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Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2020
Significant Accounting Policies |
Impact of ASC Topic 326 | The following table illustrates the impact of ASC 326 (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | January 1, 2020
​ | ​ | ​ | ​ | ​ | ​ | Pre-tax
​ | ​ | Post ASC 326 | ​ | Pre-ASC 326 | ​ | impact of ASC 326
​ |  | Adoption |  | Adoption |  | Adoption
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial | ​ | $ | 19,006 | ​ | $ | 18,291 | ​ | $ | 715
Commercial real estate | ​ | ​ | 30,496 | ​ | ​ | 21,190 | ​ | ​ | 9,306
Real estate construction | ​ | ​ | 6,158 | ​ | ​ | 3,204 | ​ | ​ | 2,954
Retail real estate | ​ | ​ | 13,787 | ​ | ​ | 10,495 | ​ | ​ | 3,292
Retail other | ​ | ​ | 1,134 | ​ | ​ | 568 | ​ | ​ | 566
Total allowance for credit losses | ​ | $ | 70,581 | ​ | $ | 53,748 | ​ | $ | 16,833
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reserve for off-balance-sheet credit exposures | ​ | $ | 5,492 | ​ |  | — | ​ |  | 5,492

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