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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.

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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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Balance Type:	debit
Period Type:	instant

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- Details

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