Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (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	$ 6,613	$ 29,100	$ 19,295	$ 48,742
Weighted average common shares outstanding-basic (in shares)	88,244	85,956	88,328	86,524
Plus: net effect of dilutive stock options and restricted stock units (in shares)	1,590	1,902	1,514	2,319
Weighted average common shares outstanding-diluted (in shares)	89,834	87,858	89,842	88,843
Net income per common share-basic (in dollars per share)	$ 0.07	$ 0.34	$ 0.22	$ 0.56
Net income per common share -- diluted (in dollars per share)	$ 0.07	$ 0.33	$ 0.21	$ 0.55