CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues from continuing operations:
Service revenues	$ 254,962	$ 240,609
Product revenues	153,076	131,932
Total revenues	408,038	372,541
Costs and expenses from continuing operations:
Costs of services sold	199,373	189,482
Costs of products sold	111,980	98,790
Selling, general and administrative costs	57,083	53,937
Research and development expenses	1,239	831
Other expenses, net	1,822	894
Total costs and expenses	371,497	343,934
Operating income from continuing operations	36,541	28,607
Interest income	498	512
Interest expense	(9,583)	(11,653)
Defined benefit pension income (expense)	839	(699)
Income from continuing operations before income taxes	28,295	16,767
Income tax expense	(8,266)	(6,253)
Income from continuing operations	20,029	10,514
Discontinued operations:
Loss on disposal of discontinued business	(580)	(588)
Income tax benefit related to discontinued business	128	211
Loss from discontinued operations, net of tax	(452)	(377)
Net income	19,577	10,137
Less: Net income attributable to noncontrolling interests	(1,769)	(1,247)
Net income attributable to Harsco Corporation	17,808	8,890
Amounts attributable to Harsco Corporation common stockholders:
Income from continuing operations, net of tax	18,260	9,267
Loss from discontinued operations, net of tax	(452)	(377)
Net income attributable to Harsco Corporation	$ 17,808	$ 8,890
Weighted-average shares of common stock outstanding (in shares)	80,650	80,385
Basic earnings (loss) per common share attributable to Harsco Corporation common stockholders:
Continuing operations (in dollars per share)	$ 0.23	$ 0.12
Discontinued operations (in dollars per share)	(0.01)	0.00
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ 0.22	$ 0.11	[1]
Diluted weighted-average shares of common stock outstanding (in shares)	83,544	82,263
Diluted earnings (loss) per common share attributable to Harsco Corporation common stockholders:
Continuing operations (in dollars per share)	$ 0.22	$ 0.11
Discontinued operations (in dollars per share)	(0.01)	0.00
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ 0.21	$ 0.11

[1] Does not total due to rounding