| Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] |
| (Dollars in thousands, except per share data) | | | | |
| | | | | |
| Consideration: | | | | |
| Cash | | $ | 50,876 | |
| Common stock (924,999 shares issued at $48.55 per share) | | | 44,909 | |
| Total consideration | | $ | 95,785 | |
| | | | | |
| Identifiable assets acquired | | | | |
| Cash and due from banks | | $ | 62,361 | |
| Interest-earning deposits | | | 42,084 | |
| Securities available for sale | | | 198,399 | |
| Loans, net | | | 201,320 | |
| Premises and equipment | | | 7,482 | |
| Core deposit intangible | | | 19,038 | |
| Other assets | | | 16,875 | |
| Total identifiable assets acquired | | | 547,559 | |
| | | | | |
| Identifiable liabilities assumed | | | | |
| Deposits | | $ | 474,898 | |
| Other liabilities | | | 1,093 | |
| Total identifiable liabilities acquired | | | 475,991 | |
| | | | | |
| Net identifiable assets acquired | | $ | 71,568 | |
| | | | | |
| Goodwill | | $ | 24,217 | |
|
| Business Combination, Pro Forma Information [Table Text Block] |
| | | Three Months Ended June 30, | | | Six Months Ended June 30, | |
| (Dollars in thousands, except per share data) | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| | | | | | | | | | | | | | | | | |
| Net interest income | | $ | 57,143 | | | $ | 54,770 | | | $ | 112,928 | | | $ | 108,382 | |
| Provision for credit losses | | | (1,800 | ) | | | 1,349 | | | | (3,600 | ) | | | 3,318 | |
| Noninterest income | | | 11,498 | | | | 11,968 | | | | 23,189 | | | | 21,149 | |
| Noninterest expense | | | 39,109 | | | | 37,598 | | | | 80,744 | | | | 72,953 | |
| Income before income taxes | | | 31,332 | | | | 27,791 | | | | 58,973 | | | | 53,260 | |
| Income tax expense | | | 5,222 | | | | 3,925 | | | | 9,745 | | | | 8,918 | |
| | | | | | | | | | | | | | | | | |
| Net income | | $ | 26,110 | | | $ | 23,866 | | | $ | 49,228 | | | $ | 44,342 | |
| | | | | | | | | | | | | | | | | |
| Earnings per share | | $ | 1.51 | | | $ | 1.39 | | | $ | 2.85 | | | $ | 2.59 | |
|