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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Other Intangible Assets |
Schedule of carrying amount of goodwill by operating segment | The carrying amount of goodwill by operating segment, at December 31, 2020 and 2019 is as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ |  | 2020 |  | 2019
Goodwill: | ​ | ​ | ​ | ​ | ​ | ​
Banking | ​ | $ | 288,436 | ​ | $ | 288,436
Remittance Processing | ​ | ​ | 8,992 | ​ | ​ | 8,992
Wealth Management | ​ |  | 14,108 | ​ |  | 14,108
Total goodwill | ​ | $ | 311,536 | ​ | $ | 311,536
Schedule of other intangible asset disclosures | Core deposit and customer relationship intangible assets are amortized over the estimated period benefited. Intangible asset disclosures are as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of and for the Years Ended December 31,
​ | ​ | 2020 | ​ | 2019
​ | ​ | ​ | ​ | ​ | Customer | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Customer | ​ | ​ | ​
​ | ​ | Core deposit | ​ | relationship | ​ | ​ | ​ | Core deposit | ​ | relationship | ​ | ​ | ​
​ |  | intangible |  | intangible |  | Total |  | intangible |  | intangible |  | Total
Intangible assets, gross | ​ | $ | 90,256 | ​ | $ | 24,608 | ​ | $ | 114,864 | ​ | $ | 90,256 | ​ | $ | 24,208 | ​ | $ | 114,464
Accumulated amortization | ​ | ​ | 46,909 | ​ | ​ | 15,970 | ​ | ​ | 62,879 | ​ | ​ | 39,156 | ​ | ​ | 13,715 | ​ | ​ | 52,871
Intangible assets, net | ​ | $ | 43,347 | ​ | $ | 8,638 | ​ | $ | 51,985 | ​ | $ | 51,100 | ​ | $ | 10,493 | ​ | $ | 61,593
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization expense | ​ | $ | 7,753 | ​ | $ | 2,255 | ​ | $ | 10,008 | ​ | $ | 7,963 | ​ | $ | 1,584 | ​ | $ | 9,547
Schedule of carrying amount of amortized intangible assets | Future expense for the amortization of intangible assets, as estimated at December 31, 2020, is summarized in the table below for the periods presented (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Customer | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Core deposit | ​ | relationship | ​ | ​
Estimated amortization expense at December 31, 2020: | ​ | intangible | ​ | intangible | ​ | Total
2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 7,259 | ​ | $ | 2,060 | ​ | $ | 9,319
2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 6,749 | ​ |  | 1,797 | ​ |  | 8,546
2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 6,226 | ​ |  | 1,469 | ​ |  | 7,695
2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 5,686 | ​ |  | 1,141 | ​ |  | 6,827
2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4,915 | ​ | ​ | 879 | ​ | ​ | 5,794
Thereafter | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 12,512 | ​ | ​ | 1,292 | ​ | ​ | 13,804
Total estimated amortization expense | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 43,347 | ​ | $ | 8,638 | ​ | $ | 51,985

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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 and the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, roll forward schedule. + References No definition available. + Details
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