Loans Receivable and Loans Held for Sale (Details 2) - Loans receivable - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 2,356	$ 1,010
Loans Past Due 90 Days or More and Still Accruing
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 1,392	$ 687
Loans Past Due 90 Days or More and Still Accruing
Real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual
Loans Past Due 90 Days or More and Still Accruing
Real estate | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 555
Loans Past Due 90 Days or More and Still Accruing
Construction real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual
Loans Past Due 90 Days or More and Still Accruing
Construction real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual
Loans Past Due 90 Days or More and Still Accruing
Home equity, home improvement and second mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 48	$ 255
Loans Past Due 90 Days or More and Still Accruing
Operating and term | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 303	$ 67
Loans Past Due 90 Days or More and Still Accruing
Operating and term | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual
Loans Past Due 90 Days or More and Still Accruing
Vehicle
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 36	$ 1
Loans Past Due 90 Days or More and Still Accruing
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 22
Loans Past Due 90 Days or More and Still Accruing