Loans and Leases Held for Investment and Credit Quality - Composition of Loans and Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 2,639,840	$ 1,850,480
Net Deferred Costs	11,400	5,960
Discount on SBA 7(a) and USDA Unguaranteed	(3,941)	(13,021)
Loans and Leases, Net of Unearned	2,647,299	1,843,419
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	894,997	618,748
Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	347,318	248,904
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,052,793	739,030
Commercial Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	344,732	243,798
Agriculture | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	9,344	6,400
Agriculture | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	44,571	43,454
Agriculture | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	50,365	53,085
Agriculture | Commercial Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	344,732	243,798
Funeral Home & Cemetery | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	26,388	17,378
Funeral Home & Cemetery | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	9,033	9,874
Funeral Home & Cemetery | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	113,517	71,344
Healthcare | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	45,581	51,082
Healthcare | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	94,742	81,619
Healthcare | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	247,625	188,531
Independent Pharmacies | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	106,096	108,783
Independent Pharmacies | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	443	2,149
Independent Pharmacies | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	26,379	20,597
Registered Investment Advisors | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	99,191	94,338
Registered Investment Advisors | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	2,404	1,232
Registered Investment Advisors | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	7,431	7,905
Veterinary Industry | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	51,251	45,604
Veterinary Industry | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	22,132	14,094
Veterinary Industry | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	146,319	136,721
Other Industries | Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	557,146	295,163
Other Industries | Construction & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	173,993	96,482
Other Industries | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 461,157	$ 260,847