Earnings Per Share - Schedule of Dilutive Effect of Stock Options RSUs and PSAs (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Income	$ 13,656	$ 14,611	$ 24,268	$ 29,929
Weighted-average number of basic shares outstanding during the period	18,829	18,805	18,835	18,815
Dilutive effect of stock options, RSUs, and performance shares	191	328	285	398
Weighted-average number of diluted shares outstanding during the period	19,020	19,133	19,120	19,213
Basic earnings per share	$ 0.73	$ 0.78	$ 1.29	$ 1.59
Diluted earnings per share	$ 0.72	$ 0.76	$ 1.27	$ 1.56