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Concentrations of Risks (Details)
$ in Thousands, ¥ in Millions, TWD in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 26, 2016
USD ($)
May 02, 2016
USD ($)
suit
installment
Mar. 29, 2016
USD ($)
Mar. 29, 2016
JPY (¥)
Dec. 09, 2015
USD ($)
Dec. 09, 2015
TWD
Sep. 02, 2015
USD ($)
installment
Dec. 31, 2017
USD ($)
Dec. 31, 2016
Dec. 31, 2017
USD ($)
Dec. 31, 2016
Mar. 31, 2016
Jan. 18, 2018
USD ($)
Apr. 19, 2017
USD ($)
Mar. 31, 2017
USD ($)
Concentration of Risk                              
Estimated Litigation Liability               $ 2,000   $ 2,000          
Equity Method Investment, Indemnity Asset                           $ 8,500  
Accounts Payable, Trade, Current               133,314   133,314         $ 69,674
Accrued expenses               108,360   108,360         57,752
Other non-current obligations               $ 152,718   $ 152,718         $ 60,131
Net revenue | Sales risk                              
Concentration of Risk                              
Concentration Risk, Customer               1 1 1 1        
Net revenue | Sales risk | Minimum [Member]                              
Concentration of Risk                              
Concentration risk, percentage               10.00% 10.00% 10.00% 10.00%        
Net revenue | Electronics distributor risk                              
Concentration of Risk                              
Concentration risk, percentage                   39.00% 46.00%        
Accounts receivable | Sales risk                              
Concentration of Risk                              
Concentration Risk, Customer               0 0 0          
Accounts receivable | Sales risk | Maximum                              
Concentration of Risk                              
Concentration risk, percentage                       10.00%      
Accounts receivable | Credit Concentration Risk [Member]                              
Concentration of Risk                              
Concentration Risk, Customer                     0        
Accounts receivable | Credit Concentration Risk [Member] | Maximum                              
Concentration of Risk                              
Concentration risk, percentage                   10.00%          
Indemnification Agreement [Member] | Equity Method Investments [Member]                              
Concentration of Risk                              
Litigation Settlement, Amount             $ (13,800)                
Settled Litigation [Member] | Indemnification Agreement [Member] | Equity Method Investments [Member]                              
Concentration of Risk                              
Litigation Settlement, Payment Period             5 years                
Litigation Settlement, Number of Payment Installments | installment             6                
Litigation Settlement, Amount             $ (2,300)                
Japan, Yen | JAPAN                              
Concentration of Risk                              
Litigation Settlement, Amount | ¥       ¥ (127.2)                      
Taiwan, New Dollars | TAIWAN, PROVINCE OF CHINA                              
Concentration of Risk                              
Loss Contingency, Damages Sought, Value | TWD           TWD 1,218.2                  
Taiwan, New Dollars | TAIWAN, PROVINCE OF CHINA | Minimum [Member]                              
Concentration of Risk                              
Loss Contingency, Damages Sought, Value | TWD           TWD 609.1                  
United States of America, Dollars | TAIWAN, PROVINCE OF CHINA                              
Concentration of Risk                              
Loss Contingency, Damages Sought, Value         $ 40,800                    
United States of America, Dollars | TAIWAN, PROVINCE OF CHINA | Minimum [Member]                              
Concentration of Risk                              
Loss Contingency, Damages Sought, Value         $ 20,400                    
United States of America, Dollars | JAPAN                              
Concentration of Risk                              
Litigation Settlement, Amount     $ (1,100)                        
United States of America, Dollars | BRAZIL | Settled Litigation [Member]                              
Concentration of Risk                              
Loss Contingency, Damages Paid, Value $ 200                            
Brazil, Brazil Real | BRAZIL | Settled Litigation [Member]                              
Concentration of Risk                              
Loss Contingency, Damages Paid, Value $ 600                            
NEC TOKIN Corporation [Member]                              
Concentration of Risk                              
Loss Contingency Accrual               $ 84,300   $ 84,300          
NEC TOKIN Corporation [Member] | Indemnification Agreement [Member] | Equity Method Investments [Member]                              
Concentration of Risk                              
Litigation Settlement, Number of Payment Installments | installment   5                          
Litigation Settlement, Amount   $ (37,300)                          
Litigation Settlement, Number of Annual Payment Installments | installment   2                          
NEC TOKIN Corporation [Member] | Preliminary Settlement [Member] | Indemnification Agreement [Member] | Equity Method Investments [Member]                              
Concentration of Risk                              
Loss Contingency, Pending Claims, Number | suit   2                          
Stockholders Agreement [Member] | Equity Method Investments [Member]                              
Concentration of Risk                              
Business Combination, Indemnification Assets, Range of Outcomes, Value, Low               $ 25,000   $ 25,000          
NEC TOKIN Corporation [Member]                              
Concentration of Risk                              
Equity Method Investment, Ownership Percentage               34.00% 34.00% 34.00% 34.00%        
Unfavorable Regulatory Action [Member]                              
Concentration of Risk                              
Accounts Payable, Trade, Current               $ 10,100   $ 10,100          
Accrued expenses               38,100   38,100          
Other non-current obligations               $ 36,100   $ 36,100          
Subsequent Event [Member]                              
Concentration of Risk                              
Estimated Litigation Liability                         $ 4,950