Loans and Allowance for Loan Losses - Loan Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 2,404,057	$ 1,897,392
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,030,651	905,306
Consumer Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	440,310	417,482
Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	275,172	227,626
Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	644,498	337,075
Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,426	9,903
All Other Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,369,974	1,870,405
All Other Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,941,395	1,822,268
All Other Loans [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	413,918	39,084
All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,395	5,828
All Other Loans [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,051	2,979
All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	215	246
All Other Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,014,182	890,051
All Other Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	666,865	860,447
All Other Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	336,122	25,180
All Other Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	10,547	4,057
All Other Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	648	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	429,509	410,941
All Other Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	394,794	407,336
All Other Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	32,578	989
All Other Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	463	738
All Other Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,588	1,713
All Other Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	86	165
All Other Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	268,763	223,168
All Other Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	247,424	216,459
All Other Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	21,269	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	70	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	644,181	336,668
All Other Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	619,308	328,564
All Other Loans [Member] | Commercial and Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	23,655	6,786
All Other Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	385	1,033
All Other Loans [Member] | Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	728	228
All Other Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	105	57
All Other Loans [Member] | Consumer and Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,339	9,577
All Other Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,004	9,462
All Other Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	294	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	17	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	34,083	26,987
Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	18,897	18,974
Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,577	5,841
Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	75	199
Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,534	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	16,469	15,255
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,248	12,473
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,819	2,234
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	19	139
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,383	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	10,801	6,541
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,974	5,258
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	255	38
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	56	60
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,516	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	6,409	4,458
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,383	902
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	4,491	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	535	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	317	407
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	222	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	87	326
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	70	300
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	12	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	5	13
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 0	$ 0