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Business Combination - Additional Information (Detail) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jul. 15, 2016 USD ($) $ / shares | Sep. 30, 2016 USD ($) Branches | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) Branches | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Merger costs |  | $ 266 | $ 0 | $ 481 | $ 0 |
Gross loans acquired |  | 126,134 |  | 126,134 |  |
Combined yield and credit mark |  | 4,098 |  | 4,098 |  |
Goodwill arising from Acquisition |  | $ 38,967 |  | $ 38,967 |  | $ 27,194
Lake National Bank of Mentor, Ohio [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Share price | $ / shares | $ 22.50 |  |  |  |  |
Aggregate cash paid | $ 24,750 |  |  |  |  |
Number of branches | Branches |  | 2 |  | 2 |  |
Merger costs |  | $ 266 |  | $ 481 |  |
Deferred tax asset included in accrued interest receivable and other assets |  | $ 249 |  | $ 249 |  |
Goodwill arising from Acquisition | $ 11,773 |  |  |  |  |

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- Definition The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(3)(ii)(A)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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