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Mortgage Loan Servicing, Origination, and Loans Held for Sale (Tables) | 3 Months Ended
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Mar. 31, 2025
Mortgage Loan Servicing, Origination, and Loans Held for Sale |
Summary of changes in the fair value of MSRs and its offsetting hedge | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
(Dollars in thousands) |  | March 31, 2025 |  | March 31, 2024
(Decrease)/increase in fair value of MSRs | ​ | $ | (3,081) | ​ | $ | 2,384
Decay of MSRs | ​ |  | (1,028) | ​ |  | (1,442)
Gain (loss) related to derivatives | ​ | ​ | 2,340 | ​ | ​ | (2,580)
Net effect on Consolidated Statements of Income | ​ | $ | (1,769) | ​ | $ | (1,638)
Schedule of characteristics and sensitivity analysis of the MSR | The characteristics and sensitivity analysis of the MSRs are included in the following table.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | ​ | December 31, | ​ | ​
(Dollars in thousands) |  | 2025 |  |  | 2024 |  |
Composition of residential loans serviced for others | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fixed-rate mortgage loans | ​ | ​ | 100.0 | % | ​ | ​ | 100.0 | % | ​
Adjustable-rate mortgage loans | ​ | ​ | — | % | ​ | ​ | — | % | ​
Total | ​ | ​ | 100.0 | % | ​ | ​ | 100.0 | % | ​
Weighted average life | ​ | ​ | 7.73 | years | ​ | ​ | 7.97 | years | ​
Constant Prepayment rate (CPR) | ​ | ​ | 7.5 | % | ​ | ​ | 7.0 | % | ​
Estimated impact on fair value of a 10% increase | ​ | $ | (883) | ​ | ​ | $ | (658) | ​ | ​
Estimated impact on fair value of a 20% increase | ​ | ​ | (1,721) | ​ | ​ | ​ | (1,298) | ​ | ​
Estimated impact on fair value of a 10% decrease | ​ | ​ | 927 | ​ | ​ | ​ | 666 | ​ | ​
Estimated impact on fair value of a 20% decrease | ​ | ​ | 1,884 | ​ | ​ | ​ | 1,328 | ​ | ​
Weighted average discount rate | ​ | ​ | 10.8 | % | ​ | ​ | 10.9 | % | ​
Estimated impact on fair value of a 10% increase | ​ | $ | (3,186) | ​ | ​ | $ | (3,166) | ​ | ​
Estimated impact on fair value of a 20% increase | ​ | ​ | (6,348) | ​ | ​ | ​ | (6,339) | ​ | ​
Estimated impact on fair value of a 10% decrease | ​ | ​ | 3,072 | ​ | ​ | ​ | 3,022 | ​ | ​
Estimated impact on fair value of a 20% decrease | ​ | ​ | 5,825 | ​ | ​ | ​ | 5,738 | ​ | ​
Effect on fair value due to change in interest rates | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
25 basis point increase | ​ | $ | 2,164 | ​ | ​ | $ | 1,761 | ​ | ​
50 basis point increase | ​ | ​ | 4,128 | ​ | ​ | ​ | 3,296 | ​ | ​
25 basis point decrease | ​ | ​ | (2,281) | ​ | ​ | ​ | (1,952) | ​ | ​
50 basis point decrease | ​ | ​ | (4,628) | ​ | ​ | ​ | (4,052) | ​ | ​

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- Definition Tabular disclosure related to composition of residential mortgages serviced for others, characteristics and sensitivity analysis of the mortgage servicing rights. + References No definition available. + Details
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