Federal Home Loan Bank Advances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
FHLB Advances:
Average balance outstanding during the year	$ 71,940	$ 80,875
Maximum amount outstanding at any month-end during the year	85,000	84,500
Balance outstanding at end of year	$ 85,000	$ 72,000
Weighted average interest rate at end of year	1.94%	2.15%
Average cost of advances during the year	2.13%	2.24%
Weighted average maturity (in months)	13 months	24 months
General borrowing limit	30.00%
FHLB advances, remaining amount available to borrow	$ 39,000
Scheduled maturities of certificates of deposit for the next five years
2017	49,500
2018	27,500
2019	8,000
Total	85,000	$ 72,000
First mortgage loans
FHLB Advances:
FHLB advances, collateral real estate loans	$ 161,100	$ 135,200