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Shareholders' Equity (Details) - USD ($) | 12 Months Ended | 69 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Oct. 15, 2021 | Nov. 30, 2020 | Mar. 31, 2017
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Deferred compensation paid to participants |  |  | $ 6,100,000 |  |  |
Authorized repurchase amount | $ 40,000,000 |  | 40,000,000 |  | $ 20,000,000 |
Number of shares repurchased (in shares) | 0 | 106,744 |  |  |  |
Average price (in dollars per share) |  | $ 37.81 |  |  |  |
Value of repurchased shares |  | $ 4,000,000 |  |  |  |
Carolina Bank |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Deferred compensation plan | $ 1,600,000 | $ 1,800,000 | $ 1,600,000 |  |  | $ 7,700,000
Select |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |
Deferred compensation, value of stock |  |  |  | $ 5,100,000 |  |

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