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Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
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Finite-Lived Intangible Assets [Line Items] |  |
Other intangible assets | $ 15,700 | $ 6,345
Core deposits [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Other intangible assets | 12,833 | 3,005
Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Other intangible assets | 2,463 | 2,828
Non-compete agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Other intangible assets | $ 404 | $ 512

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- Definition Amount after 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=26713463&loc=d3e16323-109275 + Details
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