Loans and Allowance for Loan Losses - Schedule of Aging of Recorded Investment in Past-due Loans, by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 8,768	$ 2,407
Loans Not Past Due	1,065,434	945,475
Total	1,074,202	947,882
Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,474
Loans Not Past Due	402,279	350,622
Total	404,753	350,622
Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	435	218
Loans Not Past Due	112,522	102,363
Total	112,957	102,581
Construction and land development
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	133
Loans Not Past Due	129,666	82,586
Total	129,799	82,586
Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,419	2,176
Loans Not Past Due	393,207	371,072
Total	398,626	373,248
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		13
Loans Not Past Due	8,274	6,849
Total	8,274	6,862
Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	307
Loans Not Past Due	19,486	31,983
Total	19,793	31,983
30 - 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,134	1,967
30 - 59 Days Past Due [Member] | Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,474
30 - 59 Days Past Due [Member] | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	220
30 - 59 Days Past Due [Member] | Construction and land development
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	133
30 - 59 Days Past Due [Member] | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,967
30 - 59 Days Past Due [Member] | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	307
60 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	563	209
60 - 89 Days Past Due [Member] | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	563	209
Greater than 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,071	231
Greater than 89 Days Past Due [Member] | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	215	218
Greater than 89 Days Past Due [Member] | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 4,856
Greater than 89 Days Past Due [Member] | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 13