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Components of Other Intangible Assets, by Reporting Unit (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Finite lived intangibles, net | $ 7,165 |
Total other intangible assets, net | 7,207 | $ 5,243
Core deposit intangible assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Core deposit intangibles | 11,536 | 12,282
Accumulated amortization | (4,515) | (7,958)
Finite lived intangibles, net | 7,021 | 4,324
Other Intangible Assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Core deposit intangibles | 3,508 | 4,246
Accumulated amortization | (3,322) | (3,327)
Finite lived intangibles, net | $ 186 | 919
Community Banking |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total other intangible assets, net |  | 4,395
Community Banking | Core deposit intangible assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Core deposit intangibles |  | 12,282
Accumulated amortization |  | (7,958)
Finite lived intangibles, net |  | 4,324
Community Banking | Other Intangible Assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Core deposit intangibles |  | 535
Accumulated amortization |  | (464)
Finite lived intangibles, net |  | 71
Insurance Services |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total other intangible assets, net |  | 848
Insurance Services | Other Intangible Assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Core deposit intangibles |  | 3,711
Accumulated amortization |  | (2,863)
Finite lived intangibles, net |  | $ 848

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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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- 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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