CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues from continuing operations:
Product revenues	$ 1,848,399	$ 1,534,033	$ 1,204,369
Costs and expenses from continuing operations:
Selling, general and administrative costs	272,233	284,442	205,177
Research and development expenses	956	534	886
Other expenses	(3,722)	10,072	(8,194)
Total costs and expenses	1,760,023	1,537,339	1,127,966
Operating income (loss) from continuing operations	88,376	(3,306)	76,403
Interest income	2,231	2,129	1,946
Interest expense	(63,235)	(58,196)	(34,024)
Defined benefit pension income (expense)	15,640	7,073	(5,556)
Loss on early extinguishment of debt	(5,506)	(1,920)	(7,704)
Income (loss) from continuing operations before income taxes and equity income	37,506	(54,220)	31,065
Income tax expense	(9,089)	8,673	(12,728)
Equity in income (loss) of unconsolidated entities, net	(302)	186	273
Income (loss) from continuing operations	28,115	(45,361)	18,610
Discontinued operations:
Income (loss) from discontinued businesses	0	18,281	569,135
Income (loss) from discontinued businesses	(25,863)	20,350	52,937
Income tax benefit (expense) from discontinued businesses	477	(15,245)	(128,464)
Income (loss) from discontinued operations, net of tax	(25,386)	23,386	493,608
Net income (loss)	2,729	(21,975)	512,218
Less: Net income attributable to noncontrolling interests	(5,978)	(4,366)	(8,299)
Net income (loss) attributable to Harsco Corporation	(3,249)	(26,341)	503,919
Amounts attributable to Harsco Corporation common stockholders:
Income (loss) from continuing operations, net of tax	22,137	(49,727)	10,311
Income (loss) from discontinued operations, net of tax	(25,386)	23,386	493,608
Net income (loss) attributable to Harsco Corporation common stockholders	$ (3,249)	$ (26,341)	$ 503,919
Weighted average shares of common stock outstanding	79,234	78,939	79,632
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders:
Continuing operations (in dollars per share)	$ 0.28	$ (0.63)	$ 0.13
Discontinued operations (in dollars per share)	(0.32)	0.30	6.20
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.04)	$ (0.33)	$ 6.33
Diluted weighted average shares of stock outstanding	80,289	78,939	81,375
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders:
Continuing operations (in dollars per share)	$ 0.28	$ (0.63)	$ 0.13
Discontinued operations (in dollars per share)	(0.32)	0.30	6.07
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.04)	$ (0.33)	$ 6.19	[1]
Services
Revenues from continuing operations:
Product revenues	$ 1,700,896	$ 1,400,648	$ 1,058,373
Costs and expenses from continuing operations:
Cost of services and products sold	1,369,073	1,140,303	822,043
Product
Revenues from continuing operations:
Product revenues	147,503	133,385	145,996
Costs and expenses from continuing operations:
Cost of services and products sold	$ 121,483	$ 101,988	$ 108,054

[1] Does not total due to rounding.