CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue:
Total revenue		$ 1,892,629	$ 2,026,598	$ 2,078,925
Costs and expenses:
Selling, general and administrative		621,567	717,894	781,609
Research and development		15,278	31,957	29,486
Restructuring charges		58,660	76,915	52,412
Goodwill impairment		0	0	123,574
Interest expense		101,460	110,094	98,769
Other components of net pension and postretirement cost		7,543	89,044	(8,256)
Other expense (income)		26,830	88,723	(3,064)
Total costs and expenses		1,700,105	2,078,925	2,122,845
Income (loss) from continuing operations before income taxes		192,524	(52,327)	(43,920)
Provision (benefit) for income taxes		47,827	(154,829)	17,347
Income (loss) from continuing operations		144,697	102,502	(61,267)
Loss from discontinued operations, net of tax		0	(306,099)	(324,360)
Net income (loss)		$ 144,697	$ (203,597)	$ (385,627)
Basic earnings (loss) per share attributable to common stockholders
Continuing operations (in dollars per share)	[1]	$ 0.84	$ 0.57	$ (0.35)
Discontinued operations (in dollars per share)	[1]	0	(1.71)	(1.85)
Net income (loss) - Basic (in dollars per share)	[1]	0.84	(1.13)	(2.20)
Diluted earnings (loss) per share attributable to common stockholders
Continuing operations (in dollars per share)	[1]	0.84	0.56	(0.35)
Discontinued operations (in dollars per share)	[1]	0	(1.68)	(1.85)
Net income (loss) - Diluted (in dollars per share)	[1]	$ 0.84	$ (1.12)	$ (2.20)
Services
Revenue:
Total revenue		$ 1,206,031	$ 1,260,612	$ 1,268,380
Costs and expenses:
Cost of revenue		594,898	639,039	698,316
Products
Revenue:
Total revenue		364,709	430,845	471,448
Costs and expenses:
Cost of revenue		212,366	244,198	267,104
Financing and other
Revenue:
Total revenue		321,889	335,141	339,097
Costs and expenses:
Cost of financing and other		$ 61,503	$ 81,061	$ 82,895

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