Loans and Allowance (Newly Restructured Loans by Type) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination		$ 140
Total modification		140
Commercial Segment [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term		61
Total modification		61
Consumer [Member] | First Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination	$ 10	59
Total modification	10	59
Consumer [Member] | Second Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term	7	36
Total modification	7	$ 36
Consumer [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination	17
Total modification	17
Consumer [Member] | Boat/RVs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term	8
Total modification	$ 8