Loans Receivable and Loans Held for Sale (Details 1) - Loans receivable - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 195,913	$ 181,607
Total past due	3,762	2,946
Total	199,675	184,553
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	1,163	1,416
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	243	520
Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 2,356	$ 1,010
Nonperforming loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current
Total past due	$ 2,356	$ 1,010
Total	$ 2,356	$ 1,010
Nonperforming loans | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Nonperforming loans | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Nonperforming loans | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 2,356	$ 1,010
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	58,636	54,698
Total past due	2,455	1,976
Total	61,091	56,674
Real estate | Residential | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	964	782
Real estate | Residential | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	99	507
Real estate | Residential | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	1,392	687
Real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	32,173	$ 30,653
Total past due	82
Total	$ 32,255	$ 30,653
Real estate | Commercial | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Real estate | Commercial | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 82
Real estate | Commercial | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Real estate | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 39,914	$ 37,843
Total past due	555	285
Total	$ 40,469	38,128
Real estate | Agricultural | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due		$ 285
Real estate | Agricultural | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Real estate | Agricultural | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 555
Construction real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 1,319	$ 940
Total past due
Total	$ 1,319	$ 940
Construction real estate | Residential | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Construction real estate | Residential | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Construction real estate | Residential | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Construction real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 2,827	$ 4,035
Total past due
Total	$ 2,827	$ 4,035
Construction real estate | Commercial | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Construction real estate | Commercial | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Construction real estate | Commercial | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Home equity, home improvement and second mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 32,793	$ 32,291
Total past due	238	450
Total	33,031	32,741
Home equity, home improvement and second mortgages | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	131	193
Home equity, home improvement and second mortgages | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	59	2
Home equity, home improvement and second mortgages | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	48	255
Operating and term | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	9,248	5,569
Total past due	303	149
Total	$ 9,551	5,718
Operating and term | Commercial | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due		$ 82
Operating and term | Commercial | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Operating and term | Commercial | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 303	$ 67
Operating and term | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 9,839	7,674
Total past due		40
Total	$ 9,839	7,714
Operating and term | Agricultural | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due		$ 40
Operating and term | Agricultural | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Operating and term | Agricultural | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due
Vehicle
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 2,659	$ 1,661
Total past due	61	10
Total	2,720	1,671
Vehicle | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	22	8
Vehicle | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	3	1
Vehicle | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	36	1
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,505	6,243
Total past due	68	36
Total	6,573	6,279
Consumer | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 46	26
Consumer | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due		$ 10
Consumer | Loans Past Due 90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 22