Schedule of Goodwill and Purchased Intangible Assets [Line Items]

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Topic 350
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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Goodwill And Purchased Intangible Assets [Line Items]
Impairment of goodwill	$ 0
Mortgage Servicing Rights
Schedule Of Goodwill And Purchased Intangible Assets [Line Items]
Impairment of intangible assets		$ 22
Core Deposits
Schedule Of Goodwill And Purchased Intangible Assets [Line Items]
Core deposit intangibles, estimated useful life		92 months
Amortization expense		$ 798	$ 679