Stock Compensation Plans, Stock Option Activity (Details) - Stock Options [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Stock options, number of shares [Roll Forward]
Balance, beginning of period (in shares) | shares	273,622
Granted (in shares) | shares	73,361
Exercised (in shares) | shares	(14,216)
Expired (in shares) | shares	(3,583)
Balance, end of period (in shares) | shares	329,184
Stock options, weighted average exercise price [Roll Forward]
Balance, beginning of period (in dollars per share) | $ / shares	$ 7.07
Granted (in dollars per share) | $ / shares	12.41
Exercised (in dollars per share) | $ / shares	6.71
Expired (in dollars per share) | $ / shares	11.33
Balance, end of period (in dollars per share) | $ / shares	$ 8.23