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Supplemental Financial Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2017
Sep. 30, 2018
Sep. 30, 2017
Long Lived Assets Held-for-sale [Line Items]          
Gain from antitrust litigation settlement $ 0     $ (3,591)  
Loss (gain) on sale of long-lived assets 222 $ (4,387)   (161) $ (5,329)
Lease income 237 0   237 0
Depreciation on leased assets 878 0   878 0
Other operating (income) expense, net 863 (4,387)   $ (3,111) $ (5,329)
Arizona          
Long Lived Assets Held-for-sale [Line Items]          
Loss (gain) on sale of long-lived assets $ (400)        
Belgium          
Long Lived Assets Held-for-sale [Line Items]          
Loss (gain) on sale of long-lived assets   $ (4,400) $ (900)