CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 251,265	$ 238,873	$ 469,841	$ 433,491
Operating expenses	181,312	176,109	344,790	327,026
Gross margin	69,953	62,764	125,051	106,465
Selling, general and administrative expenses	72,733	68,478	144,018	134,602
Restructuring and other related charges, net	0	280	16	2,157
Operating loss	(2,780)	(5,994)	(18,983)	(30,294)
Interest expense, net	(18,480)	(9,598)	(37,085)	(18,994)
Other income (expense)	1,476	(1,044)	4,178	(1,994)
Loss before income taxes	(19,784)	(16,636)	(51,890)	(51,282)
Provision for income taxes	(1,768)	(857)	(2,124)	(502)
Net loss	$ (21,552)	$ (17,493)	$ (54,014)	$ (51,784)
Loss per common share:
Basic (in dollars per share)	$ (0.50)	$ (0.57)	$ (1.34)	$ (1.68)
Diluted (in dollars per share)	$ (0.50)	$ (0.57)	$ (1.34)	$ (1.68)
Weighted-average number of shares outstanding:
Weighted-average number of basic shares outstanding (in shares)	43,179	30,940	40,454	30,909
Weighted-average number of diluted shares outstanding (in shares)	43,179	30,940	40,454	30,909