, and 152 thousand and 61 thousand for the nine month periods ended September 30, 2022 and 2021, respectively, were excluded from the computation of diluted income per common share because their inclusion would have been anti-dilutive. * All prior year share and per share amounts in this note have been restated for the 5% common stock dividend distributed in December 2021.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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