Quarterly report pursuant to Section 13 or 15(d)

Restructuring and Other Related Costs - Components of Restructuring and Other Related Costs (Details)

v3.8.0.1
Restructuring and Other Related Costs - Components of Restructuring and Other Related Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Restructuring Cost and Reserve    
Restructuring and other related costs $ 120 $ 1,196
Minimum    
Restructuring Cost and Reserve    
Estimated remaining restructuring costs 500  
Maximum    
Restructuring Cost and Reserve    
Estimated remaining restructuring costs 1,000  
Other related costs    
Restructuring Cost and Reserve    
Restructuring and other related costs 13 366
Legacy Eco Restructuring Plan | Employee Severance, One-time Termination Benefits, And Other Employee Costs [Member]    
Restructuring Cost and Reserve    
Restructuring and other related costs 0 830
Legacy Eco Restructuring Plan | Employee Severance    
Restructuring Cost and Reserve    
Restructuring and other related costs 0 830
Performance Materials Plant Closure | Employee Severance, One-time Termination Benefits, And Other Employee Costs [Member]    
Restructuring Cost and Reserve    
Restructuring and other related costs $ 107 $ 0