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Business Combination & Asset Purchase - Schedule of Future Amortization of Core Deposit Intangible Assets (Detail)
$ in Thousands
Dec. 31, 2021
USD ($)
Core Deposits [Member]  
Business Acquisition [Line Items]  
2022 $ 795
2023 795
2024 795
2025 795
2026 235
Thereafter 356
Total 3,771
Core Deposits [Member] | Geneva [Member]  
Business Acquisition [Line Items]  
2022 560
2023 560
2024 560
2025 560
Total 2,240
Core Deposits [Member] | Ossian Financial Services, Inc. [Member]  
Business Acquisition [Line Items]  
2022 140
2023 140
2024 140
2025 140
2026 140
Thereafter 187
Total 887
Core Deposits [Member] | Perpetual Federal Savings Bank [Member]  
Business Acquisition [Line Items]  
2022 95
2023 95
2024 95
2025 95
2026 95
Thereafter 169
Total 644
Customer Lists [Member]  
Business Acquisition [Line Items]  
2022 123
2023 123
2024 123
2025 123
2026 123
Thereafter 47
Total $ 662