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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible assets at December 31, 2020 and 2019 are summarized as follows (in thousands):
| 2020 |  | 2019
Goodwill | $ | 443,001 |  |  | 420,562 |
Core deposit premiums | 1,112 |  |  | 1,753 |
Customer relationship and other intangibles | 21,466 |  |  | 14,142 |
Mortgage servicing rights | 633 |  |  | 562 |
Total intangible assets | $ | 466,212 |  |  | 437,019 |
Amortization Expense of Intangible Assets | Amortization expense of intangible assets for the years ended December 31, 2020, 2019 and 2018 is as follows (in thousands):
| 2020 |  | 2019 |  | 2018
Core deposit premiums | $ | 824 |  |  | 786 |  |  | 931 |
Customer relationship and other intangibles | 2,457 |  |  | 1,869 |  |  | 1,073 |
Mortgage servicing rights | 144 |  |  | 85 |  |  | 123 |
Total amortization expense of intangible assets | $ | 3,425 |  |  | 2,740 |  |  | 2,127 |
Scheduled Amortization of Core Deposit Intangibles | Scheduled amortization of core deposit premiums and customer relationship and other intangibles for each of the next five years is as follows (in thousands):
Year ended December 31, |  | Scheduled Amortization
2021 |  | $ | 3,513 |
2022 |  | 3,143 |
2023 |  | 2,771 |
2024 |  | 2,432 |
2025 |  | 2,206 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: 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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- 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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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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 + Details
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