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Goodwill and Intangible Assets - Schedule of Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Goodwill And Intangible Assets [Line Items] |  |
Goodwill | $ 44,126 | $ 28,810
Finite-Lived Intangible Assets, Gross Carrying Amount | 31,275 | 27,831
Finite-Lived Intangible Assets, Accumulated Amortization | (11,623) | (10,110)
Finite-Lived Intangible Assets, Net Carrying Amount | 19,652 | 17,721
Core Deposit Intangibles |  |
Goodwill And Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross Carrying Amount | 29,511 | 21,825
Finite-Lived Intangible Assets, Accumulated Amortization | (11,335) | (8,423)
Finite-Lived Intangible Assets, Net Carrying Amount | 18,176 | 13,402
Other Intangible Assets |  |
Goodwill And Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross Carrying Amount | 1,764 | 6,006
Finite-Lived Intangible Assets, Accumulated Amortization | (288) | (1,687)
Finite-Lived Intangible Assets, Net Carrying Amount | $ 1,476 | $ 4,319

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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 Amount before 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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