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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net Income	$ 20,312	$ 13,656	$ 38,663	$ 24,268
Weighted-average number of basic shares outstanding during the period	18,843	18,829	18,864	18,835
Dilutive effect of stock options, RSUs, and performance shares	179	191	214	285
Weighted-average number of diluted shares outstanding during the period	19,022	19,020	19,078	19,120
Basic earnings per share	$ 1.08	$ 0.73	$ 2.05	$ 1.29
Diluted earnings per share	$ 1.07	$ 0.72	$ 2.03	$ 1.27