XML 98 R87.htm IDEA: XBRL DOCUMENT v3.21.2
Loan Servicing, Mortgage Origination, and Loans Held for Sale (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Loans held for sale, loan servicing and mortgage origination          
Residential mortgages serviced for others $ 6,000,000   $ 6,000,000   $ 5,100,000
Contractually specified servicing fees earned 3,800 $ 2,500 10,500 $ 6,800  
Mortgage servicing rights 60,922   60,922   $ 43,820
Changes in the fair value of MSRs and its offsetting hedge.          
Increase (decrease) in fair value of MSRs 1,659 1,020 7,543 (9,078)  
Decay of MSRs (3,427) (2,391) (11,276) (5,590)  
Gain (loss) related to derivatives (577) 619 (4,178) 10,915  
Net effect on statements of income $ (2,345) $ (752) $ (7,911) $ (3,753)  
Characteristics and sensitivity analysis of the MSR          
Composition of residential loans serviced for others 100.00%   100.00%   100.00%
Weighted average life (in years)     7 years 1 month 20 days   6 years 1 month 6 days
Constant Prepayment rate (CPR) (as a percent)     8.90%   12.30%
Weighted average discount rate (as a percent)     9.00%   9.00%
Effect on fair value due to change in interest rates:          
25 basis point increase $ 3,906   $ 3,906   $ 2,744
50 basis point increase 7,442   7,442   5,520
25 basis point decrease (4,040)   (4,040)   (2,497)
50 basis point decrease (7,660)   (7,660)   (4,114)
Custodial escrow balances maintained in connection with the loan servicing $ 65,500   $ 65,500   $ 26,600
Fixed-rate mortgage loans          
Characteristics and sensitivity analysis of the MSR          
Composition of residential loans serviced for others 99.90%   99.90%   99.90%
Adjustable-rate mortgage loans          
Characteristics and sensitivity analysis of the MSR          
Composition of residential loans serviced for others 0.10%   0.10%   0.10%