Annual report pursuant to Section 13 and 15(d)

Business Combination - Proforma Disclosure (Details)

v3.8.0.1
Business Combination - Proforma Disclosure (Details) - PQ Holdings, Eco Services - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition    
Pro forma sales $ 1,403,041 $ 1,413,201
Pro forma net loss $ (76,994) $ (120,982)