Reconciliation of Basic and Diluted Shares (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Reconciliation of basic and diluted shares

	Three Months Ended
	March 31
(In thousands, except per share amounts)	2019		2018
Income from continuing operations attributable to Harsco Corporation common stockholders	$	21,029	$	18,260
Weighted-average shares outstanding - basic	79,907		80,650
Dilutive effect of stock-based compensation	1,746		2,894
Weighted-average shares outstanding - diluted	81,653		83,544
Earnings from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	0.26	$	0.23
Diluted	$	0.26	$	0.22

Schedule of antidilutive securities excluded from computation of earnings per share

The following average outstanding stock-based compensation units were not included in the computation of diluted earnings per share because the effect was antidilutive:

	Three Months Ended
	March 31
(In thousands)	2019	2018
Stock appreciation rights	608	696
Performance share units	233	—