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Restructuring Expenses (Tables)
 12 Months Ended
Dec. 31, 2019
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Activities and Related Reserves
Details of all restructuring activities and the related reserves for December 31, 2019, 2018 and 2017 were as follows:
Personnel
expenses		Demolition and
Removal costs		Ground
remediation
costs		OtherTotal
(In thousands) 
Provision at January 1, 2017$6,453  $4,880  $3,795  $1,547  $16,675  
Charges2,975  1,440  —  2,076  6,492  
Cost charged against liabilities (assets)—  (153) —  (114) (267) 
Cash paid(9,295) (3,849) —  (2,474) (15,618) 
Foreign currency translation adjustment513  505  522  (105) 1,435  
Provision at December 31, 2017646  2,824  4,317  930  8,717  
Charges7,586  1,978  2,919  3,137  15,620  
Cost charged against liabilities (assets)(324) (14) (833) (8) (1,180) 
Cash paid(5,825) (2,182) (3,259) (3,202) (14,468) 
Foreign currency translation adjustment252  (64) (206) (13) (32) 
Provision at December 31, 20182,334  2,541  2,939  844  8,658  
Charges2,801  9  268  2  3,080  
Cost charged against liabilities (assets)—  —  —  —  —  
Cash paid(1,727) (1,953) (2,610) (508) (6,798) 
Foreign currency translation adjustment(9) (36) (109) (20) (175) 
Provision at December 31, 2019$3,400  $561  $488  $317  $4,765