Loans and Allowance for Credit Losses - Schedule of Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	$ 3,626	$ 554	$ 17,750	$ 6,923
Number of Loans | loan	14	1	23	7
Extended Amortization Period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	$ 123	$ 554	$ 8,208	$ 1,649
Payment Deferrals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	3,503	0	9,542	84
AB Note Restructure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	0	0	0	4,597
Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	0	0	0	593
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications		$ 0	$ 246	$ 4,597
Number of Loans | loan		0	2	1
Commercial real estate | Extended Amortization Period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications		$ 0	$ 0	$ 0
Commercial real estate | Payment Deferrals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications		0	246	0
Commercial real estate | AB Note Restructure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications		0	0	4,597
Commercial real estate | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications		0	0	0
Construction, land development, land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			$ 8
Number of Loans | loan			1
Construction, land development, land | Extended Amortization Period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			$ 8
Construction, land development, land | Payment Deferrals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			0
Construction, land development, land | AB Note Restructure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			0
Construction, land development, land | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			0
Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			$ 3,486
Number of Loans | loan			1
Farmland | Extended Amortization Period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			$ 3,486
Farmland | Payment Deferrals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			0
Farmland | AB Note Restructure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			0
Farmland | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications			0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	$ 3,626	$ 554	$ 14,010	$ 2,326
Number of Loans | loan	14	1	19	6
Commercial | Extended Amortization Period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	$ 123	$ 554	$ 4,714	$ 1,649
Commercial | Payment Deferrals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	3,503	0	9,296	84
Commercial | AB Note Restructure
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	0	0	0	0
Commercial | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Modifications	$ 0	$ 0	$ 0	$ 593