Stock Based Compensation, Stock Option Activity (Details) - Stock Options [Member] - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Options outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	24,669	83,861
Exercised (in shares)	(3,398)	0
Expired (in shares)	(1,006)	(7,802)
Outstanding at end of period (in shares)	20,265	76,059
Exercisable at end of period (in shares)	20,265	74,314
Weighted average exercise price [Roll forward]
Outstanding at beginning of period (in dollars per share)	$ 12.17	$ 12.39
Exercised (in dollars per share)	14.94	0.00
Expired (in dollars per share)	17.88	18.76
Outstanding at end of period (in dollars per share)	11.42	11.73
Exercisable at end of period (in dollars per share)	$ 11.42	$ 11.71