Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 18,035	$ 21,136	$ 37,330	$ 69,878
Weighted average common shares outstanding-basic (in shares)	88,531	86,324	88,397	88,190
Plus: net effect of dilutive stock options and restricted stock units (in shares)	1,697	2,000	1,579	2,251
Weighted average common shares outstanding-diluted (in shares)	90,228	88,324	89,976	90,441
Net income per common share -- basic (in dollars per share)	$ 0.20	$ 0.24	$ 0.42	$ 0.79
Net income per common share -- diluted (in dollars per share)	$ 0.20	$ 0.24	$ 0.42	$ 0.77