Loans (Details 4) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	$ 43,880	$ 51,731
Recorded Investment, With no allowance		42,976	48,548
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	8,818	8,812
Recorded Investment, With an Allowance		8,080	8,060
Allowance for Loan Losses Allocated, With an Allowance		779	758
Residential Owner Occupied [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	2,744	2,507
Recorded Investment, With no allowance		2,597	2,364
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	1,998	1,841
Recorded Investment, With an Allowance		1,978	1,814
Allowance for Loan Losses Allocated, With an Allowance		144	137
Residential Non Owner Occupied [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	1,468	1,711
Recorded Investment, With no allowance		1,464	1,708
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	1,076	1,031
Recorded Investment, With an Allowance		1,078	1,024
Allowance for Loan Losses Allocated, With an Allowance		74	30
One To Four Family Residential Real Estate [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	4,212	4,218
Recorded Investment, With no allowance		4,061	4,072
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	3,074	2,872
Recorded Investment, With an Allowance		3,056	2,838
Allowance for Loan Losses Allocated, With an Allowance		218	167
Multi Family Residential Real Estate [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	1,863	2,095
Recorded Investment, With no allowance		1,870	2,102
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	171	175
Recorded Investment, With an Allowance		172	176
Allowance for Loan Losses Allocated, With an Allowance		2	7
Commercial Real Estate Owner Occupied [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	11,847	12,273
Recorded Investment, With no allowance		11,387	11,804
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	2,077	2,007
Recorded Investment, With an Allowance		1,616	1,546
Allowance for Loan Losses Allocated, With an Allowance		50	44
Commercial Real Estate Non Owner Occupied [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	3,035	3,085
Recorded Investment, With no allowance		2,873	2,925
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	644	651
Recorded Investment, With an Allowance		584	593
Allowance for Loan Losses Allocated, With an Allowance		42	28
Agriculture Land [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	11,682	13,029
Recorded Investment, With no allowance		11,860	13,185
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	287	293
Recorded Investment, With an Allowance		284	292
Allowance for Loan Losses Allocated, With an Allowance		32	14
Commercial Real Estate Other Receivables [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	959	981
Recorded Investment, With no allowance		748	768
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	916	909
Recorded Investment, With an Allowance		718	708
Allowance for Loan Losses Allocated, With an Allowance		40	32
Commercial Real Estate [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	27,523	29,368
Recorded Investment, With no allowance		26,868	28,682
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	3,924	3,860
Recorded Investment, With an Allowance		3,202	3,139
Allowance for Loan Losses Allocated, With an Allowance		164	118
Construction [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	0	0
Recorded Investment, With no allowance		0	0
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	0	0
Recorded Investment, With an Allowance		0	0
Allowance for Loan Losses Allocated, With an Allowance		0	0
Commercial Working Capital Or Other [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	4,888	5,462
Recorded Investment, With no allowance		4,815	5,422
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	458	447
Recorded Investment, With an Allowance		461	449
Allowance for Loan Losses Allocated, With an Allowance		62	77
Commercial Loans Other [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	4,744	9,916
Recorded Investment, With no allowance		4,757	7,644
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	293	854
Recorded Investment, With an Allowance		295	858
Allowance for Loan Losses Allocated, With an Allowance		21	110
Commercial Loan [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	9,632	15,378
Recorded Investment, With no allowance		9,572	13,066
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	751	1,301
Recorded Investment, With an Allowance		756	1,307
Allowance for Loan Losses Allocated, With an Allowance		83	187
Home Equity and Improvement [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	614	630
Recorded Investment, With no allowance		569	584
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	898	596
Recorded Investment, With an Allowance		894	592
Allowance for Loan Losses Allocated, With an Allowance		312	279
Consumer Finance [Member]
Impaired loans
Unpaid Principal Balance, With no allowance	[1]	36	42
Recorded Investment, With no allowance		36	42
Allowance for Loan Losses Allocated, With no allowance		0	0
Unpaid Principal Balance, With an Allowance	[1]	0	8
Recorded Investment, With an Allowance		0	8
Allowance for Loan Losses Allocated, With an Allowance		$ 0	$ 0

[1] Presented gross of charge offs