Stock Based Compensation, Stock Option Activity (Details) - Stock Options [Member] - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Options outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	83,861	99,810
Granted (in shares)	0	0
Exercised (in shares)	0	(13,449)
Expired (in shares)	(7,802)	(2,500)
Outstanding at end of period (in shares)	76,059	83,861
Exercisable at end of period (in shares)	74,314	75,072
Weighted average exercise price [Roll forward]
Outstanding at beginning of period (in dollars per share)	$ 12.39	$ 12.16
Granted (in dollars per shares)	0.00	0.00
Exercised (in dollars per share)	0.00	11.31
Expired (in dollars per share)	18.76	9.00
Outstanding at end of period (in dollars per share)	11.73	12.39
Exercisable at end of period (in dollars per share)	$ 11.71	$ 12.40