CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 239,492	$ 221,540	$ 441,769		$ 410,578
Operating expenses	178,576	169,426	333,851		317,334
Gross margin	60,916	52,114	107,918		93,244
Selling, general and administrative expenses	56,320	62,908	111,068		126,429
Restructuring and other related charges, net	0	0	0		16
Operating income (loss)	4,596	(10,794)	(3,150)		(33,201)
Interest expense, net	(16,691)	(18,476)	(33,432)		(37,055)
Loss on debt extinguishment	(1,582)	0	(1,582)		0
Other income, net	13	3,259	648		6,438
Loss from continuing operations before income taxes	(13,664)	(26,011)	(37,516)		(63,818)
Provision for income taxes	(2,089)	(2,191)	(2,948)		(2,717)
Net loss from continuing operations	(15,753)	(28,202)	(40,464)		(66,535)
Discontinued operations:
Net income from discontinued operations, net of income tax	0	6,650	0		12,521
Net Income (Loss) Attributable to Parent, Total	$ (15,753)	$ (21,552)	$ (40,464)	[1]	$ (54,014)	[1]
Basic net loss per common share:
Loss from continuing operations, Basic (in USD per share)	$ (3.61)	$ (6.53)	$ (9.30)		$ (16.45)
Income from discontinued operations, basic (in USD per share)	0	1.54	0		3.10
Basic (in dollars per share)	$ (3.61)	$ (4.99)	$ (9.30)		$ (13.35)
Weighted-average number of shares outstanding:
Weighted-average number of basic shares outstanding (in shares)	4,362	4,318	4,353		4,045

[1] Condensed consolidated statement of cash flows for the six months ended June 30, 2022 includes discontinued operations.