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Business Combination & Asset Purchase - Schedule of Future Amortization of Core Deposit Intangible Assets (Detail)
$ in Thousands
Dec. 31, 2022
USD ($)
Core Deposits [Member]  
Business Acquisition [Line Items]  
2023 $ 1,656
2024 1,656
2025 1,656
2026 1,096
2027 1,096
Thereafter 1,627
Total 8,787
Core Deposits [Member] | Geneva [Member]  
Business Acquisition [Line Items]  
2023 560
2024 560
2025 560
Total 1,680
Core Deposits [Member] | Ossian Financial Services, Inc. [Member]  
Business Acquisition [Line Items]  
2023 140
2024 140
2025 140
2026 140
2027 140
Thereafter 47
Total 747
Core Deposits [Member] | Perpetual Federal Savings Bank [Member]  
Business Acquisition [Line Items]  
2023 95
2024 95
2025 95
2026 95
2027 95
Thereafter 74
Total 549
Core Deposits [Member] | Peoples Federal Savings and Loan [Member]  
Business Acquisition [Line Items]  
2023 861
2024 861
2025 861
2026 861
2027 861
Thereafter 1,506
Total 5,811
Customer Lists [Member]  
Business Acquisition [Line Items]  
2023 123
2024 123
2025 123
2026 123
2027 47
Total $ 539