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Loans and Allowance for Loan and Lease Losses - Schedule of Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) loan	Sep. 30, 2017 USD ($) loan
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | loan	14
Pre-Modification Outstanding Recorded Investment	$ 1,249
Post-Modification Outstanding Recorded Investment	$ 1,249
1-4 family residential properties
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | loan	3
Pre-Modification Outstanding Recorded Investment	$ 111
Post-Modification Outstanding Recorded Investment	$ 111
Commercial Loans
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | loan	10	5
Pre-Modification Outstanding Recorded Investment	$ 875	$ 2,184
Post-Modification Outstanding Recorded Investment	$ 875	$ 2,184
Farmland
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | loan	1
Pre-Modification Outstanding Recorded Investment	$ 263
Post-Modification Outstanding Recorded Investment	$ 263

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Number of financing receivables that have been modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

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-Topic 310
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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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