Earnings per share (Tables)

9 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of earnings per share, basic and diluted

The following table sets forth the computation of basic and diluted income (loss) from continuing operations per common share (in thousands, except per share amounts):

	Three Months Ended June 30,				Nine Months Ended June 30,
	2017		2018		2017			2018
Numerator:
Numerator for basic and diluted income (loss) per common share—Net income (loss) attributable to Evoqua Water Technologies Corp.	$	1,503	$	793	$	(8,898	)	$	9,585
Denominator:
Denominator for basic net income (loss) per common share—weighted average shares	104,821		113,842		104,821			113,842
Effect of dilutive securities:
Share‑based compensation	3,164		5,205		—			6,094
Denominator for diluted net income (loss) per common share—adjusted weighted average shares	107,985		119,047		104,821			119,936
Basic income (loss) attributable to Evoqua Water Technologies Corp. per common share	$	0.01	$	0.01	$	(0.08	)	$	0.08
Diluted income (loss) attributable to Evoqua Water Technologies Corp. per common share	$	0.01	$	0.01	$	(0.08	)	$	0.08