Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Reconciliation of Net Income (Loss) (Details)

v3.8.0.1
Earnings per Share - Reconciliation of Net Income (Loss) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Numerator:    
Net income (loss) attributable to PQ Group Holdings Inc. $ 214 $ (2,454)
Denominator:    
Weighted average shares outstanding – Basic (shares) 133,154,144 103,947,888
Weighted average shares outstanding – Diluted (shares) 133,884,983 103,947,888
Net income (loss) per share:    
Basic income (loss) per share (usd per share) $ 0.00 $ (0.02)
Diluted income (loss) per share (usd per share) $ 0.00 $ (0.02)