Annual report pursuant to Section 13 and 15(d)

Business Combination - Narratives (Details)

v3.10.0.1
Business Combination - Narratives (Details) - USD ($)
$ in Thousands
 3 Months Ended 8 Months Ended 12 Months Ended
May 04, 2016
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition                          
Net income (loss)   $ 28,470 $ 14,436 $ 16,159 $ 556 $ 65,564 $ (3,016) $ (1,670) $ (2,315)   $ 59,621 $ 58,563 $ (79,158)
Debt Repayment Penalty                          
Business Acquisition                          
Net income (loss)                         (26,250)
Refinancing Charges                          
Business Acquisition                          
Net income (loss)                         (4,747)
Transaction Fees                          
Business Acquisition                          
Net income (loss)                         (1,795)
PQ Holdings, Eco Services                          
Business Acquisition                          
Payments to acquire business $ 1,777,740                        
Equity consideration for the business combination 910,800                   $ 0 0 910,800
Stock awards transferred as consideration 1,400                        
Acquisition costs                         1,583
Increase to inventory at acquisition $ 58,683                        
Cost of goods sold, additional portion related to step-up inventory price                       $ 871 $ 29,086
Sales attributable to acquiree                   $ 690,459      
Net income (loss) from acquiree                   $ 17,991