Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues	$ 218,576	$ 194,618
Operating expenses	163,478	150,917
Gross margin	55,098	43,701
Selling, general and administrative expenses	71,285	66,124
Restructuring and other related charges, net	16	1,877
Operating loss	(16,203)	(24,300)
Interest expense, net	(18,605)	(9,396)
Other income (expense)	2,702	(950)
Loss before income taxes	(32,106)	(34,646)
(Provision) benefit for income taxes	(356)	355
Net loss	$ (32,462)	$ (34,291)
Loss per common share:
Basic (in dollars per share)	$ (0.86)	$ (1.11)
Diluted (in dollars per share)	$ (0.86)	$ (1.11)
Weighted-average number of shares outstanding:
Weighted-average number of basic shares outstanding (in shares)	37,697	30,878
Weighted-average number of diluted shares outstanding (in shares)	37,697	30,878