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Restructuring and Asset Impairment - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
positions
facility
Dec. 31, 2018
USD ($)
facility
position
Restructuring Cost and Reserve [Line Items]    
Expected future charges associated with previous restructuring on earnings $ 5,100  
Number of facilities closed (facility) | facility   5
Net book value of fixed assets sold $ 1,224,143 $ 1,233,821 [1],[2]
2019 Actions    
Restructuring Cost and Reserve [Line Items]    
Number of eliminated positions (position) | positions 90  
Asset impairment/disposal of assets $ 6,389  
Proceeds from the sale of fixed assets and inventory 3,377  
2019 Actions | Other Costs    
Restructuring Cost and Reserve [Line Items]    
Asset impairment/disposal of assets 599  
Proceeds from the sale of fixed assets and inventory $ 212  
2018 Actions    
Restructuring Cost and Reserve [Line Items]    
Number of facilities closed (facility) | facility 5  
Number of eliminated positions (position) | position   120
Asset impairment/disposal of assets $ 4,046  
Proceeds from the sale of fixed assets and inventory $ 3,516  
2018 Actions | Alabama    
Restructuring Cost and Reserve [Line Items]    
Number of facilities closed (facility) | facility 1  
2018 Actions | Canada    
Restructuring Cost and Reserve [Line Items]    
Number of facilities closed (facility) | facility   1
2018 Actions | Indonesia    
Restructuring Cost and Reserve [Line Items]    
Number of facilities closed (facility) | facility   1
2018 Actions | Russia    
Restructuring Cost and Reserve [Line Items]    
Number of facilities closed (facility) | facility   1
2018 Actions | Norway    
Restructuring Cost and Reserve [Line Items]    
Number of facilities closed (facility) | facility   1
2018 Actions | Sale of Fixed Assets and Inventory | Indonesia    
Restructuring Cost and Reserve [Line Items]    
Asset impairment/disposal of assets   $ 232
Proceeds from the sale of fixed assets and inventory   416
Net book value of fixed assets sold   648
Asset write off   909
2018 Actions | Other Costs    
Restructuring Cost and Reserve [Line Items]    
Asset impairment/disposal of assets $ 1,915  
Proceeds from the sale of fixed assets and inventory 1,977  
2017 and earlier Actions    
Restructuring Cost and Reserve [Line Items]    
Expected future charges associated with previous restructuring on earnings (100)  
Restructuring reserve $ 1,653 $ 4,199
[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.
[2] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.