Allowance for Credit Losses (Non-accrual Basis By Loan Class) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loan loss allowances, financing receivable past due
Non-accrual loans, total	$ 3,881	$ 4,886
Commercial
Loan loss allowances, financing receivable past due
Non-accrual loans, total	1,649	1,901
Real estate - construction
Loan loss allowances, financing receivable past due
Non-accrual loans, total	936	938
Commercial Real Estate: Farmland and Commercial
Loan loss allowances, financing receivable past due
Non-accrual loans, total	517	1,208
Commercial Real Estate: Multifamily
Loan loss allowances, financing receivable past due
Non-accrual loans, total	152	165
Residential First Lien
Loan loss allowances, financing receivable past due
Non-accrual loans, total	624	670
Consumer
Loan loss allowances, financing receivable past due
Non-accrual loans, total	$ 3	$ 4