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Recent Accounting Pronouncements (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract] |
Accounting Standards Update and Change in Accounting Principle | The main drivers of the adjustment to retained earnings are summarized in the following table.
(Dollar in thousands) | Pre-ASC 326 Adoption December 31, 2019 |  | Impact of ASC 326 Adoption |  | As Reported Under ASC 326 January 1, 2020
Allowance for credit losses |  |  |  |  |
Commercial and agricultural | $ | 23,671 |  |  | $ | (655) |  |  | $ | 23,016 |
Auto and light truck | 14,400 |  |  | (1,303) |  |  | 13,097 |
Medium and heavy duty truck | 4,612 |  |  | 2,414 |  |  | 7,026 |
Aircraft | 31,058 |  |  | 484 |  |  | 31,542 |
Construction equipment | 14,120 |  |  | 372 |  |  | 14,492 |
Commercial real estate | 18,350 |  |  | (649) |  |  | 17,701 |
Residential real estate and home equity | 3,609 |  |  | 1,688 |  |  | 5,297 |
Consumer | 1,434 |  |  | 233 |  |  | 1,667 |
Total allowance for credit losses on loans and leases | 111,254 |  |  | 2,584 |  |  | 113,838 |
Accrued expenses and other liabilities (unfunded loan commitments) | 3,172 |  |  | 777 |  |  | 3,949 |
Total allowance for credit losses | $ | 114,426 |  |  | $ | 3,361 |  |  | $ | 117,787 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e765-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e725-108305 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794 + Details
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