CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Income Statement [Abstract]
Revenues	$ 206,715	$ 218,339	$ 648,484		$ 628,917
Operating expenses	153,928	162,322	487,779		479,656
Gross margin	52,787	56,017	160,705		149,261
Selling, general and administrative expenses	54,045	57,746	165,113		184,174
Restructuring and other related charges, net	0	0	0		16
Operating loss	(1,258)	(1,729)	(4,408)		(34,929)
Interest expense, net	(10,067)	(26,653)	(43,499)		(63,708)
Loss on debt extinguishment	(3)	0	(1,585)		0
Other income, net	266	3,227	914		9,664
Loss from continuing operations before income taxes	(11,062)	(25,155)	(48,578)		(88,973)
Provision for income taxes	(1,072)	(1,465)	(4,020)		(4,182)
Net loss from continuing operations	(12,134)	(26,620)	(52,598)		(93,155)
Discontinued operations:
Net income from discontinued operations, net of income tax	0	3,747	0		16,268
Net Income (Loss) Attributable to Parent, Total	$ (12,134)	$ (22,873)	$ (52,598)	[1]	$ (76,887)	[1]
Basic net loss per common share:
Loss from continuing operations, Basic (in usd per share)	$ (2.78)	$ (6.16)	$ (12.07)		$ (22.51)
Income from discontinued operations, basic (in usd per share)	0	0.87	0		3.93
Basic (in usd per share)	$ (2.78)	$ (5.29)	$ (12.07)		$ (18.58)
Weighted-average number of shares outstanding:
Weighted-average number of basic shares outstanding (in shares)	4,368	4,322	4,358		4,139

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