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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | May 19, 2017
--- | --- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |  |
Other intangible assets, net | $ 2,252 | $ 2,857 |
Goodwill | 17,518 | 17,518 |
Core Deposits Intangible [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Other intangible assets, net | $ 2,252 | $ 2,857 |
Northwest Bank Branches [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill |  |  | $ 15,000
Northwest Bank Branches [Member] | Core Deposits Intangible [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Other intangible assets, net |  |  | $ 4,000

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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