Stock Based Compensation, Restricted Shares (Details) - Stock Incentive Plan [Member] - Restricted Shares [Member] - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Based Compensation [Abstract]
Award vesting period	3 years
Recognition period for total unrecognized compensation costs	3 years
Non-Vested Restricted Shares [Roll Forward]
Nonvested at beginning of period (in shares)	18,062	18,045
Granted (in shares)	11,294	15,664
Vested (in shares)	(6,419)	(9,123)
Forfeited (in shares)	(368)	0
Nonvested at end of period (in shares)	22,569	24,586
Non-Vested Restricted Shares, Weighted Average Fair Value [Roll Forward]
Nonvested at beginning of period (in dollars per share)	$ 16.44	$ 15.04
Granted (in dollars per share)	21.47	17.50
Vested (in dollars per share)	21.47	16.74
Forfeited (in dollars per share)	21.47	0
Nonvested at end of period (in dollars per share)	$ 17.98	$ 15.98
Certain Executive Officers [Member]
Stock Based Compensation [Abstract]
Compensation expense	$ 31,000	$ 30,000
Unrecognized compensation cost	$ 249,000	$ 295,000
Non-Vested Restricted Shares [Roll Forward]
Granted (in shares)	7,333	10,525
Non Employee Director [Member]
Stock Based Compensation [Abstract]
Compensation expense	$ 85,000	$ 90,000
Non-Vested Restricted Shares [Roll Forward]
Granted (in shares)	3,961	5,139