Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Line Items]
Gain (Loss) on Sale of Mortgage Loans	$ 6,430,000	$ 6,076,000	$ 4,449,000
Loan Commitments To Third Party Investors	31,251,000
Participating Mortgage Loans, Mortgage Obligations, Amount	16,467,000
Interest and Fee Income, Loans Held-for-sale, Mortgages	$ 14,784,000
Loan Non Accrual Period	90 days
Loan Accrual Period	90 days
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 76,179,000	57,272,000
Real Estate Owned, Valuation Allowance, Ending Balance	612,000	1,748,000
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	181,000	439,000
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	60,000	68,000
Cash, FDIC Insured Amount	250,000
Standby Letters of Credit [Member]
Accounting Policies [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 4,397,000	$ 1,484,000
Building and Building Improvements [Member]
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	39 years
Minimum [Member]
Accounting Policies [Line Items]
Period of issuance and closing range	30 days
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Accounting Policies [Line Items]
Period of issuance and closing range	45 days
Property, Plant and Equipment, Useful Life	7 years
Stock Incentive Plan 2015 [Member]
Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	60,000