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Regulatory Capital Requirements (Tables) | 12 Months Ended
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Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule Of Capital Amounts And Ratios On Consolidated Basis | The following tables show the capital amounts and ratios for the Company (on a consolidated basis) and the Bank, together with the minimum capital adequacy and well-capitalized capital requirements, at the last two year ends.
| Actual |  | Minimum Capital Adequacy Requirement |  | Well-Capitalized Capital Requirement
(Dollars in thousands) | Amount | Ratio |  | Amount | Ratio |  | Amount | Ratio
December 31, 2020 |  |  |  |  |  |  |  |
Total Capital (to risk-weighted assets): |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 3,189,432 |  | 14.82 | % |  | $ | 1,721,317 |  | 8.00 | % |  | N.A. | N.A.
Commerce Bank | 2,844,675 |  | 13.30 |  |  | 1,710,778 |  | 8.00 |  |  | $ | 2,138,472 |  | 10.00 | %
Tier I Capital (to risk-weighted assets): |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 2,950,926 |  | 13.71 | % |  | $ | 1,290,988 |  | 6.00 | % |  | N.A. | N.A.
Commerce Bank | 2,606,169 |  | 12.19 |  |  | 1,283,083 |  | 6.00 |  |  | $ | 1,710,778 |  | 8.00 | %
Tier I Common Capital (to risk-weighted assets): |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 2,950,926 |  | 13.71 | % |  | $ | 968,241 |  | 4.50 | % |  | N.A. | N.A.
Commerce Bank | 2,606,169 |  | 12.19 |  |  | 962,312 |  | 4.50 |  |  | $ | 1,390,007 |  | 6.50 | %
Tier I Capital (to adjusted quarterly average assets): |  |  |  |  |  |  |  |
(Leverage Ratio) |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 2,950,926 |  | 9.45 | % |  | $ | 1,249,584 |  | 4.00 | % |  | N.A. | N.A.
Commerce Bank | 2,606,169 |  | 8.36 |  |  | 1,246,470 |  | 4.00 |  |  | $ | 1,558,087 |  | 5.00 | %
December 31, 2019 |  |  |  |  |  |  |  |
Total Capital (to risk-weighted assets): |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 3,052,079 |  | 15.48 | % |  | $ | 1,577,105 |  | 8.00 | % |  | N.A. | N.A.
Commerce Bank | 2,583,676 |  | 13.19 |  |  | 1,566,866 |  | 8.00 |  |  | $ | 1,958,583 |  | 10.00 | %
Tier I Capital (to risk-weighted assets): |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 2,890,322 |  | 14.66 | % |  | $ | 1,182,829 |  | 6.00 | % |  | N.A. | N.A.
Commerce Bank | 2,421,919 |  | 12.37 |  |  | 1,175,150 |  | 6.00 |  |  | $ | 1,566,866 |  | 8.00 | %
Tier I Common Capital (to risk-weighted assets): |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 2,745,538 |  | 13.93 | % |  | $ | 887,122 |  | 4.50 | % |  | N.A. | N.A.
Commerce Bank | 2,421,919 |  | 12.37 |  |  | 881,362 |  | 4.50 |  |  | $ | 1,273,079 |  | 6.50 | %
Tier I Capital (to adjusted quarterly average assets): |  |  |  |  |  |  |  |
(Leverage Ratio) |  |  |  |  |  |  |  |
Commerce Bancshares, Inc. (consolidated) | $ | 2,890,322 |  | 11.38 | % |  | $ | 1,015,771 |  | 4.00 | % |  | N.A. | N.A.
Commerce Bank | 2,421,919 |  | 9.57 |  |  | 1,012,232 |  | 4.00 |  |  | $ | 1,265,290 |  | 5.00 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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