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Business Combination & Asset Purchase - Summary of Consideration Paid and Amounts of Assets Acquired and Liabilities Assumed Recognized (Detail) - USD ($) $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 16, 2020 | Jan. 01, 2019 | Dec. 31, 2019 | Dec. 31, 2020
Assets |  |  |  |
Goodwill |  |  | $ 47,340 | $ 47,340
Limberlost Bancshares, Inc. [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash |  | $ 8,465 | $ 8,465 |
Common Shares (1,830,000 shares) |  | 70,437 |  |
Total |  | 78,902 |  |
Assets |  |  |  |
Cash and cash equivalents |  | 6,376 |  |
Securities - available-for-sale |  | 17,494 |  |
Other securities, at cost |  | 2,347 |  |
Loans, net |  | 257,183 |  |
Premises and equipment |  | 2,538 |  |
Goodwill |  | 43,266 |  |
Other assets |  | 7,176 |  |
Total Assets Purchased |  | 336,380 |  |
Deposits |  |  |  |
Noninterest bearing |  | 37,822 |  |
Interest bearing |  | 168,312 |  |
Total deposits |  | 206,134 |  |
Federal Home Loan Bank (FHLB) advances |  | 48,196 |  |
Accrued expenses and other liabilities |  | 3,148 |  |
Total Liabilities Assumed |  | $ 257,478 |  |
Adams County Financial Resources |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Common Shares (1,830,000 shares) | $ 825 |  |  |
Total | 825 |  |  |
Assets |  |  |  |
Premises and equipment | 25 |  |  |
Total Assets Purchased | 825 |  |  |
Customer list intangible | $ 800 |  |  |

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