Loans and Allowance for Loan Losses, Information Regarding Nonperforming Assets (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2020 USD ($) Loan	Dec. 31, 2019 USD ($)
Nonperforming Assets [Abstract]
Nonaccrual loans		$ 14,575	$ 1,809
Troubled-debt restructurings	[1]	0	912
Accruing loans 90 or more days past due		1,960	612
Total nonperforming loans		$ 16,535	3,333
COVID-19 [Member]
Nonperforming Assets [Abstract]
Number of loans modified that were not considered troubled debt restructurings | Loan		8
Amount of loans modified that were not considered troubled debt restructurings		$ 33,000
Construction & Development [Member]
Nonperforming Assets [Abstract]
Nonaccrual loans		0	0
Troubled-debt restructurings	[1]	0	0
Accruing loans 90 or more days past due		0	0
Total nonperforming loans		0	0
1 - 4 Family Real Estate [Member]
Nonperforming Assets [Abstract]
Nonaccrual loans		0	0
Troubled-debt restructurings	[1]	0	0
Accruing loans 90 or more days past due		0	0
Total nonperforming loans		0	0
Commercial Real Estate - Other [Member]
Nonperforming Assets [Abstract]
Nonaccrual loans		3,043	1,809
Troubled-debt restructurings	[1]	0	0
Accruing loans 90 or more days past due		1,960	0
Total nonperforming loans		5,003	1,809
Commercial & Industrial [Member]
Nonperforming Assets [Abstract]
Nonaccrual loans		11,063	0
Troubled-debt restructurings	[1]	0	0
Accruing loans 90 or more days past due		0	14
Total nonperforming loans		11,063	14
Agricultural [Member]
Nonperforming Assets [Abstract]
Nonaccrual loans		469	0
Troubled-debt restructurings	[1]	0	912
Accruing loans 90 or more days past due		0	598
Total nonperforming loans		469	1,510
Consumer [Member]
Nonperforming Assets [Abstract]
Nonaccrual loans		0	0
Troubled-debt restructurings	[1]	0	0
Accruing loans 90 or more days past due		0	0
Total nonperforming loans		$ 0	$ 0

[1] $12.98 million and $1.81 million of TDRs as of December 31, 2020 and 2019, respectively, are included in the nonaccrual loans balance in the line above.