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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule of actual and required capital amounts and ratios | The following table shows the actual and required capital amounts and ratios for 1st Source Corporation and 1st Source Bank as of December 31, 2020 and 2019.
|  | Actual |  | Minimum Capital Adequacy |  | Minimum Capital Adequacy with Capital Buffer |  | To Be Well Capitalized Under Prompt Corrective Action Provisions
(Dollars in thousands) |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | $ | 966,092 |  |  | 15.99 | % |  | $ | 483,350 |  |  | 8.00 | % |  | $ | 634,397 |  |  | 10.50 | % |  | $ | 604,188 |  |  | 10.00 | %
1st Source Bank |  | 881,983 |  |  | 14.59 |  |  | 483,637 |  |  | 8.00 |  |  | 634,774 |  |  | 10.50 |  |  | 604,546 |  |  | 10.00 |
Tier 1 Capital (to Risk-Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | 889,709 |  |  | 14.73 |  |  | 362,513 |  |  | 6.00 |  |  | 513,560 |  |  | 8.50 |  |  | 483,350 |  |  | 8.00 |
1st Source Bank |  | 805,556 |  |  | 13.32 |  |  | 362,728 |  |  | 6.00 |  |  | 513,864 |  |  | 8.50 |  |  | 483,637 |  |  | 8.00 |
Common Equity Tier 1 Capital (to Risk-Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | 788,884 |  |  | 13.06 |  |  | 271,884 |  |  | 4.50 |  |  | 422,931 |  |  | 7.00 |  |  | 392,722 |  |  | 6.50 |
1st Source Bank |  | 761,731 |  |  | 12.60 |  |  | 272,046 |  |  | 4.50 |  |  | 423,182 |  |  | 7.00 |  |  | 392,955 |  |  | 6.50 |
Tier 1 Capital (to Average Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | 889,709 |  |  | 12.15 |  |  | 292,977 |  |  | 4.00 |  |  | N/A |  | N/A |  | 366,221 |  |  | 5.00 |
1st Source Bank |  | 805,556 |  |  | 11.00 |  |  | 292,959 |  |  | 4.00 |  |  | N/A |  | N/A |  | 366,199 |  |  | 5.00 |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | $ | 882,453 |  |  | 14.90 | % |  | $ | 473,782 |  |  | 8.00 | % |  | $ | 621,839 |  |  | 10.50 | % |  | $ | 592,227 |  |  | 10.00 | %
1st Source Bank |  | 804,131 |  |  | 13.57 |  |  | 474,189 |  |  | 8.00 |  |  | 622,373 |  |  | 10.50 |  |  | 592,736 |  |  | 10.00 |
Tier 1 Capital (to Risk-Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | 807,926 |  |  | 13.64 |  |  | 355,336 |  |  | 6.00 |  |  | 503,393 |  |  | 8.50 |  |  | 473,782 |  |  | 8.00 |
1st Source Bank |  | 729,541 |  |  | 12.31 |  |  | 355,642 |  |  | 6.00 |  |  | 503,826 |  |  | 8.50 |  |  | 474,189 |  |  | 8.00 |
Common Equity Tier 1 Capital (to Risk-Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | 743,467 |  |  | 12.55 |  |  | 266,502 |  |  | 4.50 |  |  | 414,559 |  |  | 7.00 |  |  | 384,948 |  |  | 6.50 |
1st Source Bank |  | 722,082 |  |  | 12.18 |  |  | 266,731 |  |  | 4.50 |  |  | 414,915 |  |  | 7.00 |  |  | 385,279 |  |  | 6.50 |
Tier 1 Capital (to Average Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1st Source Corporation |  | 807,926 |  |  | 12.19 |  |  | 265,122 |  |  | 4.00 |  |  | N/A |  | N/A |  | 331,402 |  |  | 5.00 |
1st Source Bank |  | 729,541 |  |  | 11.03 |  |  | 264,500 |  |  | 4.00 |  |  | N/A |  | N/A |  | 330,625 |  |  | 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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