CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues from continuing operations:
Total revenues	$ 486,914	$ 470,385	$ 1,420,763	$ 1,386,324
Costs and expenses from continuing operations:
Selling, general and administrative expenses	64,146	70,629	201,234	213,048
Research and development expenses	193	331	545	811
Goodwill impairment charge	0	0	104,580	0
Other (income) expenses, net	(351)	(2,835)	515	(7,993)
Total costs and expenses	456,791	443,464	1,479,895	1,314,020
Operating income (loss) from continuing operations	30,123	26,921	(59,132)	72,304
Interest income	952	544	2,289	1,668
Interest expense	(19,751)	(15,741)	(51,535)	(47,640)
Facility fees and debt-related income (expense)	(2,511)	(198)	(894)	(5,506)
Defined benefit pension income	2,118	3,887	6,775	11,777
Income (loss) from continuing operations before income taxes and equity income	10,931	15,413	(102,497)	32,603
Income tax benefit (expense) from continuing operations	(9,376)	(7,816)	(7,482)	(14,714)
Equity income (loss) of unconsolidated entities, net	(128)	(293)	(373)	(488)
Income (loss) from continuing operations	1,427	7,304	(110,352)	17,401
Discontinued operations:
Income (loss) from discontinued businesses	1,993	1,301	(35,225)	12,904
Income tax benefit (expense) from discontinued businesses	(539)	1,223	5,282	(3,832)
Income (loss) from discontinued operations, net of tax	1,454	2,524	(29,943)	9,072
Net income (loss)	2,881	9,828	(140,295)	26,473
Less: Net (income) loss attributable to noncontrolling interests	(802)	(2,264)	(3,056)	(5,386)
Net income (loss) attributable to Harsco Corporation	2,079	7,564	(143,351)	21,087
Amounts attributable to Harsco Corporation common stockholders:
Income (loss) from continuing operations, net of tax	625	5,040	(113,408)	12,015
Income (loss) from discontinued operations, net of tax	1,454	2,524	(29,943)	9,072
Net income (loss) attributable to Harsco Corporation	$ 2,079	$ 7,564	$ (143,351)	$ 21,087
Weighted-average shares of common stock outstanding (in shares)	79,531	79,287	79,469	79,214
Basic earnings (loss) per common share attributable to Harsco Corporation common stockholders:
Continuing operations (in dollars per share)	$ 0.01	$ 0.06	$ (1.43)	$ 0.15
Discontinued operations (in dollars per share)	0.02	0.03	(0.38)	0.11
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ 0.03	$ 0.10	$ (1.80)	$ 0.27
Diluted weighted-average shares of common stock outstanding (in shares)	79,567	80,275	79,469	80,356
Diluted earnings (loss) per common share attributable to Harsco Corporation common stockholders:
Continuing operations (in dollars per share)	$ 0.01	$ 0.06	$ (1.43)	$ 0.15
Discontinued operations (in dollars per share)	0.02	0.03	(0.38)	0.11
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ 0.03	$ 0.09	$ (1.80)	$ 0.26
Service Revenues
Revenues from continuing operations:
Total revenues	$ 442,775	$ 430,824	$ 1,300,828	$ 1,274,814
Costs and expenses from continuing operations:
Cost of services and products sold	357,194	344,050	1,072,545	1,018,885
Product Revenues
Revenues from continuing operations:
Total revenues	44,139	39,561	119,935	111,510
Costs and expenses from continuing operations:
Cost of services and products sold	$ 35,609	$ 31,289	$ 100,476	$ 89,269