Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

A reconciliation of the number of shares used for the basic and diluted earnings per share calculation was as follows:

	Years Ended December 31,
(in thousands, except per share data)	2019		2018		2017
Net income attributable to Apergy	$	52,164	$	92,737	$	109,589
Weighted-average number of shares outstanding	77,427		77,342		77,340
Dilutive effect of stock-based compensation	197		350		550
Total shares and dilutive securities	77,624		77,692		77,890
Basic earnings per share attributable to Apergy	$	0.67	$	1.20	$	1.42
Diluted earnings per share attributable to Apergy	$	0.67	$	1.19	$	1.41