Loans and Allowance for Loan Losses - Non Accrual Loans and Loans Past Due 90 Days Or More and Still Accruing (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Loan portfolio past due loans
Nonaccrual	$ 2,653	$ 2,109
Total Loans Greater than 90 Days & Accruing	4,019	2,569
Mortgage warehouse lines of credit
Loan portfolio past due loans
Nonaccrual		233
Residential real estate
Loan portfolio past due loans
Nonaccrual	630	740
Total Loans Greater than 90 Days & Accruing	175	1,851
Commercial and commercial real estate
Loan portfolio past due loans
Nonaccrual	1,809	1,118
Total Loans Greater than 90 Days & Accruing	1,622	486
Agricultural production and real estate
Loan portfolio past due loans
Nonaccrual	195
Total Loans Greater than 90 Days & Accruing	2,221	231
Consumer and margin loans
Loan portfolio past due loans
Nonaccrual	19	18
Total Loans Greater than 90 Days & Accruing	$ 1	$ 1