Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Reconciliation from Basic to Diluted Weighted Average Number of Shares Outstanding

The reconciliation from basic to diluted weighted average shares outstanding is as follows:

	Three months ended March 31,
	2020	2019
Weighted average shares outstanding – Basic	135,240,897	133,946,308
Dilutive effect of unvested common shares and restricted stock units with service conditions, performance stock units considered probable of vesting and assumed stock option exercises and conversions	845,185	948,046
Weighted average shares outstanding – Diluted	136,086,082	134,894,354

Schedule of Earnings Per Share, Basic and Diluted

Basic and diluted earnings per share are calculated as follows:

	Three months ended March 31,
	2020		2019
Numerator:
Net income attributable to PQ Group Holdings Inc.	$	224	$	3,151
Denominator:
Weighted average shares outstanding – Basic	135,240,897		133,946,308
Weighted average shares outstanding – Diluted	136,086,082		134,894,354
Net income per share:
Basic income per share	$	—	$	0.02
Diluted income per share	$	—	$	0.02

Schedule of Securities Excluded from Computation of Earnings Per Share

The table below presents the details of the Company’s weighted average equity-based awards outstanding during each respective period that were excluded from the calculation of diluted earnings per share:

	Three months ended March 31,
	2020	2019
Restricted stock awards with performance only targets not yet achieved	1,526,613	1,639,514
Stock options with performance only targets not yet achieved	516,000	586,253
Anti-dilutive restricted stock awards, restricted stock units and performance stock units	1,264,324	—
Anti-dilutive stock options	850,807	863,063