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Core Deposit, Customer Relationship and Other Intangibles (Summary of Core Deposit, Customer Relationship and Other Intangibles) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Core deposit, customer relationship and other intangibles | $ 56,965 | $ 3,369
Core Deposits [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Core deposit, customer relationship and other intangibles | 43,185 | 2,481
Customer Relationships Intangible [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Core deposit, customer relationship and other intangibles | 13,213 | 888
Other Intangible Assets [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Core deposit, customer relationship and other intangibles | $ 567 | $ 0

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