Loans and Allowance for Loan Losses - Loan Risk Rating (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 807,539	$ 813,376
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	407,899	415,208
Consumer Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	186,345	187,802
Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	115,674	117,869
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	90,707	85,022
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,914	7,475
Non PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	780,938	786,183
Non PCI Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	777,194	782,438
Non PCI Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,473	1,531
Non PCI Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	332	341
Non PCI Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,939	1,873
Non PCI Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	393,216	400,265
Non PCI Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	392,338	399,505
Non PCI Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	635	640
Non PCI Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	243	120
Non PCI Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,471	178,798
Non PCI Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	176,001	177,466
Non PCI Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	514	550
Non PCI Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	103	104
Non PCI Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	853	678
Non PCI Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	114,168	116,191
Non PCI Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	113,447	115,237
Non PCI Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	87	89
Non PCI Loans [Member] | Construction and Land Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Construction and Land Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	634	865
Non PCI Loans [Member] | Construction and Land Development [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	89,169	83,454
Non PCI Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	88,723	82,992
Non PCI Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	237	252
Non PCI Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	209	210
Non PCI Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,914	7,475
Non PCI Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,685	7,238
Non PCI Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Consumer and Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	229	237
Non PCI Loans [Member] | Consumer and Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Consumer and Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,601	27,193
Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	20,590	21,173
Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,834	3,289
Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	183	12
Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,967	2,692
Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	27	27
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,683	14,943
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,617	11,836
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	890	1,045
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,176	2,062
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,874	9,004
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,816	6,811
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,280	1,577
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	778	616
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,506	1,678
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	848	1,019
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	645	645
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13	14
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,538	1,568
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,309	1,507
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	19	22
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	183	12
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	27	27
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0