Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Schedule of Earnings Per Share

Amounts attributable to MSA Safety Incorporated common shareholders:	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands, except per share amounts)	2021		2020		2021		2020
Net income	$	18,823	$	28,034	$	80,362	$	107,763
Preferred stock dividends	(10)		(10)		(30)		(30)
Net income available to common equity	18,813		28,024		80,332		107,733
Dividends and undistributed earnings allocated to participating securities	(3)		(12)		(25)		(79)
Net income available to common shareholders	18,810		28,012		80,307		107,654
Basic weighted-average shares outstanding	39,194		38,906		39,152		38,853
Stock-based compensation awards	236		354		272		416
Diluted weighted-average shares outstanding	39,430		39,260		39,424		39,269
Antidilutive stock options	—		—		—		—
Earnings per share:
Basic	$	0.48	$	0.72	$	2.05	$	2.77
Diluted	$	0.48	$	0.71	$	2.04	$	2.74