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Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts			0	0
Number of contracts	3	1	3	1
Pre Modification Outstanding Recorded Investment	$ 2,130	$ 38	$ 2,130	$ 38
Post Modification Outstanding Recorded Investment, net of related allowance	$ 1,441	$ 38	$ 1,441	$ 38
Commercial real estate - mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 0	$ 0
Consumer real estate - mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	1	1	1	1
Pre Modification Outstanding Recorded Investment	$ 712	$ 38	$ 712	$ 38
Post Modification Outstanding Recorded Investment, net of related allowance	$ 626	$ 38	$ 626	$ 38
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	1	0	1	0
Pre Modification Outstanding Recorded Investment	$ 21	$ 0	$ 21	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 19	$ 0	$ 19	$ 0
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	1	0	1	0
Pre Modification Outstanding Recorded Investment	$ 1,397	$ 0	$ 1,397	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 796	$ 0	$ 796	$ 0
Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 0	$ 0

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524

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