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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill | The following table presents the changes in the carrying amount of goodwill for the periods presented.
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
|  | (Dollars in thousands) |
Balance, beginning of period |  | $ | 663,707 |  |  | $ | 666,539 |
Purchase accounting adjustments |  |  | - |  |  |  | (2,832 | )
Balance, end of period |  | $ | 663,707 |  |  | $ | 663,707 |
Summary of Amortizable Intangible Assets | The following summarizes changes in CDI and the related accumulated amortization for the periods presented.
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
|  | Gross CDI |  |  | Accumulated |  |  | Net CDI |  |  | Gross CDI |  |  | Accumulated |  |  | Net CDI |
|  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
|  | (Dollars in thousands) |
Balance of intangible assets, beginning of period |  | $ | 93,297 |  |  | $ | (50,311 | ) |  | $ | 42,986 |  |  | $ | 93,297 |  |  | $ | (39,513 | ) |  | $ | 53,784 |
Amortization |  |  |  |  |  |  | (9,352 | ) |  |  | (9,352 | ) |  |  |  |  |  |  | (10,798 | ) |  |  | (10,798 | )
Balance of intangible assets, end of period |  | $ | 93,297 |  |  | $ | (59,663 | ) |  | $ | 33,634 |  |  | $ | 93,297 |  |  | $ | (50,311 | ) |  | $ | 42,986 |
The following table reflects the estimated amortization expense for the periods presented, as of December 31, 2020.
|  | December 31, 2020 |
Year: |  | (Dollars in thousands) |
2021 |  | $ | 8,240 |
2022 |  |  | 7,126 |
2023 |  |  | 6,010 |
2024 |  |  | 4,892 |
2025 |  |  | 3,773 |
Thereafter |  |  | 3,593 |
Total |  | $ | 33,634 |

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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 goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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