Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets:
Available for sale debt securities, fair value	$ 216,170	$ 214,512
Mortgage servicing rights, fair value	2,877	2,584
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Available for sale debt securities, fair value	0	0
Mortgage servicing rights, fair value	0	0
Other Observable Inputs (Level 2)
Assets:
Available for sale debt securities, fair value	216,170	214,512
Mortgage servicing rights, fair value	0	0
Significant Unobservable Inputs (Level 3)
Assets:
Available for sale debt securities, fair value	0	0
Mortgage servicing rights, fair value	2,877	2,584
Recurring
Assets:
Assets, Total	219,047	217,096
Recurring | U.S. government and federal agency obligations
Assets:
Available for sale debt securities, fair value	13,271	13,364
Recurring | Government sponsored enterprises
Assets:
Available for sale debt securities, fair value	35,190	32,459
Recurring | Obligations of states and political subdivisions
Assets:
Available for sale debt securities, fair value	46,397	42,032
Recurring | Mortgage-backed securities
Assets:
Available for sale debt securities, fair value	121,312	126,657
Recurring | Mortgage servicing rights
Assets:
Mortgage servicing rights, fair value	2,877	2,584
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Assets, Total	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and federal agency obligations
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government sponsored enterprises
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of states and political subdivisions
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage servicing rights
Assets:
Mortgage servicing rights, fair value	0	0
Recurring | Other Observable Inputs (Level 2)
Assets:
Assets, Total	216,170	214,512
Recurring | Other Observable Inputs (Level 2) | U.S. government and federal agency obligations
Assets:
Available for sale debt securities, fair value	13,271	13,364
Recurring | Other Observable Inputs (Level 2) | Government sponsored enterprises
Assets:
Available for sale debt securities, fair value	35,190	32,459
Recurring | Other Observable Inputs (Level 2) | Obligations of states and political subdivisions
Assets:
Available for sale debt securities, fair value	46,397	42,032
Recurring | Other Observable Inputs (Level 2) | Mortgage-backed securities
Assets:
Available for sale debt securities, fair value	121,312	126,657
Recurring | Other Observable Inputs (Level 2) | Mortgage servicing rights
Assets:
Mortgage servicing rights, fair value	0	0
Recurring | Significant Unobservable Inputs (Level 3)
Assets:
Assets, Total	2,877	2,584
Recurring | Significant Unobservable Inputs (Level 3) | U.S. government and federal agency obligations
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Government sponsored enterprises
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Obligations of states and political subdivisions
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities
Assets:
Available for sale debt securities, fair value	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights
Assets:
Mortgage servicing rights, fair value	$ 2,877	$ 2,584