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Equity Method Investments - Equity Method Investment Reconciliation (Details)
$ in Thousands, $ in Millions
Jul. 26, 2016
USD ($)
May 02, 2016
suit
installment
Dec. 09, 2015
USD ($)
Dec. 09, 2015
TWD ($)
Sep. 02, 2015
installment
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
May 05, 2010
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]                
Equity Method Investments           $ 11,212 $ 12,016  
NEC TOKIN Corporation [Member]                
Related Party Transactions [Abstract]                
Loss Contingency Accrual           $ 48,200    
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 | Taiwan, New Dollars                
Related Party Transactions [Abstract]                
Loss Contingency, Damages Sought, Value       $ 1,218.2        
TAIWAN, PROVINCE OF CHINA | Taiwan, New Dollars | Minimum [Member]                
Related Party Transactions [Abstract]                
Loss Contingency, Damages Sought, Value       $ 609.1        
TAIWAN, PROVINCE OF CHINA | United States of America, Dollars                
Related Party Transactions [Abstract]                
Loss Contingency, Damages Sought, Value     $ 39,900          
TAIWAN, PROVINCE OF CHINA | United States of America, Dollars | Minimum [Member]                
Related Party Transactions [Abstract]                
Loss Contingency, Damages Sought, Value     $ 20,000          
BRAZIL | United States of America, Dollars | Settled Litigation [Member]                
Related Party Transactions [Abstract]                
Loss Contingency, Damages Paid, Value $ 200              
Senior Notes [Member]                
Schedule of Equity Method Investments [Line Items]                
Rate               10.50%