Net (Loss) Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ (13,473)	$ 31,667	$ 40,518
Basic weighted-average common shares outstanding (in shares)	54,134	38,988	38,233
Effect of dilutive stock options (in shares)	0	75	61
Effect of dilutive restricted stock (in shares)	0	1,050	1,207
Diluted weighted-average common shares outstanding (in shares)	54,134	40,113	39,501
Basic income per common share (in dollars per share)	$ (0.25)	$ 0.81	$ 1.06
Diluted income per common share (in dollars per share)	$ (0.25)	$ 0.79	$ 1.03
Antidilutive securities excluded from diluted net income per common share (in shares)	3,175	50	424