CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Total revenue		$ 3,266,348	$ 3,538,042	$ 3,673,561
Costs and expenses:
Selling, general and administrative		897,260	905,570	924,163
Research and development		41,405	43,657	46,777
Restructuring charges		61,585	18,715	19,003
Goodwill impairment		339,184	0	0
Interest expense, net		100,445	89,980	96,886
Other components of net pension and postretirement (income) cost		(8,256)	4,308	1,010
Other (income) expense		(3,064)	(21,618)	41,574
Total costs and expenses		3,672,850	3,498,162	3,680,976
(Loss) income from continuing operations before income taxes		(406,502)	39,880	(7,415)
(Benefit) provision for income taxes		(20,875)	2,940	(10,922)
(Loss) income from continuing operations		(385,627)	36,940	3,507
Loss from discontinued operations, net of tax		0	0	(4,858)
Net (loss) income		$ (385,627)	$ 36,940	$ (1,351)
Basic (loss) earnings per share attributable to common stockholders
Continuing operations (in dollars per share)	[1]	$ (2.20)	$ 0.21	$ 0.02
Discontinued operations (in dollars per share)	[1]	0	0	(0.03)
Net (loss) income (in dollars per share)	[1]	(2.20)	0.21	(0.01)
Diluted (loss) earnings per share attributable to common stockholders
Continuing operations (in dollars per share)	[1]	(2.20)	0.21	0.02
Discontinued operations (in dollars per share)	[1]	0	0	(0.03)
Net (loss) income (in dollars per share)	[1]	$ (2.20)	$ 0.21	$ (0.01)
Business services
Revenue:
Total revenue		$ 2,045,069	$ 2,249,941	$ 2,334,674
Costs and expenses:
Cost of products and sales		1,756,616	1,934,206	2,034,477
Support services
Revenue:
Total revenue		410,734	438,191	460,888
Costs and expenses:
Cost of products and sales		137,676	148,829	149,706
Financing
Revenue:
Total revenue		271,197	274,508	294,418
Costs and expenses:
Cost of products and sales		63,281	51,789	47,059
Equipment sales
Revenue:
Total revenue		323,739	354,960	350,138
Costs and expenses:
Cost of equipment sales		223,757	253,843	251,914
Supplies
Revenue:
Total revenue		147,709	154,186	159,438
Costs and expenses:
Cost of products and sales		43,347	43,778	43,980
Rentals
Revenue:
Total revenue		67,900	66,256	74,005
Costs and expenses:
Cost of products and sales		$ 19,614	$ 25,105	$ 24,427

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