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Equity Method Investment, Indemnity Asset

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Equity Method Investment, Purchase Price Adjustment, Fixed Assets

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Equity Method Investment, Purchase Price Adjustment, Long-Term Debt

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Equity Method Investment, Purchase Price Adjustment, Technology

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Equity Method Investment, Other Asset Adjustment

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Equity Method investment, Purchase Price Adjustment, Inventory Profit Elimination

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Litigation Settlement, Number of Annual Payment Installments

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Number of payments to satisfy the fine

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Litigation Settlement, Payment Period

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Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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For indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the indemnification benefit which may be realized.

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The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

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Amount of loss contingency liability.

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Amount of damages paid to the plaintiff in the legal matter.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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Number of pending claims pertaining to a loss contingency.

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Investment in NEC TOKIN - Equity Method Investment Reconciliation (Details) BRL in Thousands, $ in Thousands, ¥ in Millions, TWD in Millions									3 Months Ended		9 Months Ended
	Jul. 26, 2016 USD ($)	Jul. 26, 2016 BRL	May 02, 2016 USD ($) suit installment	Mar. 29, 2016 USD ($)	Mar. 29, 2016 JPY (¥)	Dec. 09, 2015 USD ($)	Dec. 09, 2015 TWD	Sep. 02, 2015 USD ($) installment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]
Investment in NEC TOKIN									$ 21,202		$ 21,202		$ 20,334
NEC TOKIN Corporation [Member]
Related Party Transactions [Abstract]
Loss Contingency Accrual									72,500		72,500
KEMET Electronics Corporation [Member]
Related Party Transactions [Abstract]
Business Combination, Indemnification Assets, Range of Outcomes, Value, Low									8,500		8,500
Stockholders Agreement [Member] \| KEMET Electronics Corporation [Member]
Related Party Transactions [Abstract]
Receivable balances									638		638		748
Equity Method Investments [Member] \| Stockholders Agreement [Member]
Related Party Transactions [Abstract]
Business Combination, Indemnification Assets, Range of Outcomes, Value, Low									25,000		25,000
Indemnification Agreement [Member] \| Equity Method Investments [Member]
Related Party Transactions [Abstract]
Litigation Settlement, Amount								$ (13,800)
Indemnification Agreement [Member] \| Equity Method Investments [Member] \| NEC TOKIN Corporation [Member]
Related Party Transactions [Abstract]
Litigation Settlement, Amount			$ (37,300)
Litigation Settlement, Number of Payment Installments \| installment			5
Litigation Settlement, Number of Annual Payment Installments \| installment			3
Settled Litigation [Member] \| Indemnification Agreement [Member] \| Equity Method Investments [Member]
Related Party Transactions [Abstract]
Litigation Settlement, Amount								$ (2,300)
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 \| TWD							TWD 1,218.2
TAIWAN, PROVINCE OF CHINA \| Taiwan, New Dollars \| Minimum
Related Party Transactions [Abstract]
Loss Contingency, Damages Sought, Value \| TWD							TWD 609.1
TAIWAN, PROVINCE OF CHINA \| United States of America, Dollars
Related Party Transactions [Abstract]
Loss Contingency, Damages Sought, Value						$ 37,700
TAIWAN, PROVINCE OF CHINA \| United States of America, Dollars \| Minimum
Related Party Transactions [Abstract]
Loss Contingency, Damages Sought, Value						$ 18,900
JAPAN \| United States of America, Dollars
Related Party Transactions [Abstract]
Litigation Settlement, Amount				$ (1,100)
JAPAN \| Japan, Yen
Related Party Transactions [Abstract]
Litigation Settlement, Amount \| ¥					¥ (127.2)
BRAZIL \| Settled Litigation [Member]
Related Party Transactions [Abstract]
Loss Contingency, Damages Paid, Value	$ 200	BRL 601
NEC TOKIN Corporation [Member]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]
Investment in NEC TOKIN									21,202		21,202		20,334
Property, plant and equipment (1)									3,014		3,014		3,365
Technology (1)									(8,657)		(8,657)		(10,134)
Long-term debt (1)									(1,238)		(1,238)		(1,975)
Goodwill									(7,250)		(7,250)		(7,555)
Indemnity asset for legal investigation									(8,500)		(8,500)		(8,500)
Inventory profit elimination (2)									265		265		371
Other									(553)		(553)		(604)
KEC’s 34% economic interest in NEC TOKIN’s net assets									(1,717)		(1,717)		(4,698)
Related Party Transactions [Abstract]
Sales to NEC TOKIN									4,814	$ 5,020	13,096	$ 14,350
NEC TOKIN's sales to KEMET									2,350	$ 1,157	6,112	$ 4,747
Accounts receivable									2,989		2,989		5,220
Accounts payable									$ 907		$ 907		$ 1,019
KEC’s economic interest %									34.00%	34.00%	34.00%	34.00%