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Goodwill and Intangible Assets - Schedule of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 8,186 | $ 8,024
Accumulated Amortization | 6,402 | 5,615
Estimated amortization expense | 1,784 | 2,409
MSRs [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 912 | 750
Accumulated Amortization | 250 | 162
Estimated amortization expense | 662 | 588
Core deposit intangibles [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 7,274 | 7,274
Accumulated Amortization | 6,152 | 5,453
Estimated amortization expense | $ 1,122 | $ 1,821

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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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