Summary of Stock Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Options outstanding	136,234	147,538
Options granted	0
Options exercised	(11,304)
Options outstanding weighted average exercise price	$ 33.71	$ 33.48
Options outstanding weighted average exercise price - Granted	0
Options outstanding weighted average exercise price - Exercised	$ 30.67
Options outstanding weighted average remaining term	6 years	6 years 8 months 5 days
Options outstanding weighted average grant date fair value	$ 1,674	$ 1,782
Options granted weighted average grant date fair value	$ 0
Options exercised weighted average grant date fair value	$ (108)
Options exercisable at September 30, 2019	108,410
Options exerciseable weighted average exercise price	$ 31.68
Options exercisable weighted average remaining term	5 years 5 months
Options vested weighted average grant date fair value	$ 0
Options vested during six months ended June 30, 2019	0
Options exercisable weighted average grant date fair value	$ 1,239