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Goodwill, Core Deposit Intangible and Other Intangible Assets - Additional Information (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |  |
Other intangible assets, net | $ 16,756,000 | $ 19,826,000 |
Trademark |  |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |  |
Other intangible assets, net | $ 36,000 | $ 50,000 | $ 51,000

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount after accumulated amortization of finite-lived and indefinite-lived intangible assets classified as other. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |