Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue		$ 899,203	$ 837,492	$ 1,814,400	$ 1,633,760
Costs and expenses:
Selling, general and administrative		236,190	233,631	474,292	482,264
Research and development		11,059	7,467	22,375	19,583
Restructuring charges		4,844	4,922	7,733	8,739
Goodwill impairment		0	0	0	198,169
Interest expense, net		24,346	26,446	49,504	52,329
Other components of net pension and postretirement cost		312	386	662	235
Other (income) expense		(13,646)	(17,375)	37,748	16,112
Total costs and expenses		873,412	820,773	1,830,256	1,845,618
Income (loss) from continuing operations before taxes		25,791	16,719	(15,856)	(211,858)
Provision (benefit) for income taxes		4,915	17,016	(9,077)	6,986
Income (loss) from continuing operations		20,876	(297)	(6,779)	(218,844)
(Loss) income from discontinued operations, net of tax		(1,020)	(3,032)	(4,906)	7,032
Net income (loss)		$ 19,856	$ (3,329)	$ (11,685)	$ (211,812)
Basic earnings (loss) per share:
Continuing operations (in dollars per share)	[1]	$ 0.12	$ 0	$ (0.04)	$ (1.28)
Discontinued operations (in dollars per share)	[1]	(0.01)	(0.02)	(0.03)	0.04
Net (loss) income (in dollars per share)	[1]	0.11	(0.02)	(0.07)	(1.24)
Diluted earnings (loss) per share:
Continuing operations (in dollars per share)	[1]	0.12	0	(0.04)	(1.28)
Discontinued operations (in dollars per share)	[1]	(0.01)	(0.02)	(0.03)	0.04
Net (loss) income (in dollars per share)	[1]	$ 0.11	$ (0.02)	$ (0.07)	$ (1.24)
Business services
Revenue from contracts with customers		$ 567,022	$ 528,990	$ 1,137,476	$ 973,369
Revenue		567,022	528,990	1,137,476	973,369
Costs and expenses:
Cost of products and sales		482,814	454,311	982,348	828,976
Support services
Revenue from contracts with customers		115,156	113,786	233,853	235,801
Revenue		115,156	113,786	233,853	235,801
Costs and expenses:
Cost of products and sales		37,679	36,725	74,396	76,485
Financing
Revenue from contracts with customers		0	0	0	0
Revenue		73,453	85,462	151,265	174,540
Costs and expenses:
Cost of products and sales		11,773	11,939	23,659	24,428
Equipment sales
Revenue from contracts with customers		22,394	14,492	41,511	31,621
Revenue		86,267	57,837	173,070	134,110
Costs and expenses:
Cost of equipment sales		61,561	47,920	123,401	105,279
Supplies
Revenue from contracts with customers		38,655	32,773	80,879	78,482
Revenue		38,655	32,773	80,879	78,482
Costs and expenses:
Cost of products and sales		10,467	8,379	21,678	20,619
Rentals
Revenue from contracts with customers		0	0	0	0
Revenue		18,650	18,644	37,857	37,458
Costs and expenses:
Cost of products and sales		$ 6,013	$ 6,022	$ 12,460	$ 12,400

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