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Mortgage Servicing Rights - Summary of Estimated Future Amortization Expense for Mortgage Servicing Rights (Detail)
$ in Thousands
Mar. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2020 $ 409
2021 383
2022 358
2023 333
2024 305
Thereafter 148
Total $ 1,936