Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

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:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share data)	2018		2017		2018		2017
Net income attributable to Apergy	$	25,263	$	18,421	$	71,989	$	50,444
Weighted-average number of shares outstanding		77,340		77,340		77,340		77,340
Dilutive effect of stock-based compensation		229		550		402		550
Total shares and dilutive securities		77,569		77,890		77,742		77,890
Basic earnings per share attributable to Apergy	$	0.33	$	0.24	$	0.93	$	0.65
Diluted earnings per share attributable to Apergy	$	0.33	$	0.24	$	0.93	$	0.65