Annual report pursuant to Section 13 and 15(d)

Restructuring - Rollforward (Details)

v3.20.1
Restructuring - Rollforward (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Reconciliation of restructuring liability      
Costs charged to expense (1) $ 8,882 $ 8,779 $ 14,843
Personnel reduction costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Accrual Adjustment     0
Reconciliation of restructuring liability      
Balance at the beginning of the period 1,865 9,629 999
Costs charged to expense (1) 7,618 2,823 12,587
Costs paid or settled (7,976) (10,329) (3,901)
Change in foreign exchange 3 (258) 147
Balance at the end of the period 1,510 1,865 9,629
Personnel reduction costs      
Reconciliation of restructuring liability      
Costs charged to expense (1)     12,384
Manufacturing and sales office relocation costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Accrual Adjustment     312
Reconciliation of restructuring liability      
Balance at the beginning of the period 316 330 406
Costs charged to expense (1) 1,264 5,956 2,256
Costs paid or settled (1,264) (5,957) (2,662)
Change in foreign exchange 7 (13) 18
Balance at the end of the period 323 316 330
Employee Relocation      
Reconciliation of restructuring liability      
Costs charged to expense (1)     200
Film and Electrolytic      
Reconciliation of restructuring liability      
Costs charged to expense (1) 3,458 2,717 $ 5,788
Film and Electrolytic | Personnel reduction costs      
Reconciliation of restructuring liability      
Costs charged to expense (1) $ 500 $ 300