CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue:
Total revenue		$ 2,026,598	$ 2,078,925	$ 2,482,883
Costs and expenses:
Selling, general and administrative		717,894	781,609	785,545
Research and development		31,957	29,486	35,464
Restructuring charges		76,915	52,412	17,208
Goodwill impairment		0	123,574	0
Interest expense, net		110,094	98,769	87,306
Other components of net pension and postretirement cost		89,044	(8,256)	4,308
Other expense (income)		88,723	(3,064)	(17,071)
Total costs and expenses		2,078,925	2,122,845	2,294,231
(Loss) income from continuing operations before income taxes		(52,327)	(43,920)	188,652
(Benefit) provision for income taxes		(154,829)	17,347	42,956
Income (loss) from continuing operations		102,502	(61,267)	145,696
Loss from discontinued operations, net of tax		(306,099)	(324,360)	(108,756)
Net (loss) income		$ (203,597)	$ (385,627)	$ 36,940
Basic earnings (loss) per share attributable to common stockholders
Continuing operations (in dollars per share)	[1]	$ 0.57	$ (0.35)	$ 0.84
Discontinued operations (in dollars per share)	[1]	(1.71)	(1.85)	(0.63)
Net (loss) income (in dollars per share)	[1]	(1.13)	(2.20)	0.21
Diluted earnings (loss) per share attributable to common stockholders
Continuing operations (in dollars per share)	[1]	0.56	(0.35)	0.82
Discontinued operations (in dollars per share)	[1]	(1.68)	(1.85)	(0.61)
Net (loss) income (in dollars per share)	[1]	$ (1.12)	$ (2.20)	$ 0.21
Business services
Revenue:
Total revenue		$ 886,041	$ 857,646	$ 1,194,782
Costs and expenses:
Cost of revenue		515,533	560,640	858,127
Support services
Revenue:
Total revenue		374,571	410,734	438,191
Costs and expenses:
Cost of revenue		123,506	137,676	148,829
Financing
Revenue:
Total revenue		269,893	271,197	274,508
Costs and expenses:
Financing interest expense		63,600	63,281	51,789
Equipment sales
Revenue:
Total revenue		287,600	323,739	354,960
Costs and expenses:
Cost of revenue		203,613	223,757	253,843
Supplies
Revenue:
Total revenue		143,245	147,709	154,186
Costs and expenses:
Cost of revenue		40,585	43,347	43,778
Rentals
Revenue:
Total revenue		65,248	67,900	66,256
Costs and expenses:
Cost of revenue		$ 17,461	$ 19,614	$ 25,105

[1] The sum of the earnings per share amounts may not equal the totals due to rounding.