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Loans and Allowance for Loan Losses - Loan Risk Rating (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 2,145,292	$ 1,903,248
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,009,035	905,306
Consumer Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	488,773	423,338
Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	253,445	227,626
Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	377,173	337,075
Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	16,866	9,903
All Other Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,109,806	1,876,261
All Other Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,995,430	1,828,124
All Other Loans [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	101,832	39,084
All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,993	5,828
All Other Loans [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,315	2,979
All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	236	246
All Other Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	992,446	890,051
All Other Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	903,306	860,447
All Other Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	81,277	25,180
All Other Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,225	4,057
All Other Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	638	367
All Other Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
All Other Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	476,823	416,797
All Other Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	468,494	413,192
All Other Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,697	989
All Other Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	748	738
All Other Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,722	1,713
All Other Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	162	165
All Other Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	246,966	223,168
All Other Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	238,701	216,459
All Other Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,587	6,089
All Other Loans [Member] | Construction and Land Development [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
All Other Loans [Member] | Construction and Land Development [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	678	620
All Other Loans [Member] | Construction and Land Development [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
All Other Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	377,030	336,668
All Other Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	368,506	328,564
All Other Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,233	6,786
All Other Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,020	1,033
All Other Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	221	228
All Other Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	50	57
All Other Loans [Member] | Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	16,541	9,577
All Other Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	16,423	9,462
All Other Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	38	40
All Other Loans [Member] | Consumer and Other [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
All Other Loans [Member] | Consumer and Other [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	56	51
All Other Loans [Member] | Consumer and Other [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	24	24
Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	35,486	26,987
Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	23,859	18,974
Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,689	5,841
Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	80	199
Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	4,858	1,973
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	16,589	15,255
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,220	12,473
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,189	2,234
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	21	139
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,159	409
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	11,950	6,541
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,122	5,258
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	743	38
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	59	60
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,026	1,185
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	6,479	4,458
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,169	902
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,743	3,556
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	567	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	143	407
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	48	41
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	95	366
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	325	326
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	300	300
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	14	13
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11	13
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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