CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenues	$ 144,054	$ 151,414	$ 299,860	$ 292,288
Costs and expenses:
Cost of operations	100,812	118,337	226,052	229,055
Selling, general and administrative expenses	34,008	36,635	63,025	65,150
Research and development costs	941	890	1,298	1,542
Impairment of long-lived assets	0	0	950	0
Loss on asset disposals, net	165	0	173	0
Total costs and expenses	135,926	155,862	291,498	295,747
Operating income (loss)	8,128	(4,448)	8,362	(3,459)
Other (expense) income:
Interest expense	(10,992)	(11,967)	(22,034)	(23,980)
Interest income	537	160	777	307
Loss on debt extinguishment	0	(1,053)	0	(6,124)
Benefit plans, net	(776)	66	(1,555)	136
Foreign exchange	1,237	1,395	862	1,005
Other expense, net	(294)	(22)	(625)	(391)
Total other expense, net	(10,288)	(11,421)	(22,575)	(29,047)
Loss before income tax expense	(2,160)	(15,869)	(14,213)	(32,506)
Income tax expense	3,892	4,678	5,844	5,663
Loss from continuing operations	(6,052)	(20,547)	(20,057)	(38,169)
(Loss) income from discontinued operations, net of tax	(52,440)	45,953	(60,442)	46,742
Net (loss) income attributable to stockholders	(58,492)	25,406	(80,499)	8,573
Less: Dividend on Series A preferred stock	3,715	3,715	7,430	7,429
Net (loss) income attributable to stockholders of common stock, basic	(62,207)	21,691	(87,929)	1,144
Net (loss) income attributable to stockholders of common stock, diluted	$ (62,207)	$ 21,691	$ (87,929)	$ 1,144
Basic (loss) earnings per share:
Continuing operations (in dollars per share)	$ (0.10)	$ (0.26)	$ (0.28)	$ (0.51)
Discontinued operations (in dollars per share)	(0.53)	0.50	(0.61)	0.52
Basic (loss) earnings per share (in dollars per share)	(0.63)	0.24	(0.89)	0.01
Diluted (loss) earnings per share:
Continuing operations (in dollars per share)	(0.10)	(0.26)	(0.28)	(0.51)
Discontinued operations (in dollars per share)	(0.53)	0.50	(0.61)	0.52
Diluted (loss) earnings per share (in dollars per share)	$ (0.63)	$ 0.24	$ (0.89)	$ 0.01
Shares used in the computation of basic (loss) earnings loss per share (in shares)	98,719	91,049	98,327	90,264
Shares used in the computation of diluted (loss) earnings per share (in shares)	98,719	91,152	98,327	90,324