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Other Assets (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Other Assets. |
Schedule of carrying amount of goodwill reported in reporting units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Retail | ​ | Commercial | ​ | ​ | ​
(in thousands) |  | Banking |  | Banking |  | Total
December 31, 2021 | ​ | $ | 687,492 | ​ | $ | 308,000 | ​ | $ | 995,492
December 31, 2020 | ​ | ​ | 687,492 | ​ | ​ | 308,000 | ​ | ​ | 995,492
Schedule of estimated future amortization expense for MSRs | ​
​ | ​ | ​ | ​
​ | ​ | Estimated
(dollars in thousands) |  | Amortization
Year ending December 31: | ​ | ​ | ​
2022 | ​ | $ | 1,613
2023 | ​ | ​ | 1,274
2024 | ​ | ​ | 1,036
2025 | ​ | ​ | 854
2026 | ​ | ​ | 710
Schedule of details of the Company's MSRs | ​
​ | ​ | ​ | ​ | ​ | ​
​ | December 31,
(dollars in thousands) | 2021 |  | 2020
Gross carrying amount | $ | 69,103 | ​ | $ | 67,856
Less: accumulated amortization | ​ | 60,801 | ​ | ​ | 57,125
Net carrying value | $ | 8,302 | ​ | $ | 10,731
​ | ​ | ​ | ​ | ​ | ​
Schedule of changes in amortized MSRs | ​
​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31,
(dollars in thousands) | 2021 |  | 2020
Balance at beginning of year | $ | 10,731 | ​ | $ | 12,668
Originations | ​ | 1,247 | ​ | ​ | 4,376
Amortization | ​ | (3,676) | ​ | ​ | (6,313)
Balance at end of year | $ | 8,302 | ​ | $ | 10,731
Fair value of amortized MSRs at beginning of year | $ | 14,029 | ​ | $ | 20,329
Fair value of amortized MSRs at end of year | $ | 12,243 | ​ | $ | 14,029
Balance of loans serviced for others | $ | 1,673,158 | ​ | $ | 2,189,027
Schedule of quantitative assumptions used in determining lower of cost or fair value of MSRs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021 | ​ | December 31, 2020 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​
​ |  | Range | ​ | Average | ​ | Range | ​ | Average | ​
Conditional prepayment rate | ​ | 13.77 | % | - | 25.19 | % | 14.61 | % | 11.86 | % | - | 26.52 | % | 16.90 | %
Life in years (of the MSR) | ​ | 1.99 | ​ | - | 5.31 | ​ | 5.03 | ​ | 1.83 | ​ | - | 6.68 | ​ | 4.45 | ​
Weighted-average coupon rate | ​ | 3.58 | % | - | 6.56 | % | 3.71 | % | 3.24 | % | - | 6.98 | % | 3.84 | %
Discount rate | ​ | 10.00 | % | - | 10.01 | % | 10.00 | % | 10.00 | % | - | 10.00 | % | 10.00 | %

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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