Earnings per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic earnings per share
Net income	$ 33,719	$ 709
Average common shares outstanding (in shares)	55,271	51,803
Net income per share (in dollars per share)	$ 0.61	$ 0.01
Diluted earnings per share
Average common shares outstanding (in shares)	55,271	51,803
Add: Dilutive effect of employee restricted stock and stock options (in shares)	721	481
Average diluted shares outstanding (in shares)	55,992	52,284
Net income per share (in dollars per share)	$ 0.60	$ 0.01