Loans (Details 8) - Subsequently Defaulted [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Number	Mar. 31, 2017 USD ($) Number
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	1	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 197	$ 0
1-4 Family Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
1-4 Family Non Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Commercial Real Estate Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Commercial Real Estate Non Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Agriculture Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Commercial Real Estate Other Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Commercial Working Capital Or Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Commercial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	1	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 197	$ 0
Home Equity and Improvement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0
Consumer Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Number	0	0
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $	$ 0	$ 0