Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Summary of Mortgage Servicing Rights (Detail)

v3.22.1
Fair Value - Summary of Mortgage Servicing Rights (Detail)
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Discount rate 3.12% 3.03%
Mortgage Servicing Rights [Member] | Minimum [Member] | Weighted Average Prepayment Speed [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Weighted average prepayment speed (CPR) 0.10% 0.00%
Mortgage Servicing Rights [Member] | Minimum [Member] | Weighted average delinquency rate [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Weighted average delinquency rate 0.80% 0.80%
Mortgage Servicing Rights [Member] | Maximum [Member] | Weighted Average Prepayment Speed [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Weighted average prepayment speed (CPR) 10.50% 12.80%
Mortgage Servicing Rights [Member] | Maximum [Member] | Weighted average delinquency rate [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Weighted average delinquency rate 12.40% 14.30%
Mortgage Servicing Rights [Member] | Weighted Average [Member] | Weighted Average Prepayment Speed [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Weighted average prepayment speed (CPR) 6.70% 8.30%
Mortgage Servicing Rights [Member] | Weighted Average [Member] | Discount rate [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Discount rate 8.30% 8.50%
Mortgage Servicing Rights [Member] | Weighted Average [Member] | Weighted average delinquency rate [Member]    
Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value [Line Items]    
Weighted average delinquency rate 1.40% 1.30%