Annual report pursuant to Section 13 and 15(d)

Restructuring Activity Restructuring Activity (Details 1)

v3.20.4
Restructuring Activity Restructuring Activity (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 3,833 $ 2,636 $ 3,838
One-time Termination Benefits [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 1,620 1,150 2,094
Facility Closing [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 1,998 1,301 1,608
Other Restructuring [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 215 $ 185 $ 136