Intangible Assets [Line Items]

No definition available.

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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

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)				12 Months Ended
	Mar. 26, 2019	Oct. 17, 2017	Sep. 01, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Goodwill acquired				$ 31,358,000
Goodwill impairment loss				0	$ 0
Amortization expense for intangible assets totaled				$ 3,500,000	$ 2,000,000.0	$ 1,500,000
Wolverine Bancorp Inc [Member]
Intangible Assets [Line Items]
Goodwill acquired		$ 26,800,000
Core deposit intangible amortization period				10 years
Lafayette Community Bancorp [Member]
Intangible Assets [Line Items]
Goodwill acquired			$ 15,400,000
Core deposit intangible amortization period					10 years
Salin [Member]
Intangible Assets [Line Items]
Goodwill acquired	$ 31,200,000
Core Deposits [Member] \| Minimum [Member]
Intangible Assets [Line Items]
Core deposit intangible amortization period				7 years
Core Deposits [Member] \| Maximum [Member]
Intangible Assets [Line Items]
Core deposit intangible amortization period				10 years