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Goodwill and Other Intangible Assets (Schedule of Other Intangible Assets) (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | $ 14,043 | $ 15,476
Accumulated Amortization | (8,970) | (8,700)
Net Intangible Assets | 5,073 | 6,776
Core Deposits [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 9,300 | 9,300
Accumulated Amortization | (5,256) | (4,002)
Net Intangible Assets | 4,044 | 5,298
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 4,669 | 6,102
Accumulated Amortization | (3,683) | (4,692)
Net Intangible Assets | 986 | 1,410
Noncompete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 74 | 74
Accumulated Amortization | (31) | (6)
Net Intangible Assets | $ 43 | $ 68

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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