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Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Core Deposit Intangibles    
Estimated future amortization expense    
Nine months ended December 31, 2022 $ 6,608  
2023 8,811  
2024 8,811  
2025 8,811  
2026 8,811  
2027 8,811  
Beyond 2027 5,227  
Net book value 55,890 $ 58,093
Other Intangibles    
Estimated future amortization expense    
Net book value 0 $ 0
Mortgage Servicing Rights    
Estimated future amortization expense    
Nine months ended December 31, 2022 8,956  
2023 11,320  
2024 9,663  
2025 8,227  
2026 6,874  
2027 5,913  
Beyond 2027 16,062  
Net book value $ 67,015