Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Earnings per Share - Reconciliation of Net Income (Loss) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator:        
Net income (loss) attributable to PQ Group Holdings Inc. $ 14,185 $ (3,345) $ 30,181 $ (7,408)
Denominator:        
Weighted average shares outstanding – Basic (shares) 133,336,352 104,096,837 133,237,653 104,020,180
Weighted average shares outstanding – Diluted (shares) 134,576,162 104,096,837 134,223,628 104,020,180
Net income (loss) per share:        
Basic income (loss) per share (usd per share) $ 0.11 $ (0.03) $ 0.23 $ (0.07)
Diluted income (loss) per share (usd per share) $ 0.11 $ (0.03) $ 0.22 $ (0.07)