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Loans and Allowance for Loan Losses - Loan Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 1,836,989	$ 1,777,239
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	878,587	860,027
Consumer Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	406,256	407,254
Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	204,696	187,895
Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	335,498	308,254
Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,952	13,809
Non PCI Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,805,331	1,743,081
Non PCI Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,779,981	1,728,896
Non PCI Loans [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	20,900	10,758
Non PCI Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,845	309
Non PCI Loans [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,403	2,915
Non PCI Loans [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	202	203
Non PCI Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	861,547	842,345
Non PCI Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	848,287	834,912
Non PCI Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	12,387	6,791
Non PCI Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	500	0
Non PCI Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	373	642
Non PCI Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	398,844	398,542
Non PCI Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	395,438	394,728
Non PCI Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,353	2,678
Non PCI Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8	14
Non PCI Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	875	1,122
Non PCI Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	170	0
Non PCI Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	200,027	183,293
Non PCI Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	198,469	182,524
Non PCI Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	624	64
Non PCI Loans [Member] | Construction and Land Development [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	156	158
Non PCI Loans [Member] | Construction and Land Development [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	778	547
Non PCI Loans [Member] | Construction and Land Development [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	333,361	305,697
Non PCI Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	326,328	303,805
Non PCI Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,492	1,090
Non PCI Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,181	137
Non PCI Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	352	462
Non PCI Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8	203
Non PCI Loans [Member] | Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,552	13,204
Non PCI Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,459	12,927
Non PCI Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	44	135
Non PCI Loans [Member] | Consumer and Other [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Non PCI Loans [Member] | Consumer and Other [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	25	142
Non PCI Loans [Member] | Consumer and Other [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	24	0
Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	31,658	34,158
Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	23,814	26,623
Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	4,026	3,147
Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,361	1,536
Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,457	2,852
Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	17,040	17,682
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	12,795	14,050
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,463	1,805
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	920	1,030
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	862	797
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,412	8,712
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,050	5,617
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	453	756
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	434	446
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,475	1,893
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	4,669	4,602
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,576	4,033
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,093	569
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,137	2,557
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,039	2,382
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	50
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	95	125
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	400	605
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	354	541
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	14	17
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7	10
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	25	37
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 0	$ 0

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