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Loans and Allowance for Loan and Lease Losses - Schedule of Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) loan	Jun. 30, 2017 USD ($) loan
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | loan	5
Pre-Modification Outstanding Recorded Investment	$ 186
Post-Modification Outstanding Recorded Investment	$ 186
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	2	4
Pre-Modification Outstanding Recorded Investment	$ 75	$ 186
Post-Modification Outstanding Recorded Investment	$ 75	$ 186

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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