XML 61 R51.htm IDEA: XBRL DOCUMENT v3.21.1
Comprehensive Income (Loss) - Accumulated other comprehensive loss (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Comprehensive Income (Loss)    
Foreign currency translation adjustments $ (6,193) $ (6,050)
Pension liability, net of tax (21,772) (21,955)
Total accumulated other comprehensive loss $ (27,965) $ (28,005)