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Mortgage Servicing Rights - MSR Amortization Expense (Details) - Mortgage
$ in Thousands
Dec. 31, 2020
USD ($)
Servicing Assets at Amortized Value [Line Items]  
2021 $ 6,550
2022 6,091
2023 5,586
2024 5,034
2025 4,429
Beyond 2025 11,055
Total estimated amortization expense $ 38,745