Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments - Equity Method Investment Reconciliation (Details)

v3.19.2
Equity Method Investments - Equity Method Investment Reconciliation (Details)
$ in Thousands, R$ in Millions, $ in Millions
3 Months Ended
Jul. 26, 2016
USD ($)
Jul. 26, 2016
BRL (R$)
May 02, 2016
installment
suit
Dec. 09, 2015
USD ($)
Dec. 09, 2015
TWD ($)
Sep. 02, 2015
installment
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2019
USD ($)
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]                  
Equity method investments             $ 14,238   $ 12,925
Indemnification Agreement [Member] | Equity Method Investments [Member] | NEC TOKIN Corporation [Member]                  
Related Party Transactions [Abstract]                  
Litigation Settlement, Number of Payment Installments | installment     5            
Settled Litigation [Member] | Indemnification Agreement [Member] | Equity Method Investments [Member]                  
Related Party Transactions [Abstract]                  
Litigation Settlement, Payment Period           5 years      
Litigation Settlement, Number of Payment Installments | installment           6      
Preliminary Settlement [Member] | Indemnification Agreement [Member] | Equity Method Investments [Member] | NEC TOKIN Corporation [Member]                  
Related Party Transactions [Abstract]                  
Loss Contingency, Pending Claims, Number | suit     2            
TAIWAN, PROVINCE OF CHINA                  
Related Party Transactions [Abstract]                  
Loss Contingency, Damages Sought, Value       $ 39,200 $ 1,200.0        
TAIWAN, PROVINCE OF CHINA | Minimum [Member]                  
Related Party Transactions [Abstract]                  
Loss Contingency, Damages Sought, Value       $ 19,600 $ 609.1        
BRAZIL | Settled Litigation [Member]                  
Related Party Transactions [Abstract]                  
Loss Contingency, Damages Paid, Value $ 200 R$ 0.6              
NT Sales Co., Ltd (NTS) [Member]                  
Related Party Transactions [Abstract]                  
Sales to NEC TOKIN             11,537 $ 12,208  
NEC TOKIN's sales to KEMET             $ 307 $ 388