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Other Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Other Assets. |
Schedule of carrying amount of goodwill reported in reporting units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Retail | ​ | Commercial | ​ | ​ | ​
(in thousands) |  | Banking |  | Banking |  | Total
December 31, 2024 | ​ | $ | 687,492 | ​ | $ | 308,000 | ​ | $ | 995,492
December 31, 2023 | ​ | ​ | 687,492 | ​ | ​ | 308,000 | ​ | ​ | 995,492
Schedule of estimated future amortization expense for MSRs | ​
​ | ​ | ​ | ​
​ | ​ | Estimated
(dollars in thousands) |  | Amortization
Year ending December 31: | ​ | ​ | ​
Under one year | ​ | $ | 758
One to two years | ​ | ​ | 669
Two to three years | ​ | ​ | 589
Three to four years | ​ | ​ | 519
Four to five years | ​ | ​ | 460
Schedule of details of the Company's MSRs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(dollars in thousands) |  | 2024 |  | 2023
Gross carrying amount | ​ | $ | 69,903 | ​ | $ | 69,515
Less: accumulated amortization | ​ | ​ | 64,825 | ​ | ​ | 63,816
Net carrying value | ​ | $ | 5,078 | ​ | $ | 5,699
​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of changes in amortized MSRs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(dollars in thousands) |  | 2024 |  | 2023
Balance at beginning of year | ​ | $ | 5,699 | ​ | $ | 6,562
Originations | ​ | ​ | 388 | ​ | ​ | 242
Amortization | ​ | ​ | (1,009) | ​ | ​ | (1,105)
Balance at end of year | ​ | $ | 5,078 | ​ | $ | 5,699
Fair value of amortized MSRs at beginning of year | ​ | $ | 14,308 | ​ | $ | 15,193
Fair value of amortized MSRs at end of year | ​ | $ | 13,404 | ​ | $ | 14,308
Balance of loans serviced for others | ​ | $ | 1,258,268 | ​ | $ | 1,325,171
Schedule of quantitative assumptions used in determining lower of cost or fair value of MSRs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024 | ​ | December 31, 2023 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​
​ |  | Range | ​ | Average | ​ | Range | ​ | Average | ​
Conditional prepayment rate | ​ | 6.99 | % | - | 11.77 | % | 7.16 | % | 6.87 | % | - | 11.53 | % | 7.04 | %
Life in years (of the MSR) | ​ | 4.14 | ​ | - | 7.02 | ​ | 6.94 | ​ | 4.30 | ​ | - | 7.22 | ​ | 7.09 | ​
Weighted-average coupon rate | ​ | 3.71 | % | - | 5.66 | % | 3.80 | % | 3.57 | % | - | 5.81 | % | 3.73 | %
Discount rate | ​ | 10.35 | % | - | 10.94 | % | 10.40 | % | 10.40 | % | - | 10.60 | % | 10.52 | %

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- Definition Tabular disclosure of all information related to the key inputs and assumptions used in measuring the fair value of assets obtained or liabilities incurred, as the result of a sale of financial assets, relating to the transferor's continuing involvement, if any, at the time of securitization, asset-backed financing arrangement, or similar transfer (including at a minimum, but not limited to, and if applicable, quantitative information about discount rates, expected prepayments including the expected weighted-average life of prepayable financial assets, and anticipated credit losses, including expected static pool losses). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-3 + Details
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