Nature of Operations and Summary of Significant Accounting Policies - Income taxes (Details) |
6 Months Ended |
|---|---|
Jun. 30, 2026 | |
| U.S. federal | |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | |
| Income tax examination, year under examination | 2021 2022 2023 2024 2025 |
| OHIO | |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | |
| Income tax examination, year under examination | 2020 2021 2022 2023 2024 |