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v3.19.3.a.u2

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Goodwill [Roll Forward] |  |  |
Beginning balance | $ 274,769 | $ 268,043 |
Goodwill acquired | 0 | 6,726 |
Ending balance | 274,769 | 274,769 | $ 268,043
Finite-Lived Intangible Assets [Abstract] |  |  |
Gross carrying amount | 43,574 | 43,598 |
Less: accumulated amortization | 31,554 | 27,999 |
Net carrying amount | 12,020 | 15,599 |
Impairment of goodwill | 0 | 0 |
Amortization Expense [Abstract] |  |  |
Amortization of intangible assets | 3,579 | 4,042 | $ 3,960
Future Amortization Expense [Abstract] |  |  |
2020 | 3,000 |  |
2021 | 2,300 |  |
2022 | 1,800 |  |
2023 | 1,400 |  |
2024 | 1,100 |  |
Thereafter | 2,400 |  |
Impairment of intangible assets | $ 0 | 0 |
Minimum [Member] |  |  |
Finite-Lived Intangible Assets [Abstract] |  |  |
Intangible asset useful life | 1 year |  |
Maximum [Member] |  |  |
Finite-Lived Intangible Assets [Abstract] |  |  |
Intangible asset useful life | 20 years |  |
Core Deposits Intangibles [Member] |  |  |
Finite-Lived Intangible Assets [Abstract] |  |  |
Gross carrying amount | $ 8,951 | 8,975 |
Less: accumulated amortization | 7,988 | 7,377 |
Net carrying amount | 963 | 1,598 |
Identified Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets [Abstract] |  |  |
Gross carrying amount | 34,623 | 34,623 |
Less: accumulated amortization | 23,566 | 20,622 |
Net carrying amount | $ 11,057 | $ 14,001 |

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