Kemet (KEM) 10-K 1 Jun 17 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2017	May 25, 2017	Sep. 30, 2016
Document and Entity Information
Entity Registrant Name	KEMET CORP
Entity Central Index Key	887,730
Document Type	10-K
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 160,510,185
Entity Common Stock, Shares Outstanding		47,505,958
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 109,774	$ 65,004
Accounts receivable, net	92,526	93,168
Inventories, net	147,955	168,879
Prepaid and other current assets	28,759	25,496
Total current assets	379,014	352,547
Property, plant and equipment, net	209,311	241,839
Goodwill	40,294	40,294
Intangible assets, net	29,781	33,301
Investment in NEC TOKIN	63,416	20,334
Deferred income taxes	8,593	8,397
Other assets	4,119	3,068
Total assets	734,528	699,780
Current liabilities:
Current portion of long-term debt	2,000	2,000
Accounts payable	69,674	70,981
Accrued expenses	57,752	50,320
Income taxes payable	715	453
Total current liabilities	130,141	123,754
Long-term debt	386,211	385,833
Other non-current obligations	60,131	74,892
Deferred income taxes	3,370	2,820
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value $0.01, authorized 10,000 shares, none issued	0	0
Common stock, par value $0.01, authorized 175,000 shares, issued 46,689 and 46,508 shares at March 31, 2017 and 2016, respectively	467	465
Additional paid-in capital	447,671	452,821
Retained deficit	(251,651)	(299,510)
Accumulated other comprehensive income (loss)	(41,812)	(31,425)
Treasury stock, at cost (0 and 611 shares at March 31, 2017 and 2016, respectively)	0	(9,870)
Total stockholders’ equity	154,675	112,481
Total liabilities and stockholders’ equity	$ 734,528	$ 699,780

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Mar. 31, 2017	Mar. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	10,000	10,000
Preferred stock, issued shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	175,000	175,000
Common stock, issued shares	46,689	46,508
Treasury stock, shares	0	611

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 197,519,000	$ 188,029,000	$ 187,308,000	$ 184,935,000	$ 183,926,000	$ 177,184,000	$ 186,123,000	$ 187,590,000	$ 757,791,000	$ 734,823,000	$ 823,192,000
Operating costs and expenses:
Cost of sales									571,679,000	571,543,000	663,683,000
Selling, general and administrative expenses									107,868,000	101,446,000	98,533,000
Research and development									27,629,000	24,955,000	25,802,000
Restructuring charges									5,404,000	4,178,000	13,017,000
Write down of long-lived assets									10,279,000	0	0
Net (gain) loss on sales and disposals of assets									392,000	375,000	(221,000)
Total operating costs and expenses									723,251,000	702,497,000	800,814,000
Operating income (loss)	8,742,000	13,850,000	3,050,000	8,898,000	8,603,000	8,493,000	13,987,000	1,243,000	34,540,000	32,326,000	22,378,000
Other (income) expense:
Interest income									(24,000)	(14,000)	(15,000)
Interest expense									39,755,000	39,605,000	40,701,000
Change in value of TOKIN options									(10,700,000)	26,300,000	(2,100,000)
Non-operating (income) expense, net									(5,127,000)	(2,348,000)	(4,082,000)
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN									10,636,000	(31,217,000)	(12,126,000)
Income tax expense (benefit)									4,290,000	6,006,000	5,227,000
Income (loss) from continuing operations before equity income (loss) from TOKIN									6,346,000	(37,223,000)	(17,353,000)
Equity income (loss) from TOKIN									41,643,000	(16,406,000)	(2,169,000)
Income (loss) from continuing operations									47,989,000	(53,629,000)	(19,522,000)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent									0	0	5,379,000
Net income (loss)	$ 52,914,000	$ 12,278,000	$ (4,998,000)	$ (12,205,000)	$ (15,173,000)	$ (8,600,000)	$ 7,194,000	$ (37,050,000)	$ 47,989,000	$ (53,629,000)	$ (14,143,000)
Net income (loss) per basic share:
Loss from continuing operations (in dollars per share)									$ 1.03	$ (1.17)	$ (0.43)
Income (loss) from discontinued operations (in dollars per share)									0	0	0.12
Net income (loss) (in dollars per share)	$ 1.13	$ 0.26	$ (0.11)	$ (0.26)	$ (0.33)	$ (0.19)	$ 0.16	$ (0.81)	1.03	(1.17)	(0.31)
Net income (loss) per diluted share:
Loss from continuing operations (in dollars per share)									0.87	(1.17)	(0.43)
Income (loss) from discontinued operations (in dollars per share)									0	0	0.12
Net income (loss) (in dollars per share)	$ 0.93	$ 0.22	$ (0.11)	$ (0.26)	$ (0.32)	$ (0.19)	$ 0.14	$ (0.80)	$ 0.87	$ (1.17)	$ (0.31)
Weighted-average shares outstanding:
Basic (in shares)									46,552	46,004	45,381
Diluted (in shares)									55,389	46,004	45,381

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net income (loss)	$ 52,914	$ 12,278	$ (4,998)	$ (12,205)	$ (15,173)	$ (8,600)	$ 7,194	$ (37,050)	$ 47,989	$ (53,629)	$ (14,143)
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax									(5,708)	213
Other comprehensive income (loss)									(10,387)	(2,629)	(46,980)
Total comprehensive income (loss)									37,602	(56,258)	(61,123)
Foreign currency translation gains (losses), net of tax
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax									(15,284)	1,860	(35,467)
Other comprehensive income (loss)									(15,284)	1,860
Defined benefit pension plans, net of tax
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax									(536)	3,865
Amounts reclassified out of OCI									163	5,202	(12,977)
Other comprehensive income (loss)									(163)	5,202
Defined benefit post-retirement plan adjustments
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax									228	146
Amounts reclassified out of OCI									20	(45)	(305)
Other comprehensive income (loss)									(20)	(45)
Equity interest in investee’s other comprehensive income (loss)
Other comprehensive income (loss):
Amounts reclassified out of OCI									1,440	(8,276)	766
Other comprehensive income (loss)									1,440	(8,276)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax									(8,444)	(2,618)
Other comprehensive income (loss)									$ 3,274	$ (1,370)	$ 1,003

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	New Accounting Pronouncement, Early Adoption, Effect [Member]Additional Paid-In Capital	New Accounting Pronouncement, Early Adoption, Effect [Member]Retained Deficit
Balance (in shares) at Mar. 31, 2014		45,207
Balance at Mar. 31, 2014	$ 221,884,000	$ 465,000	$ 465,027,000	$ (231,738,000)	$ 18,184,000	$ (30,054,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(14,143,000)	0	0	(14,143,000)	0	0
Other comprehensive income (loss)	(46,980,000)	0	0	0	(46,980,000)	0
Issuance of restricted shares	(615,000)	$ 0	(8,238,000)	0	0	7,623,000
Issuance of restricted shares (in shares)		239
Stock-based compensation	4,512,000		4,512,000
Exercise of stock options	24,000	$ 0	(110,000)	0	0	134,000
Exercise of stock options (in shares)		6
Balance (in shares) at Mar. 31, 2015		45,452
Balance at Mar. 31, 2015	164,682,000	$ 465,000	461,191,000	(245,881,000)	(28,796,000)	(22,297,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(53,629,000)	0	0	(53,629,000)	0	0
Other comprehensive income (loss)	(2,629,000)	0	0	0	(2,629,000)	0
Issuance of restricted shares	(717,000)	$ 0	(13,144,000)	0	0	12,427,000
Issuance of restricted shares (in shares)		445
Stock-based compensation	4,774,000		4,774,000
Exercise of stock options	0	$ 0	0	0	0	0
Exercise of stock options (in shares)		0
Balance (in shares) at Mar. 31, 2016		45,897
Balance at Mar. 31, 2016	112,481,000	$ 465,000	452,821,000	(299,510,000)	(31,425,000)	(9,870,000)
Increase (Decrease) in Stockholders' Equity
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member]								$ 130,000
Net income (loss)	47,989,000	0	0		0	0
Other comprehensive income (loss)	(10,387,000)	0	0	0	(10,387,000)	0
Issuance of restricted shares	(1,261,000)	$ 0	(10,860,000)	0	0	9,599,000
Issuance of restricted shares (in shares)		588
Stock-based compensation	4,720,000		4,720,000
Exercise of stock options	1,133,000	$ 2,000	860,000	0	0	271,000
Exercise of stock options (in shares)		204
Balance (in shares) at Mar. 31, 2017		46,689
Balance at Mar. 31, 2017	$ 154,675,000	$ 467,000	$ 447,671,000	$ (251,651,000)	$ (41,812,000)	$ 0
Increase (Decrease) in Stockholders' Equity
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member]							$ 130,000	$ (130,000)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income (loss)	$ 47,989	$ (53,629)	$ (14,143)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Gain on sale of discontinued operations	0	0	5,644
Net cash provided by (used in) operating activities of discontinued operations	0	0	(679)
Depreciation and amortization	37,338	39,016	40,768
Non-cash debt and financing costs	761	859	2,032
Gain on early extinguishment of debt	0	0	(1,003)
Equity (income) loss from NEC TOKIN	(41,643)	16,406	2,169
Change in value of TOKIN options	10,700	(26,300)	2,100
Net (gain) loss on sales and disposals of assets	392	375	(221)
Stock-based compensation expense	4,720	4,774	4,512
Non-cash pension and other post-retirement benefits	2,543	3,013	2,742
Deferred income taxes	(19)	495	(2,084)
Write down of long-lived assets	10,279	0	0
Write down of receivables	64	24	52
Other, net	(327)	306	(7)
Changes in assets and liabilities:
Accounts receivable	(12)	(2,346)	8,220
Inventories	16,805	3,338	8,559
Prepaid expenses and other assets	(1,769)	13,588	(8,404)
Accounts payable	6,170	(5,982)	(2,879)
Accrued income taxes	144	(382)	(232)
Other operating liabilities	(1,068)	(13,790)	(7,256)
Net cash provided by (used in) operating activities	71,667	32,365	24,402
Investing activities:
Capital expenditures	(25,617)	(20,469)	(22,232)
Change in restricted cash	0	1,802	11,509
Acquisitions, net of cash received	0	2,892	0
Proceeds from sale of discontinued operations	0	0	9,564
Proceeds from sale of assets	19	971	4,788
Net cash provided by (used in) investing activities	(25,598)	(20,588)	3,629
Financing activities:
Proceeds from revolving line of credit	12,000	10,000	42,340
Payments of revolving line of credit	(12,000)	(9,600)	(27,342)
Proceeds from issuance of debt	2,314	0	0
Deferred acquisition payments	0	(3,000)	(19,527)
Payment of long-term debt	(2,428)	(481)	(21,733)
Proceeds from exercise of stock options	1,133	0	24
Purchase of treasury stock	(1,144)	(722)	(630)
Net cash provided by (used in) financing activities	(125)	(3,803)	(26,868)
Net increase (decrease) in cash and cash equivalents	45,944	7,974	1,163
Effect of foreign currency fluctuations on cash	(1,174)	668	(2,730)
Cash and cash equivalents at beginning of fiscal year	65,004	56,362	57,929
Cash and cash equivalents at end of fiscal year	109,774	65,004	56,362
Supplemental Cash Flow Statement Information:
Interest paid, net of capitalized interest	38,922	39,091	39,008
Income taxes paid	$ 4,153	$ 4,892	$ 6,611

Organization and Significant Ac

Organization and Significant Accounting Policies Organization and Significant Accounting Policies (Notes)	12 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Significant Accounting Policies	Organization and Significant Accounting Policies Nature of Business and Organization KEMET Corporation, which together with its subsidiaries is referred to herein as “KEMET” or the “Company” is a leading manufacturer of tantalum capacitors, multilayer ceramic capacitors, film capacitors, electrolytic capacitors, paper capacitors and solid aluminum capacitors. The Company is headquartered in Simpsonville, South Carolina, which is part of the greater Greenville metropolitan area, and has manufacturing plants and distribution centers located in the United States, Mexico, Europe and Asia. Additionally, the Company has wholly-owned foreign subsidiaries which primarily provide sales support for KEMET’s products in foreign markets. KEMET is organized into two business groups: the Solid Capacitor Business Group (“Solid Capacitors”) and the Film and Electrolytic Business Group (“Film and Electrolytic”). Each business group is responsible for the operations of certain manufacturing sites as well as related research and development efforts. Basis of Presentation Certain amounts for the condensed consolidating balance sheet for fiscal year 2016 have been revised to conform with the fiscal year 2017 presentation. Principles of Consolidation The accompanying consolidated financial statements of the Company include the accounts of its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Investment in entities in which the Company can exercise significant influence, but does not own a majority equity interest or otherwise control, are accounted for using the equity method and are included as investments in equity interests on the consolidated balance sheets. Cash Equivalents Cash equivalents of $2.1 million and $0.7 million at March 31, 2017 and 2016 , respectively, consist of money market accounts with an original term of three months or less. The Company considers all liquid debt instruments with original maturities of three months or less to be cash equivalents. Inventories Inventories are stated at the lower of cost or market. The carrying value of inventory is reviewed and adjusted based on slow moving and obsolete items, historical shipments, customer forecasts and backlog and technology developments. Inventory costs include material, labor and manufacturing overhead and most inventory costs are determined by the “first-in, first-out” (“FIFO”) method. For tool crib, a component of the Company’s raw material inventory, cost is determined under the average cost method. The Company has consigned inventory at certain customer locations totaling $8.8 million and $8.5 million at March 31, 2017 and 2016 , respectively. Property, Plant and Equipment Property and equipment are carried at cost. Depreciation is calculated principally using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the assets or the terms of the respective leases. Maintenance costs are expensed; expenditures for renewals and improvements are generally capitalized. Upon sale or retirement of property and equipment, the related cost and accumulated depreciation are removed and any gain or loss is recognized. A long-lived asset classified as held for sale is initially measured and reported at the lower of its carrying amount or fair value less cost to sell. Long-lived assets to be disposed of other than by sale are classified as held and used until the long-lived asset is disposed of. Depreciation expense, including amortization of capital leases, was $35.0 million , $36.9 million and $38.7 million for the fiscal years ended March 31, 2017 , 2016 and 2015 , respectively. The Company evaluates long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Reviews are regularly performed to determine whether facts and circumstances exist which indicate the carrying amount of assets may not be recoverable. The Company assesses the recoverability of its assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. If it is determined that the book value of a long-lived asset or asset group is not recoverable, an impairment loss would be calculated equal to the excess of the carrying amount of the long-lived asset over its fair value. The fair value is calculated as the discounted cash flows of the underlying assets or appraisal values. The Company has to make certain assumptions as to the future cash flows to be generated by the underlying assets. Those assumptions include the amount of volume increases, average selling price decreases, anticipated cost reductions, and the estimated remaining useful life of the equipment. Future changes in assumptions may negatively impact future valuations. Fair market value is based on the undiscounted cash flows that the assets will generate over their remaining useful lives or other valuation techniques. In future tests for recoverability, adverse changes in undiscounted cash flow assumptions could result in an impairment of certain long-lived assets that would require a non-cash charge to the Consolidated Statements of Operations and may have a material effect on the Company’s financial condition and operating results. See Note 9 “Impairment Charges” for further discussion of property, plant and equipment impairment charges. Goodwill and Other Intangible Assets Goodwill and other intangible assets with indefinite useful lives are not amortized but are subject to annual impairment tests during the fourth quarter of each fiscal year and when otherwise warranted. The Company evaluates its goodwill on a reporting unit basis which requires the Company to estimate the fair value of the reporting units based on the future net cash flows expected to be generated. The impairment test involves a comparison of the fair value of each reporting unit, with the corresponding carrying amounts. If the reporting unit’s carrying amount exceeds its fair value, then an indication exists that the reporting unit’s goodwill and intangible asset with indefinite useful lives may be impaired. The impairment to be recognized is measured by the amount by which the carrying value of the reporting unit’s goodwill being measured exceeds its implied fair value. The implied fair value of goodwill is the excess of the fair value of the reporting unit over the sum of the amounts assigned to identified net assets. As a result, the implied fair value of goodwill is generally the residual amount that results from subtracting the value of net assets including all tangible assets and identified intangible assets from the fair value of the reporting unit’s fair value. The Company determined the fair value of its reporting units using an income-based, discounted cash flow (“DCF”) analysis, and market-based approaches (Guideline Publicly Traded Company Method and Guideline Transaction Method) which examine transactions in the marketplace involving the sale of the stocks of similar publicly owned companies, or the sale of entire companies engaged in operations similar to KEMET. The Company evaluates the value of its other indefinite-lived intangible assets (trademarks) using an income-based, relief from royalty analysis. In addition to the previously described reporting unit valuation techniques, the Company’s goodwill and intangible assets with indefinite useful lives impairment assessment also considers the Company’s aggregate fair value based upon the value of the Company’s outstanding shares of common stock. The impairment review of goodwill and intangible assets with indefinite useful lives are subjective and involve the use of estimates and assumptions in order to calculate the impairment charges. Estimates of business enterprise fair value use discounted cash flow and other fair value appraisal models and involve making assumptions for future sales trends, market conditions, growth rates, cost reduction initiatives and cash flows for the next several years. Future changes in assumptions may negatively impact future valuations. Equity Method Investment Investments and ownership interests are accounted for under the equity method of accounting if the Company has the ability to exercise significant influence, but not control, over the entity. Investments accounted for under the equity method are initially recorded at cost, and the difference between the basis of the Company’s investment and the underlying equity in the net assets of the company at the investment date, is amortized over the lives of the related assets that gave rise to the difference. The Company’s share of earnings or losses under the equity method investments and basis difference amortization is reported in the consolidated statements of operations as “Equity income (loss) from TOKIN.” The Company reviews its investments and ownership interests accounted for under the equity method of accounting for impairment whenever events or changes in circumstances indicate a loss in the value of the investment may be other than temporary. Deferred Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in fiscal years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets unless it is more likely than not that such assets will be realized. Stock-based Compensation Stock-based compensation for stock options is estimated on the date of grant using the Black-Scholes option-pricing model. The Black-Scholes model takes into account volatility in the price of the Company’s stock, the risk-free interest rate, the estimated life of the equity-based award, the closing market price of the Company’s stock on the grant date and the exercise price. The estimates utilized in the Black-Scholes calculation involve inherent uncertainties and the application of management judgment. In addition, the Company is required to estimate the expected forfeiture rate and only recognize expense for those options expected to vest. Stock-based compensation cost for restricted stock is measured based on the closing fair market value of the Company’s common stock on the date of grant. The Company recognizes stock-based compensation cost for arrangements with cliff vesting as expense ratably on a straight-line basis over the requisite service period. The Company recognizes stock-based compensation cost for arrangements with graded vesting as expense on an accelerated basis over the requisite service period. Concentrations of Credit and Other Risks The Company sells to customers globally. Credit evaluations of its customers’ financial condition are performed periodically, and the Company generally does not require collateral from its customers. One customer, TTI, Inc., an electronics distributor, accounted for $104.4 million , $99.3 million and $124.4 million of the Company’s net sales in fiscal years ended March 31, 2017 , 2016 , and 2015 , respectively. There were no customers’ accounts receivable balances exceeding 10% of gross accounts receivable at March 31, 2017 or March 31, 2016 . Consistent with industry practice, the Company utilizes electronics distributors for a large percentage of its sales. Electronics distributors are an effective means to distribute the products to end-users. For fiscal years ended March 31, 2017 , 2016 , and 2015 , net sales to electronics distributors accounted for 46% , 42% and 45% , respectively, of the Company’s total net sales. Foreign Subsidiaries Financial statements of certain of the Company’s foreign subsidiaries are prepared using the U.S. dollar as their functional currency. Translation of these foreign operations, as well as gains and losses from non-U.S. dollar foreign currency transactions, such as those resulting from the settlement of foreign receivables or payables, are reported in the Consolidated Statements of Operations. Translation of other foreign operations to U.S. dollars occurs using the current exchange rate for balance sheet accounts and an average exchange rate for results of operations. Such translation gains or losses are recognized as a component of equity in accumulated other comprehensive income (“AOCI”). Comprehensive Income (Loss) Comprehensive income (loss) consists of net income (loss), currency translation gains (losses), defined benefit plan adjustments including those adjustments which result from changes in net prior service credit and actuarial gains (losses), equity interest in investee’s other comprehensive income (loss), and gains (losses) on derivatives held as cash flow hedges, and is presented in the Consolidated Statements of Comprehensive Income (Loss). The following summary sets forth the components of accumulated other comprehensive income (loss) contained in the stockholders’ equity section of the Consolidated Balance Sheets (amounts in thousands): Foreign Currency Translation Gains (Losses) Defined Benefit Post-retirement Plan Adjustments Defined Benefit Pension Plans (3) Ownership Share of Equity Method Investees’ Other Comprehensive Income (Loss) Foreign Exchange Contracts Net Accumulated Other Comprehensive Income (Loss) Balance at March 31, 2015 $ (12,132 ) $ 1,159 $ (20,363 ) $ 1,537 $ 1,003 $ (28,796 ) Other comprehensive income (loss) before reclassifications (1) 1,860 146 3,865 (8,276 ) 2,618 213 Amounts reclassified in (out) of AOCI (1) — (191 ) 1,337 — (3,988 ) (2,842 ) Other comprehensive income (loss) 1,860 (45 ) 5,202 (8,276 ) (1,370 ) (2,629 ) Balance at March 31, 2016 (10,272 ) 1,114 (15,161 ) (6,739 ) (367 ) (31,425 ) Other comprehensive income (loss) before reclassifications (2) (15,284 ) 228 (536 ) 1,440 8,444 (5,708 ) Amounts reclassified in (out) of AOCI (2) — (208 ) 699 — (5,170 ) (4,679 ) Other comprehensive income (loss) (15,284 ) 20 163 1,440 3,274 (10,387 ) Balance at March 31, 2017 $ (25,556 ) $ 1,134 $ (14,998 ) $ (5,299 ) $ 2,907 $ (41,812 ) _______________________________________________________________________________ (1) Activity within foreign currency translation gains and defined benefit pension plans are net of a tax expense of zero and $0.3 million , respectively. (2) Activity within foreign currency translation losses and defined benefit pension plans are net of a tax benefit of zero and $0.7 million , respectively. (3) Balance is net of a tax benefit of $2.7 million , $2.0 million , and $2.3 million as of March 31, 2017 , March 31, 2016 , and March 31, 2015 , respectively. Stock Warrant Concurrent with the consummation of a credit facility in May 2009, the Company issued K Financing, LLC (“K Financing”) a warrant (the “Platinum Warrant”) to purchase up to 26,848,484 shares of the Company’s common stock, subject to certain adjustments, representing approximately 49.9% of the Company’s outstanding common stock at the time of issuance on a post-exercise basis. The Platinum Warrant was subsequently transferred to K Equity, LLC (“K Equity”). The Platinum Warrant is exercisable at a purchase price of $1.05 per share. The Platinum Warrant may be exercised in exchange for cash, by means of net settlement of a corresponding portion of amounts owed by the Company under the Revised Amended and Restated Platinum Credit Facility, by cashless exercise to the extent of appreciation in the value of the Company’s common stock above the exercise price of the Platinum Warrant, or by combination of the preceding alternatives. Warrants may be classified as assets or liabilities (derivative accounting), temporary equity, or permanent equity, depending on the terms of the specific warrant agreement. The Platinum Warrant issued to K Financing under the Platinum Credit Facility (as defined below) does not meet the definition of a derivative as it is indexed to the Company’s own stock, as such, the Platinum Warrant is classified as a component of equity. There were 8,416,815 shares subject to the Platinum Warrant as of March 31, 2017 . The Platinum Warrant expires on June 30, 2019. Fair Value Measurement The Company utilizes three levels of inputs to measure the fair value of (a) nonfinancial assets and liabilities that are recognized or disclosed at fair value in the Company’s consolidated financial statements on a recurring basis (at least annually) and (b) all financial assets and liabilities. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The first two inputs are considered observable and the last is considered unobservable. The levels of inputs are as follows: • Level 1—Quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Assets and liabilities are measured at fair value on a recurring basis as of March 31, 2017 and 2016 are as follows (amounts in thousands): Carrying Value March 31, 2017 Fair Value March 31, 2017 Fair Value Measurement Using Level 1 Level 2 (2) Level 3 Assets and Liabilities: Money markets (1) $ 2,055 $ 2,055 $ 2,055 $ — $ — Total debt (388,211 ) (385,251 ) (353,000 ) (32,251 ) — TOKIN options, net (3) (9,900 ) (9,900 ) — — (9,900 ) Carrying Fair Fair Value Measurement Level 1 Level 2 (2) Level 3 Assets and Liabilities: Money markets (1) $ 738 $ 738 $ 738 $ — $ — Total debt (387,833 ) (284,261 ) (254,713 ) (29,548 ) — TOKIN options, net (3) (20,600 ) (20,600 ) — — (20,600 ) _______________________________________________________________________________ (1) Included in the line item “Cash and cash equivalents” on the Consolidated Balance Sheets. (2) The valuation approach used to calculate fair value was a discounted cash flow based on the borrowing rate for each respective debt facility. (3) See Note 5 , “Investment in TOKIN,” for a description of the TOKIN options. The value of the options is interrelated and depends on the enterprise value of TOKIN Corporation and its EBITDA over the duration of the instruments. Therefore, the options have been valued using option pricing methods in a Monte Carlo simulation. Changes to the Monte Carlo simulation inputs could have a material effect on the value of the TOKIN options. The table below summarizes TOKIN options valuation activity using significant unobservable inputs (Level 3) (amounts in thousand): March 31, 2015 $ 5,700 Change in value of TOKIN options (26,300 ) March 31, 2016 $ (20,600 ) Change in value of TOKIN options 10,700 March 31, 2017 $ (9,900 ) Revenue Recognition The Company ships products to customers based upon firm orders and revenue is recognized when the sales process is complete. This occurs when products are shipped to the customer in accordance with the terms of an agreement of sale, there is a fixed or determinable selling price, title and risk of loss have been transferred and collectability is reasonably assured. Based on product availability, customer requirements and customer consent, KEMET may ship products earlier than the initial planned ship date. Shipping and handling costs are included in cost of sales. A portion of sales is related to products designed to meet customer specific requirements. These products typically have stricter tolerances making them useful to the specific customer requesting the product and to customers with similar or less stringent requirements. The Company recognizes revenue when title to the products transfers to the customer. A portion of sales is made to distributors under agreements allowing certain rights of return and price protection on unsold merchandise held by distributors. The Company’s distributor policy includes inventory price protection and “ship-from-stock and debit” (“SFSD”) programs common in the industry. KEMET’s SFSD program provides authorized distributors with the flexibility to meet marketplace prices by allowing them, upon a case-by-case pre-approved basis, to adjust their purchased inventory cost to correspond with current market demand. Requests for SFSD adjustments are considered on an individual basis, require a pre-approved cost adjustment quote from their local KEMET sales representative and apply only to a specific customer, part, a specified special price amount, a specified quantity, and is only valid for a specific period of time. To estimate potential SFSD adjustments corresponding with current period sales, KEMET records a sales reserve based on historical SFSD credits, distributor inventory levels, and certain accounting assumptions, all of which are reviewed quarterly. Most of the Company’s distributors have the right to return to KEMET a certain portion of the purchased inventory, which, in general, does not exceed 6% of their purchases from the previous fiscal quarter. KEMET estimates future returns based on historical patterns of the distributors and records an allowance on the Consolidated Balance Sheets. The Company also offers volume-based rebates on a case-by-case basis to certain customers in each of the Company’s sales channels. The establishment of sales allowances is recognized as a component of the line item “Net sales” on the Consolidated Statements of Operations, while the associated reserves are included in the line item “Accounts receivable, net” on the Consolidated Balance Sheets. Estimates used in determining sales allowances are subject to various factors. This includes, but is not limited to, changes in economic conditions, pricing changes, product demand, inventory levels in the supply chain, the effects of technological change, and other variables that might result in changes to the Company’s estimates. The Company provides a limited warranty to customers that the Company’s products meet certain specifications. The warranty period is generally limited to one year , and the Company’s liability under the warranty is generally limited to a replacement of the product or refund of the purchase price of the product. Warranty costs were less than 1% of net sales for the fiscal years ended March 31, 2017 , 2016 and 2015 . The Company recognizes warranty costs when losses are both probable and reasonably estimable. Allowance for Doubtful Accounts The Company evaluates the collectability of trade receivables through the analysis of customer accounts. When the Company becomes aware that a specific customer has filed for bankruptcy, has begun closing or liquidation proceedings, has become insolvent or is in financial distress, the Company records a specific allowance for the doubtful account to reduce the related receivable to the amount the Company believes is collectible. If circumstances related to specific customers change, the Company’s estimates of the recoverability of receivables could be adjusted. Accounts are written off after all means of collection, including legal action, have been exhausted. Shipping and Handling Costs The Company’s shipping and handling costs are reflected in the line item “Cost of sales” on the Consolidated Statements of Operations. Shipping and handling costs were $16.4 million , $16.1 million , and $17.9 million in the fiscal years ended March 31, 2017 , 2016 and 2015 , respectively. Income (Loss) per Share Basic income (loss) per share is computed using the weighted-average number of shares outstanding. Diluted income (loss) per share is computed using the weighted-average number of shares outstanding adjusted for the incremental shares attributed to the Platinum Warrant, outstanding employee stock grants if such effects are dilutive. Environmental Cost The Company recognizes liabilities for environmental remediation when it is probable that a liability has been incurred and can be reasonably estimated. The Company determines its liability on a site-by-site basis, and it is not discounted or reduced for anticipated recoveries from insurance carriers. In the event of anticipated insurance recoveries, such amounts would be presented on a gross basis in other current or non-current assets, as appropriate. Expenditures that extend the life of the related property or mitigate or prevent future environmental contamination are capitalized. Derivative Financial Instruments Derivative financial instruments have been utilized by the Company to reduce exposures to volatility of foreign currencies impacting the sales and costs of its products. The Company accounts for derivatives and hedging activities in accordance with Accounting Standards Codification 815 (“ASC 815”), “ Derivatives and Hedging.” See Note 13 for further discussion of derivative financial instruments. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make a number of estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements. In addition, they affect the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include impairment of property and equipment, intangibles and goodwill; allowances for doubtful accounts, price protection and customers’ returns, and deferred income taxes; and assets and obligations related to employee benefits. Actual results could differ from these estimates and assumptions. Impact of Recently Issued Accounting Standards In March 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The update requires employers to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of Operating income. The effective date of this update is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The update requires retrospective application to all periods presented. The Company plans to adopt this guidance in the first quarter of fiscal year 2018, and is currently performing its assessment of the impact of adopting the guidance; however, based on its expectations for the fiscal year ended March 31, 2018, the Company believes it will likely have a material impact due to the reclassification of pension and post-retirement benefit cost from Operating income to Non-operating income. Excluding the service costs, the net periodic pension and post-retirement benefit cost for the fiscal year ended March 31, 2018 is expected to be $1.3 million. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other. The update eliminates the requirement to calculate the implied fair value of goodwill to measure the amount of impairment loss, if any, under the second step of the current goodwill impairment test. Under the update, the goodwill impairment loss would be measured as the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The effective date of this update is for annual reporting periods beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this guidance on the Company’s consolidated financial statements, however the adoption of this guidance is not expected to have a significant effect on the Company's consolidated financial position, results of operations, or cash flows. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory. The update requires entities to recognize the income tax consequences of many intercompany asset transfers at the transaction date. The seller and buyer will immediately recognize the current and deferred income tax consequences of an intercompany transfer of an asset other than inventory. The tax consequences were previously deferred. The effective date of this update is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The update requires modified retrospective transition method which is a cumulative effect adjustment to retained earnings as of the beginning of the first effective reporting period. The Company plans to adopt this guidance in the first quarter of fiscal year 2018, however the impact of the adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update clarifies how cash receipts and cash payments in certain transactions are presented and classified in the statement of cash flows. The effective date of this update is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The update requires retrospective application to all periods presented but may be applied prospectively if retrospective application is impracticable. The Company is currently evaluating the impact of the adoption of this guidance on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation. This guidance changes several aspects of the accounting for share-based payment award transactions, including: (1) Accounting and Cash Flow Classification for Excess Tax Benefits and Deficiencies, (2) Forfeitures, and (3) Tax Withholding Requirements and Cash Flow Classification. This ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2016. Early application is permitted, and KEMET adopted ASU No. 2016-09 as of April 1, 2016. The Company elected to discontinue estimating forfeitures that are expected to occur and recorded a cumulative effect adjustment to retained earnings of $130,000 as of April 1, 2016. There was no cumulative adjustment related to the excess tax benefits as the Company did not have an additional paid in capital pool of excess tax benefits. The adoption did not have a significant impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases, as modified by ASU 2017-03, Transition and Open Effective Date Information. The ASU requires lessees to recognize a right-of-use asset and a lease liability for virtually all of their leases (other than short-term leases). The guidance is to be applied using a modified retrospective approach at the beginning of the earliest comparative period in the financial statements. This ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2018. Early application is permitted. The Company is currently in the process of assessing the impact the adoption of this guidance will have on the Company’s con

Debt

Debt	12 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Debt	Debt A summary of debt is as follows (amounts in thousands): March 31, 2017 2016 10.5% Senior Notes, net (1) $ 352,472 $ 353,952 Revolving line of credit 33,881 33,881 Other, net (2) 1,858 — Total debt 388,211 387,833 Current maturities (2,000 ) (2,000 ) Total long-term debt $ 386,211 $ 385,833 ______________________________________________________________________________ (1) As noted in Note 1, “Basis of Financial Statements Presentation,” ASU No. 2015-03, Interest - Imputation of Interest, was adopted as of April 1, 2016. As such, debt issuance cost, if any, is included within the respective debt balance. Amounts shown are net of premium and debt issuance costs of $0.5 million and $1.0 million as of March 31, 2017 and March 31, 2016 , respectively which reduce the 10.5% Senior Notes balance. (2) The amount shown is net of discount of $0.5 million as of March 31, 2017 . The line item “Interest expense” on the Consolidated Statements of Operations for the fiscal years 2017 , 2016 and 2015 , respectively, is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Contractual interest expense $ 38,825 $ 39,087 $ 38,953 Capitalized interest (154 ) (509 ) (237 ) Amortization of debt issuance costs 1,390 1,392 1,480 Amortization of debt (premium) discount (788 ) (745 ) (407 ) Imputed interest on acquisition related obligations 159 212 741 Interest expense on capital leases 323 168 171 Total interest expense $ 39,755 $ 39,605 $ 40,701 Revolving Line of Credit On September 30, 2010, KEMET Electronics Corporation (“KEC”) and KEMET Electronics Marketing (S) Pte Ltd. (“KEMET Singapore”) (each a “Borrower” and, collectively, the “Borrowers”) entered into a Loan and Security Agreement (the “Loan and Security Agreement”), with Bank of America, N.A, as the administrative agent and the initial lender. The Loan and Security Agreement provides a $50.0 million revolving line of credit, which is bifurcated into a U.S. facility (for which KEC is the Borrower) and a Singapore facility (for which KEMET Singapore is the Borrower). A portion of the U.S. facility and the Singapore facility can be used to issue letters of credit. On December 19, 2014, the Loan and Security Agreement was amended and as a result the expiration was extended to December 19, 2019. Under the terms of amended Loan and Security Agreement, the revolving credit facility has increased to $60.0 million , bifurcated into a U.S. facility (for which KEC is the Borrower) and a Singapore facility (for which KEMET Singapore is the Borrower). The amendment contains an accordion feature permitting the U.S. Borrowers to increase commitments under the facility by an aggregate principal amount up to $15.0 million (for a total facility of $75.0 million ), subject to terms and documentation acceptable to the Agent and/or the Lenders. In addition, KEMET Foil Manufacturing, LLC (“KEMET Foil”), KEMET Blue Powder Corporation (“KEMET Blue Powder”) and The Forest Electric Company were included as Borrowers under the U.S. facility. The principal features of the Loan and Security Agreement as amended are reflected in the description below. The size of the U.S. facility and Singapore facility can fluctuate as long as the Singapore facility does not exceed $30.0 million and the total facility does not exceed $60.0 million . Borrowings under the U.S. and Singapore facilities are subject to a borrowing base consisting of: • in the case of the U.S. facility, (A) 85% of KEC’s accounts receivable that satisfy certain eligibility criteria plus (B) the lesser of (i) $6.0 million and (ii) (a) on or prior to agent’s receipt of an updated inventory appraisal and agent’s approval thereof, 40% of the value of Eligible Inventory (as defined in the agreement) and (b) upon agent’s receipt of an updated inventory appraisal, 85% of the net orderly liquidation value of the Eligible Inventory (as defined in the agreement) plus (C) the lesser of $5.1 million and 80% of the net orderly liquidation percentage of the appraised value of equipment that satisfies certain eligibility criteria, as reduced on the first day of each fiscal quarter occurring after April 30, 2014 in an amount equal to one-twentieth (1/20) of such appraised value less (D) certain reserves, including certain reserves imposed by the administrative agent in its permitted discretion; and • in the case of the Singapore facility, (A) 85% of KEMET Singapore’s accounts receivable that satisfy certain eligibility criteria as further specified in the Loan and Security Agreement, less (B) certain reserves, including certain reserves imposed by the administrative agent in its permitted discretion. Interest is payable on borrowings monthly at a rate equal to the London Interbank Offer Rate (“LIBOR”) or the base rate, plus an applicable margin, as selected by the Borrower. Depending upon the fixed charge coverage ratio of KEMET Corporation and its subsidiaries on a consolidated basis as of the latest test date, the applicable margin under the U.S. facility varies between 2.00% and 2.50% for LIBOR advances and 1.00% and 1.50% for base rate advances, and under the Singapore facility varies between 2.25% and 2.75% for LIBOR advances and 1.25% and 1.75% for base rate advances. The base rate is subject to a floor that is 100 basis points above LIBOR. An unused line fee is payable monthly in an amount equal to a per annum rate equal to (a) 0.50% , if the average daily balance of revolver loans and stated amount of letters of credit was 50% or less of the revolver commitments during the preceding calendar month, or (b) 0.375% , if the average daily balance of revolver loans and stated amount of letters of credit was more than 50% of the Revolver Commitment during the preceding calendar month. A customary fee is also payable to the administrative agent on a quarterly basis. KEC’s ability to draw funds under the U.S. facility and KEMET Singapore’s ability to draw funds under the Singapore facility are conditioned upon, among other matters: • the absence of the existence of a Material Adverse Effect (as defined in the Loan and Security Agreement); • the absence of the existence of a default or an event of default under the Loan and Security Agreement; and • the representations and warranties made by KEC and KEMET Singapore in the Loan and Security Agreement continuing to be correct in all material respects. KEMET and KEC’s 100% owned domestic subsidiaries (“Guarantor Subsidiaries”) guarantee the U.S. facility obligations and the U.S. facility obligations are secured by a lien on substantially all of the assets of KEC and the Guarantor Subsidiaries (other than assets that secure the 10.5% Senior Notes due 2018). The collection accounts of the Borrowers and Guarantor Subsidiaries are subject to a daily sweep into a concentration account and the concentration account will become subject to full cash dominion in favor of the administrative agent (i) upon an event of default, (ii) if for five consecutive business days, aggregate availability of all facilities has been less than the greater of (A) 12.5% of the aggregate revolver commitments at such time and (B) $7.5 million , or (iii) if for five consecutive business days, availability of the U.S. facility has been less than $3.75 million (each such event, a “Cash Dominion Trigger Event”). KEC and the Guarantor Subsidiaries guarantee the Singapore facility obligations. In addition to the assets that secure the U.S. facility, the Singapore obligations are also secured by a pledge of 100% of the stock of KEMET Singapore and a security interest in substantially all of KEMET Singapore’s assets. KEMET Singapore’s bank accounts are maintained at Bank of America and upon a Cash Dominion Trigger Event will become subject to full cash dominion in favor of the administrative agent. A fixed charge coverage ratio of at least 1.0 :1.0 must be maintained as of the last day of each fiscal quarter ending immediately prior to or during any period in which any of the following occurs and is continuing until none of the following occurs for a period of at least forty-five consecutive days: (i) an event of default, (ii) aggregate availability of all facilities has been less than the greater of (A) 12.5% of the aggregate revolver commitments at such time and (B) $7.5 million , or (iii) availability of the U.S. facility has been less than $3.75 million . The fixed charge coverage ratio tests the EBITDA and fixed charges of KEMET and its subsidiaries on a consolidated basis. In addition, the Loan and Security Agreement includes various covenants that, subject to exceptions, limit the ability of KEMET and its direct and indirect subsidiaries to, among other things: incur additional indebtedness; create liens on assets; engage in mergers, consolidations, liquidations and dissolutions; sell assets (including pursuant to sale leaseback transactions); pay dividends and distributions on or repurchase capital stock; make investments (including acquisitions), loans, or advances; prepay certain junior indebtedness; engage in certain transactions with affiliates; enter into restrictive agreements; amend material agreements governing certain junior indebtedness; and change its lines of business. The Loan and Security Agreement includes certain customary representations and warranties, affirmative covenants and events of default, which are set forth in more detail in the Loan and Security Agreement. Debt issuance costs related to the Loan and Security Agreement, net of amortization, were $0.2 million as of March 31, 2017 and 2016 ; these costs will be amortized over the term of the Loan and Security Agreement. The Company had the following activity for the twelve month period ended March 31, 2017 and resulting balances under the revolving line of credit (amounts in thousands, excluding percentages): March 31, Twelve Month Period Ended March 31, 2017 March 31, 2017 Outstanding Borrowings Additional Borrowings Repayments Outstanding Borrowings Rate (1) (2) Due Date U.S. Facility $ 19,881 $ 12,000 $ — $ 31,881 5.000 % December 19, 2019 Singapore Facility Singapore Borrowing 1 12,000 — 12,000 — — — Singapore Borrowing 2 (3) 2,000 — — 2,000 3.375 % April 10, 2017 Total Facilities $ 33,881 $ 12,000 $ 12,000 $ 33,881 ______________________________________________________________________________ (1) For U.S. borrowings, Base Rate plus 1.5% , as defined in the Loan and Security Agreement. (2) For Singapore borrowings, LIBOR, plus a spread of 2.50% as of March 31, 2017 . (3) The Company repaid the Singapore Borrowing 2 in full on the due date of April 10, 2017. These were the only borrowings under the revolving line of credit, and the Company’s available borrowing capacity under the Loan and Security Agreement was $29.2 million as of March 31, 2017 . The borrowing capacity has increased from the prior year due to an improvement in the fixed charged coverage ratio and and increase in the eligible account receivable collateral. 10.5% Senior Notes On May 5, 2010, the Company issued 10.5% Senior Notes with an aggregate principal amount of $230.0 million which resulted in net proceeds to the Company of $222.2 million . The 10.5% Senior Notes were issued pursuant to an Indenture (the “ 10.5% Senior Notes”), dated as of May 5, 2010, as amended, by and among the Company, Guarantor Subsidiaries and Wilmington Trust Company, as trustee (the “Trustee”). The 10.5% Senior Notes will mature on May 1, 2018, and bear interest at a stated rate of 10.5% per annum, payable semi-annually in cash in arrears on May 1 and November 1 of each year, beginning on November 1, 2010. The 10.5% Senior Notes are senior obligations of the Company and will be guaranteed by each of the Guarantor Subsidiaries and secured by a first priority lien on 51% of the capital stock of certain of the Company’s foreign restricted subsidiaries. The terms of the 10.5% Senior Notes Indenture, among other things, limit the ability of the Company and its restricted subsidiaries to (i) incur additional indebtedness or issue certain preferred stock; (ii) pay dividends on, or make distributions in respect of, their capital stock or repurchase their capital stock; (iii) make certain investments or other restricted payments; (iv) sell certain assets; (v) create liens or use assets as security in other transactions; (vi) enter into sale and leaseback transactions; (vii) merge, consolidate or transfer or dispose of substantially all of their assets; (viii) engage in certain transactions with affiliates; and (ix) designate their subsidiaries as unrestricted subsidiaries. These covenants are subject to a number of important limitations and exceptions that are described in the 10.5% Senior Notes Indenture. The Company is in compliance with these debt covenants. At any time, at its option, the Company may redeem the 10.5% Senior Notes, in whole or in part, at the redemption price of 100% of the Principal amount. The Company may also at any time and from time to time purchase 10.5% Senior Notes in the open market, subject to compliance with the Indenture. Upon the occurrence of a change of control triggering event specified in the 10.5% Senior Notes Indenture, the Company must offer to purchase the 10.5% Senior Notes at a redemption price equal to 101% of the principal amount thereof, plus accrued and unpaid interest, if any, to the date of purchase. The 10.5% Senior Notes Indenture provides for customary events of default (subject in certain cases to customary grace and cure periods), which include nonpayment, breach of covenants in the 10.5% Senior Notes Indenture, payment defaults or acceleration of other indebtedness, a failure to pay certain judgments and certain events of bankruptcy and insolvency. The 10.5% Senior Notes Indenture also provides for events of default with respect to the collateral, which include default in the performance of (or repudiation, disaffirmation or judgment of unenforceability or assertion of unenforceability) by the Company or a Guarantor with respect to the provision of security documents under the 10.5% Senior Notes Indenture. These events of default are subject to a number of important qualifications, limitations and exceptions that are described in the 10.5% Senior Notes Indenture. Generally, if an event of default occurs, the Trustee or holders of at least 25% in principal amount of the then outstanding 10.5% Senior Notes may declare the principal of and accrued but unpaid interest, including additional interest, on all the 10.5% Senior Notes to be due and payable. On March 27, 2012 and April 3, 2012, the Company completed the issuance of $110.0 million and $15.0 million aggregate principal amount of its 10.5% Senior Notes due May 1, 2018, respectively, at an issue price of 105.5% of the principal amount plus accrued interest from November 1, 2011. The issuance resulted in a debt premium of $6.1 million which will be amortized over the term of the 10.5% Senior Notes. The Senior Notes were issued as additional notes under the indenture, dated May 5, 2010, among the Company, the Guarantor Subsidiaries party thereto and Wilmington Trust Company, as trustee. In total, debt issuance costs related to the 10.5% Senior Notes, net of amortization, were $1.4 million and $2.8 million as of March 31, 2017 and 2016 ; these costs will be written off in the first quarter of fiscal year 2018 upon the extinguishment of the 10.5% Senior Notes (see Note 19 , “ Subsequent Events ” for additional information). The Company had interest payable related to the 10.5% Senior Notes included in the line item “Accrued expenses” on its Consolidated Balance Sheets of $15.4 million and $15.5 million at March 31, 2017 and 2016 , respectively. The effective interest rate for the Senior Notes was 10.2% and 10.3% for the years ended March 31, 2017 and 2016 , respectively. Other Debt In January 2017, KEMET Electronics Portugal, S.A., a wholly owned subsidiary received an interest free loan from the Portuguese Government in the amount of EUR 2.2 million (or $2.4 million ) to be used for fixed asset purchases. The loan has a total term of eight years ending February 1, 2025. The loan will be repaid through semi-annual payments in the amount of EUR 185 thousand (or $198 thousand ) beginning on August 1, 2019. Since the debt is non-interest bearing, we have created a debt discount in the amount of EUR 0.5 million (or $0.6 million ) with an offsetting reduction to fixed assets. This discount will be amortized over the life of the loan through interest expense. If certain conditions are met such as increased headcount, increased revenue and increased gross value added, a portion of the loan could be forgiven during fiscal year 2020. The following table highlights the Company’s annual cash maturities of debt (amounts in thousands): Annual Maturities of Debt Fiscal Years Ended March 31, 2018 2019 2020 2021 2022 Thereafter 10.5% Senior Notes (1) $ — $ 353,000 $ — $ — $ — $ — Revolving line of credit 2,000 — 31,881 — — — Other — — 396 396 396 1,187 $ 2,000 $ 353,000 $ 32,277 $ 396 $ 396 $ 1,187 (1) Subsequent to year-end, the Company entered into a $345 million Term Loan Credit Agreement. The proceeds, together with cash generated through the TOKIN acquisition, were used to fund the redemption of all of KEMET’s outstanding 10.5% Senior Notes due 2018 (the “Senior Notes”). See Note 19 , “ Subsequent Events ” for additional information.

Restructuring

Restructuring	12 Months Ended
	Mar. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring The Company has implemented restructuring plans which include programs to increase competitiveness by removing excess capacity, relocating production to lower cost locations, and eliminating unnecessary costs throughout the Company. A summary of the expenses aggregated on the Consolidated Statements of Operations line item “Restructuring charges” in the fiscal years ended March 31, 2017 , 2016 and 2015 , is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Manufacturing and sales office relocation costs $ 3,190 $ 2,375 $ 2,672 Personnel reduction costs 2,214 1,803 10,345 Restructuring charges $ 5,404 $ 4,178 $ 13,017 Fiscal Year Ended March 31, 2017 The Company incurred $5.4 million in restructuring charges in the fiscal year ended March 31, 2017 including $2.2 million of personnel reduction costs and $3.2 million of relocation costs. The personnel reduction costs correspond with the following: $0.3 million related to the consolidation of certain Solid Capacitor manufacturing in Matamoros, Mexico ; $0.4 million for headcount reductions related to the shut-down of operations for KEMET Foil Manufacturing, LLC (“KFM”) in Knoxville, Tennessee; $0.3 million related to headcount reductions in Europe (primarily Italy and Landsberg, Germany) corresponding with the relocation of certain production lines and laboratories to lower cost regions ; $0.3 million for overhead reductions in Sweden ; $0.3 million in U.S. headcount reductions related to the relocation of global marketing functions to the Company’s Fort Lauderdale, Florida office ; $0.3 million in headcount reductions related to the transfer of certain Tantalum production from Simpsonville, South Carolina to Victoria, Mexico ; $0.2 million in overhead reductions for the relocation of R&D operations from Weymouth, England to Evora, Portugal ; and $0.1 million in manufacturing headcount reductions related to the relocation of the K-Salt operations to the existing Matamoros, Mexico plant. The manufacturing relocation costs of $3.2 million include $1.9 million in expenses related to contract termination costs related to the shut-down of operations for KFM ; $0.6 million in expenses related to the relocation of the K-Salt operations to the existing Matamoros, Mexico plant ; $0.6 million for transfers of Film and Electrolytic production lines and R&D functions to lower cost regions ; and $0.1 million related to the transfer of certain Tantalum production from Simpsonville, South Carolina to Victoria, Mexico . Fiscal Year Ended March 31, 2016 The Company incurred $4.2 million in restructuring charges in the fiscal year ended March 31, 2016 including $1.8 million related to personnel reduction costs and $2.4 million of relocation costs. The personnel reduction costs correspond with the following: $0.9 million for headcount reductions in Matamoros, Mexico related to the relocation of certain Solid Capacitor manufacturing from Matamoros, Mexico to Victoria, Mexico; $0.6 million related to a headcount reduction in Suzhou, China for the Film & Electrolytic production line transfer from Suzhou, China to Anting, China; $0.5 million related to the consolidation of certain Solid Capacitor manufacturing in Victoria, Mexico; $0.5 million for headcount reductions related to the outsourcing of the Company's information technology function and overhead reductions in North America and Europe; and $0.3 million for headcount reductions in Europe (primarily Landsberg, Germany). These personnel reduction costs were partially offset by a $1.0 million credit to expense in Italy due to the partial reversal of a severance accrual. The Company originally recorded the accrual in the third quarter of fiscal year 2015 corresponding with a plan to reduce headcount by 50 employees. Under the plan, 24 employees were terminated. However, due to unexpected workforce attrition combined with achieving other cost reduction goals, the Company decided not to complete the remaining headcount reduction. Consequently, the Company reversed the remaining accrual during the second quarter of fiscal year 2016. The $2.4 million relocation costs include $1.1 million for the Landsberg, Germany shut-down including relocating equipment to Pontecchio, Italy and Skopje, Macedonia; $0.4 million for the relocation of certain Solid Capacitor manufacturing equipment in Victoria, Mexico; $0.4 million for the exit of Film & Electrolytic manufacturing from Suzhou, China; and $0.5 million for other costs related to shut-downs in Europe, North America, and Asia. Fiscal Year Ended March 31, 2015 The Company incurred $13.0 million in restructuring charges in the fiscal year ended March 31, 2015 including $10.3 million related to personnel reduction costs which is primarily comprised of the following: $4.1 million related to headcount reductions in Europe (primarily Landsberg, Germany) as the Company relocates production to lower cost regions; $3.2 million is related to a headcount reduction of 50 employees due to the consolidation of manufacturing facilities in Italy; $1.9 million related to the reduction of certain Solid Capacitor production workforce from Matamoros, Mexico to Victoria, Mexico; and $1.1 million related to headcount reductions taken as the Company begins to outsource its information technology function. In addition to these personnel reduction costs, the Company incurred manufacturing relocation costs of $2.7 million comprised of the following: $1.4 million for the exit of solid capacitors in Evora, Portugal and the relocation of certain Solid Capacitors manufacturing operations from Evora, Portugal to Victoria, Mexico; $0.4 million for the Landsberg, Germany shut-down including relocating equipment to Pontecchio, Italy; $0.3 million for the relocation of certain Film & Electrolytic lines from Monterrey, Mexico and Skopje, Macedonia to Suzhou China; and $0.5 million for other cost related to shut-downs in Europe and Asia. A reconciliation of the beginning and ending liability balances for restructuring charges included in the line items “Accrued expenses” and “Other non-current obligations” on the Consolidated Balance Sheets were as follows (amounts in thousands): Personnel Reductions Manufacturing and Sales Office Relocation Costs Balance at March 31, 2014 $ 6,217 $ — Costs charged to expense 10,345 2,672 Costs paid or settled (7,995 ) (2,672 ) Change in foreign exchange (1,328 ) — Balance at March 31, 2015 7,239 — Costs charged to expense 1,803 2,375 Costs paid or settled (8,273 ) (2,375 ) Change in foreign exchange 207 — Balance at March 31, 2016 976 — Costs charged to expense 2,214 3,190 Costs paid or settled (2,130 ) (2,784 ) Change in foreign exchange (61 ) — Balance at March 31, 2017 $ 999 $ 406

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The following table highlights the Company’s intangible assets (amounts in thousands): March 31, 2017 March 31, 2016 Carrying Amount Accumulated Amortization Carrying Amount Accumulated Amortization Indefinite Lived Intangible Assets: Trademarks $ 7,207 $ — $ 7,207 $ — Amortizing Intangibles: Purchased technology, customer relationships and patents (3 - 18 years) 39,527 16,953 43,089 16,995 $ 46,734 $ 16,953 $ 50,296 $ 16,995 For fiscal years ended March 31, 2017 , 2016 and 2015 amortization related to intangibles was $2.1 million , $2.2 million and $2.1 million , respectively. The weighted-average useful life of amortized intangibles was 16.6 years in the fiscal years ended March 31, 2017 and 2016 . The weighted-average period prior to the next renewal for patents was 0.5 years and 1.5 years in the fiscal years ended March 31, 2017 and March 31, 2016 , respectively. Estimated amortization of intangible assets for each of the next five fiscal years is $2.1 million and, thereafter, amortization will total $12.1 million . For fiscal year 2017 , the Company completed its impairment test on goodwill and intangible assets with indefinite useful lives as of January 1, 2017 and concluded that goodwill and indefinite-lived assets were not impaired. The changes in the carrying amount of goodwill for the years ended March 31, 2017 and 2016 are as follows (amounts in thousands): Fiscal Year 2017 Fiscal Year 2016 Solid Capacitors Film and Electrolytic Corporate (1) Solid Capacitors Film and Electrolytic Corporate (1) Gross balance at beginning of fiscal year Goodwill $ 35,584 $ 1,092 $ 4,710 $ 35,584 $ 1,092 $ — Accumulated impairment losses — (1,092 ) — — (1,092 ) — Net balance at the end of the year $ 35,584 $ — $ 4,710 $ 35,584 $ — $ — Acquisitions $ — $ — $ — $ — $ — $ 4,710 Impairment charges $ — $ — $ — $ — $ — $ — Balance at the end of the year Goodwill $ 35,584 $ 1,092 $ 4,710 $ 35,584 $ 1,092 $ 4,710 Accumulated impairment losses — (1,092 ) — — (1,092 ) — Balance at the end of the year, net $ 35,584 $ — $ 4,710 $ 35,584 $ — $ 4,710 (1) Corporate goodwill established as a result of the IntelliData acquisition on April 1, 2015.

Investment in NEC TOKIN

Investment in NEC TOKIN	12 Months Ended
	Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Investment in NEC TOKIN	Investment in TOKIN On March 12, 2012, KEC, a wholly owned subsidiary of the Company, entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with TOKIN and NEC Corporation (“NEC”) (together with its affiliate NEC Capital Solutions Limited, the sole shareholder of TOKIN) to acquire 51% of the common stock of TOKIN (which represented a 34% economic interest, as calculated based on the number of common shares held by KEC, directly and indirectly, in proportion to the aggregate number of outstanding common and convertible preferred shares of TOKIN as of such date) (the “Initial Purchase”). The transaction closed on February 1, 2013, at which time KEC paid a purchase price of $50.0 million for new shares of common stock of TOKIN (the “Initial Closing”). Through March 31, 2017, the Company accounted for its investment in TOKIN using the equity method for a non-consolidated variable interest entity since KEC did not have the power to direct significant activities of TOKIN. The Company believes that the TOKIN convertible preferred stock represents in-substance common stock of TOKIN and, as a result, its method of calculating KEC’s economic basis in TOKIN is the appropriate basis on which to recognize its share of the earnings or loss of TOKIN. In connection with KEC’s execution of the Stock Purchase Agreement, KEC entered into a Stockholders’ Agreement (the “Stockholders’ Agreement”) with TOKIN and NEC, which provided for restrictions on transfers of TOKIN’s capital stock, certain tag-along and first refusal rights on transfer, restrictions on NEC’s ability to convert the preferred stock of TOKIN held by it, certain management services provided to TOKIN by KEC (or an affiliate of KEC) and certain board representation rights. During fiscal year 2017, KEC held four of seven TOKIN director positions. However, NEC has significant board rights. Concurrent with the execution of the Stock Purchase Agreement and the Stockholders’ Agreement, KEC entered into an Option Agreement (the “Option Agreement”) with NEC, which was amended on August 29, 2014, whereby KEC had the right to purchase additional shares of TOKIN common stock from TOKIN for a purchase price of $50.0 million resulting in an economic interest of approximately 49% while maintaining ownership of 51% of TOKIN’s common stock (the “First Call Option”) by providing notice of the First Call Option between the Initial Closing and April 30, 2015. Upon providing such First Call Option notice, but not before April 1, 2015, KEC could also have exercised a second option to purchase all outstanding capital stock of TOKIN from its stockholders, primarily NEC, for a purchase price based on the greater of six times LTM EBITDA (as defined in the Option Agreement) less the previous payments and certain other adjustments, or the outstanding amount of TOKIN’s debt obligation to NEC (the “Second Call Option”) by providing notice of the Second Call Option by May 31, 2018. The First and Second Call Options expired on April 30, 2015 without being exercised. Under the Option Agreement, from April 1, 2015 through May 31, 2018, NEC could have required KEC to purchase all outstanding capital stock of TOKIN from its stockholders, primarily NEC (the “Put Option”), provided that KEC’s payment of the Put Option price was permitted under the 10.5% Senior Notes and Loan and Security Agreement.Subsequent to year-end, the Company completed its acquisition of the remaining 66% economic interest in TOKIN and TOKIN became a 100% owned subsidiary of KEMET. See Note 19 , “ Subsequent Events ” for additional information. The Put Option was canceled under the Definitive TOKIN Stock Purchase Agreement, herein defined, for acquisition of the remaining 66% of TOKIN. The Company has marked these options to fair value and in the fiscal years ended March 31, 2017 , 2016 and 2015 recognized a $10.7 million gain, $26.3 million loss, and $2.1 million gain respectively, which was included on the line item “Change in value of the TOKIN options” in the Consolidated Statement of Operations. The line item “Other non-current obligations” on the Consolidated Balance Sheets includes $9.9 million and $20.6 million as of March 31, 2017 and 2016 , respectively, related to the options. KEC’s total investment in TOKIN including the net call forward contract described above on February 1, 2013 was $54.5 million which includes $50.0 million cash consideration plus approximately $4.5 million in transaction expenses (fees for legal, accounting, due diligence, investment banking and other various services necessary to complete the transactions). The Company has made an allocation of the aggregate purchase price, which were based upon estimates that the Company believes are reasonable. Summarized financial information for TOKIN follows (in thousands): March 31, March 31, Current assets continuing operations $ 204,654 $ 199,527 Assets held for sale (current) (1) 118,983 43,146 Noncurrent assets continuing operations 285,952 188,925 Assets held for sale (noncurrent) (1) — 72,360 Current liabilities continuing operations 375,433 146,207 Liabilities held for sale (current) (1) 50,008 36,078 Noncurrent liabilities continuing operations 65,657 313,768 Liabilities held for sale (noncurrent) (1) — 21,720 (1) As discussed in Note 19 , “ Subsequent Events, ” TOKIN sold its EMD business on April 14, 2017. Fiscal Year March 31, 2017 Fiscal Year March 31, 2016 Fiscal Year March 31, 2015 Net sales $ 328,822 $ 301,898 $ 321,540 Gross profit 74,465 67,409 66,722 Net income (loss) from continuing operations 106,103 (54,575 ) (43,085 ) Net income (loss) from discontinued operations (1) 22,399 11,580 18,994 Net income (loss) 128,502 (42,995 ) (24,091 ) (1) As discussed in Note 19 , “ Subsequent Events, ” TOKIN sold its EMD business on April 14, 2017. A reconciliation between TOKIN’s net loss and KEMET’s equity investment income (loss) follows (in thousands): Fiscal Year March 31, 2017 Fiscal Year March 31, 2016 Fiscal Year March 31, 2015 TOKIN net income (loss) $ 128,502 $ (42,995 ) $ (24,091 ) KEMET’s equity ownership % 34 % 34 % 34 % Equity income (loss) from TOKIN before Adjustments $ 43,691 $ (14,618 ) $ (8,191 ) Adjustments: Amortization and depreciation (2,210 ) (1,625 ) (2,270 ) Indemnity asset — — 8,500 Inventory profit elimination 162 (163 ) (208 ) Equity income (loss) from TOKIN $ 41,643 $ (16,406 ) $ (2,169 ) A reconciliation between TOKIN’s net assets and KEMET’s equity investment balance follows (amounts in thousands): March 31, 2017 March 31, 2016 Investment in TOKIN $ 63,416 $ 20,334 Purchase price accounting basis adjustment: Property, plant and equipment (1) 3,080 3,365 Technology (1) (8,691 ) (10,134 ) Long-term debt (1) (1,067 ) (1,975 ) Goodwill (7,590 ) (7,555 ) Indemnity asset for legal investigation (8,500 ) (8,500 ) Inventory profit elimination (2) 208 371 Other (569 ) (603 ) KEMET’s 34% interest of TOKIN’s equity $ 40,287 $ (4,697 ) (1) Depreciated or amortized over the estimated lives. (2) Adjusted each period for any activity. As of March 31, 2017 , KEC’s maximum loss exposure as a result of its investments in TOKIN is limited to the aggregate of the carrying value of the investment, any accounts receivable balance due from TOKIN and obligations in the Put Option. Summarized transactions between KEC and TOKIN are as follows (amounts in thousands): Twelve Month Periods Ended 2017 2016 2015 KEC’s sales to TOKIN $ 17,100 $ 21,061 $ 13,500 TOKIN’s sales to KEMET 8,341 5,912 3,605 March 31, March 31, Accounts receivable $ 2,662 $ 5,220 Accounts payable 1,378 1,019 Management service agreement receivable (1) 775 748 (1) In accordance with the Stockholders’ Agreement, KEC entered into a management services agreement with TOKIN to provide services for which KEC is being reimbursed. Beginning in March 2014, TOKIN and certain of its subsidiaries received inquiries, requests for information and other communications from government authorities in China, the United States, the European Union, Japan, South Korea, Taiwan, Singapore and Brazil concerning alleged anti-competitive activities within the capacitor industry. On September 2, 2015, the United States Department of Justice announced a plea agreement with TOKIN in which TOKIN agreed to plead guilty to a one-count felony charge of unreasonable restraint of interstate and foreign trade and commerce in violation of Section 1 of the Sherman Act, and to pay a criminal fine of $13.8 million . The plea agreement was approved by the United States District Court, Northern District of California, on January 21, 2016. The fine is payable over 5 years in six installments of $2.3 million each, plus accrued interest. The first and second payments were made in February 2016 and January 2017, respectively, while the next payment is due in January 2018. On December 9, 2015, the Taiwan Fair Trade Commission (“TFTC”) publicly announced that TOKIN would be fined 1,218.2 million New Taiwan dollars (“NTD”) (approximately U.S. $40.2 million ) for violations of the Taiwan Fair Trade Act. Subsequently, the TFTC indicated the fine would be reduced to NTD609.1 million (approximately U.S. $20.1 million ). In February 2016, TOKIN commenced an administrative suit in Taiwan, challenging the validity of the amount of the fine. On March 29, 2016, the Japan Fair Trade Commission published an order by which TOKIN was fined ¥127.2 million (approximately U.S. $1.1 million ) for violation of the Japanese Antimonopoly Act. Payment of the fine was made in October 2016. On July 27, 2016, Brazil’s Administrative Council for Economic Defense approved a cease and desist agreement with TOKIN in which TOKIN made a financial contribution of Brazilian real 601 thousand (approximately U.S. $0.2 million ) to Brazil’s Fund for Defense of Diffuse Rights. On May 2, 2016, TOKIN reached a preliminary settlement, followed by definitive settlement agreements on July 15, 2016, in two antitrust suits pending in the United States District Court, Northern District of California as In re: Capacitors Antitrust Litigation , No. 3:14-cv-03264-JD (the “Class Action Suits”), which was approved by the court on April 6, 2017 (for the purported direct purchaser plaintiffs), or is subject to court approval (for the purported indirect purchaser plaintiffs). Pursuant to the terms of the settlement, in consideration of the release of TOKIN and its subsidiaries (including TOKIN America, Inc.) from claims asserted in the Class Action Suits, TOKIN will pay an aggregate $37.3 million to a settlement class of direct purchasers of capacitors and a settlement class of indirect purchasers of capacitors. Each of the respective class payments is payable in five installments, the first of which became due on July 29, 2016, the next three of which are due each year thereafter on the anniversary of the initial payment, and the final payment is due by December 31, 2019. TOKIN has paid the initial installment payments into the two plaintiff classes’ respective escrow accounts. Pursuant to the Stock Purchase Agreement, NEC is required to indemnify TOKIN and/or KEC for any breaches by TOKIN or NEC of certain representations, warranties and covenants in the Stock Purchase Agreement. NEC’s aggregate liability for indemnification claims is limited to $25.0 million . Accordingly, KEMET, under equity method accounting, has established an indemnity asset in the amount of $8.5 million (based upon our 34% economic interest in TOKIN). Under the Definitive TOKIN Stock Purchase Agreement, herein defined, for acquisition of the remaining 66% of TOKIN this indemnity was released, and as such in the first quarter of fiscal year 2018 the indemnity asset will be removed. In the fiscal year ended March 31, 2017 , KEMET incurred a loss of $7.1 million related to TOKIN’s antitrust and civil litigation, based upon its 34% economic interest in TOKIN, which is included in the line item “Equity income (loss) from TOKIN” on the Condensed Consolidated Statements of Operations. The remaining governmental investigations are continuing at various stages. As of March 31, 2017 , TOKIN’s accrual for antitrust and civil litigation totaled $83.4 million . This amount includes the best estimate of losses which may result from the ongoing antitrust investigations, civil litigation and claims. However, the actual outcomes could differ from what has been accrued. Additionally, under the terms of the TOKIN Purchase Agreement (as hereinafter defined), TOKIN will be responsible for defending all suits, paying all expenses and satisfying all judgments to the extent arising out of or related the capacitor antitrust investigations and related litigation described above.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Segment and Geographic Information	Segment and Geographic Information The Company is organized into two business groups: Solid Capacitors and Film and Electrolytic based primarily on product lines. Each business group is responsible for its respective manufacturing operations and research and development efforts. All research and development expenses are direct costs to the respective business group. Solid Capacitors Operating in nine manufacturing sites in the United States, Mexico and China as of March 31, 2017 , Solid Capacitors primarily produces tantalum, aluminum, polymer and ceramic capacitors which are sold globally. Solid Capacitors also produces tantalum powder used in the production of tantalum capacitors and has a product innovation center in the United States. Film and Electrolytic Film and Electrolytic operates nine manufacturing sites throughout Europe and Asia and produces film, paper, and electrolytic capacitors which are sold globally. In addition, the business group has product innovation centers in Italy, Portugal and Sweden. The following tables summarize information about each segment’s net sales, operating income (loss), depreciation and amortization, capital expenditures and total assets (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Net sales: Solid Capacitors $ 575,110 $ 556,303 $ 621,275 Film and Electrolytic 182,681 178,520 201,917 $ 757,791 $ 734,823 $ 823,192 Operating income (loss) (1)(2)(3): Solid Capacitors $ 146,694 $ 129,909 $ 135,946 Film and Electrolytic (8,278 ) (71 ) (16,685 ) Corporate (103,876 ) (97,512 ) (96,883 ) $ 34,540 $ 32,326 $ 22,378 Depreciation and amortization: Solid Capacitors $ 20,824 $ 21,318 $ 21,202 Film and Electrolytic 10,953 11,984 13,886 Corporate 5,561 5,714 5,680 $ 37,338 $ 39,016 $ 40,768 Capital expenditures: Solid Capacitors $ 12,300 $ 10,098 $ 12,552 Film and Electrolytic 7,955 5,902 7,752 Corporate 5,362 4,469 1,928 $ 25,617 $ 20,469 $ 22,232 _______________________________________________________________________________ (1) Restructuring charges included in Operating income (loss) were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Total restructuring: Solid Capacitors $ 1,333 $ 1,916 $ 3,297 Film and Electrolytic 3,738 1,714 8,221 Corporate 333 548 1,499 $ 5,404 $ 4,178 $ 13,017 (2) Impairment charges and write downs included in Operating income (loss) were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Impairment and write down of long-lived assets: Solid Capacitors $ 2,076 $ — $ — Film and Electrolytic 8,203 — — $ 10,279 $ — $ — (3) (Gain) loss on sales and disposals of assets included in Operating income (loss) were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 (Gain) loss on sales and disposals of assets: Solid Capacitors $ 227 $ 536 $ 606 Film and Electrolytic 136 (270 ) (1,008 ) Corporate 29 109 181 $ 392 $ 375 $ (221 ) _______________________________________________________________________________ March 31, 2017 2016 Total assets: Solid Capacitors $ 439,281 $ 424,659 Film and Electrolytic 204,407 234,822 Corporate 90,840 40,299 $ 734,528 $ 699,780 The following highlights net sales by geographic location (amounts in thousands): Fiscal Years Ended March 31,(1) 2017 2016 2015 United States $ 198,250 $ 201,878 $ 238,840 Hong Kong 121,813 133,117 131,109 Germany 104,755 83,589 107,859 Europe (2) 64,316 57,362 58,879 China 71,223 65,043 65,289 Asia Pacific (2) 54,767 61,414 62,864 United Kingdom 33,837 28,083 32,127 Netherlands 32,478 31,218 38,853 Singapore 15,565 16,260 22,516 Italy 15,376 14,391 19,013 Hungary 18,856 17,766 22,745 Mexico 22,424 23,041 21,164 Other Countries (2) 4,131 1,661 1,934 Total Non-United States $ 559,541 $ 532,945 $ 584,352 $ 757,791 $ 734,823 $ 823,192 _______________________________________________________________________________ (1) Revenues are attributed to countries or regions based on the location of the customer. Net Sales to one customer exceeded 10% of total net sales as follows: $104.4 million , $99.3 million and $124.4 million in fiscal years 2017 , 2016 and 2015 , respectively. Solid Capacitor net sales to one customer over 10% were $89.4 million , $85.3 million and $109.1 million in fiscal years 2017 , 2016 and 2015 , respectively. Film and Electrolytic net sales to one customer over 10% were $14.0 million and $15.3 million in fiscal years 2016 and 2015 , respectively; no single customer exceeded 10% of total Film and Electrolytic net sales in fiscal year 2017 . (2) No country included in this caption exceeded 3% of consolidated net sales for fiscal years 2017 , 2016 and 2015 . _______________________________________________________________________________ The following geographic information includes Property, plant and equipment, net, based on physical location (amounts in thousands): March 31, 2017 2016 United States $ 46,387 $ 54,658 Mexico 55,878 61,859 Italy 36,108 44,699 China 23,780 26,705 Portugal 21,637 23,449 Macedonia 12,339 14,131 Sweden 5,851 6,876 Other (1) 7,331 9,462 Total Non-United States $ 162,924 $ 187,181 $ 209,311 $ 241,839 (1) No country included in this caption exceeded 3% of consolidated Property, plant and equipment net for fiscal years 2017 , 2016 and 2015 .

Discontinued Operations

Discontinued Operations	12 Months Ended
	Mar. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations The Film and Electrolytic business group (“Film and Electrolytic”) completed the sale of its machinery division in April 2014, which resulted in a gain of $5.6 million on the sale of the business (after income tax expense) offset by a loss from machinery operations of $0.3 million during the fiscal year ended March 31, 2015 resulting in net income from discontinued operations of $5.4 million . Net sales and net operating loss from the Company’s discontinued operation for years ended March 31, 2017 , 2016 and 2015 were as follows (in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Net sales $ — $ — $ 104 Operating income (loss) — — (265 )

Acquisitions

Acquisitions	12 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions IntelliData On April 1, 2015, KEMET purchased 100% of the stock of IntelliData, Inc. “IntelliData,” a Greenwood Village, Colorado-based developer of digital solutions supporting discovery, decision support, and the sales and marketing of electronic components. IntelliData had been a key vendor of KEMET for over 15 years and had provided critical software and support to allow the Company’s sales team and customers to use real-time part number search and competitor cross references based on complex capacitor-specific specifications. The primary reason for the purchase of IntelliData was to gain more control over the direction of future iterations of the software and its functionality and to protect this critical link in the sales process from any potential unfavorable changes in IntelliData’s business model in the future. The purchase price was $6.0 million plus an additional $0.1 million per a post-acquisition amendment for a total purchase price of $6.1 million , as amended. KEMET paid $3.0 million at closing, $0.1 million on June 3, 2015, and $3.0 million on January 4, 2016 per the amended agreement. The Company recorded goodwill of $4.7 million and amortizable intangibles of $1.8 million . The allocation of the purchase price to specific assets and liabilities was based on the relative fair value of all assets and liabilities. Factors contributing to the purchase price, which resulted in the goodwill, include the knowledge and expertise of the trained workforce as well as various trademarks. Pro forma results are not presented as the acquisition was not material to the consolidated financial statements. The following table presents the allocations of the aggregate purchase price based on the estimated fair values of the assets and liabilities (amounts in thousands): Fair Value Cash $ 233 Accounts receivable 10 Other current assets 6 Property, plant and equipment 3 Goodwill 4,710 Intangible assets 1,820 Current liabilities (9 ) Deferred income taxes (648 ) Total net assets acquired $ 6,125 The following table presents the amounts assigned to intangible assets (amounts in thousands except useful life data): Fair Value Useful Life (years) Developed technology $ 1,820 10 The useful life of 10 years is based on IntelliData’s history with the first major iteration of the underlying technology, including its reliability, performance, and ongoing maintenance requirements. In determining the value of the developed technology, the Company considered any remaining value of the first major iteration of the technology as well as the value of the substantial development work that had already gone into the second major iteration of the technology as of the acquisition date. The second major iteration of the technology was successfully implemented in the third quarter of fiscal year 2017.

Impairment Charges

Impairment Charges	12 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Impairment Charges	Impairment Charges During fiscal year 2017 the Company incurred impairment charges of $10.3 million . During fiscal years 2016 and 2015 , the Company incurred no impairment charges. The impairment charges are recorded on the Consolidated Statements of Operations line item “Write down of long-lived assets” in fiscal year 2017 . In fiscal year 2017, Film and Electrolytic incurred impairment charges totaling $8.2 million ( $0.18 per basic share and $0.15 per diluted share). The impairment charges consisted of the following two actions. On August 31, 2016, KEMET Electronics Corporation, a wholly-owned subsidiary of KEMET made the decision to shut-down operations of its wholly-owned subsidiary, KFM. Operations at KFM’s Knoxville, Tennessee plant ceased as of October 31, 2016. KFM supplied formed foil to the Company’s Film and Electrolytic Business Group, as well as to certain third party customers. The Company anticipates that Film and Electrolytic will achieve raw material cost savings by purchasing its formed foil from suppliers that have the advantage of lower utility costs. The Company recorded impairment charges related to KFM totaling $4.1 million comprised of $3.0 million for the write down of property plant and equipment and $1.1 million for the write down of intangible assets. In addition, the Company has accrued severance charges and restructuring costs described in Note 3 , “Restructuring Charges.” The Company has also recorded impairment charges of $4.1 million related to a decline in real estate market conditions surrounding its vacated Sasso Marconi, Italy manufacturing facility. KEMET used a capitalization of income method to estimate fair value taking into account the surface area of the property, the lease price per unit of surface area, and a weighted average cost of capital. The measurements utilized to determine the fair value of the property represent inputs that are observable or can be corroborated by observable market data (Level 2) in accordance with the fair value hierarchy. Due to the operating loss incurred by Film and Electrolytic in the twelve-month period ending March 31, 2017 , we tested its long-lived assets for impairment as of March 31, 2017 and concluded that the long-lived assets for Film and Electrolytic were not impaired. In fiscal year 2017, Solid Capacitors incurred impairment charges totaling $2.1 million ( $0.04 per basic share and $0.04 per diluted share) related to the relocation of our leased K-salt facility to our existing Matamoros, Mexico facility. In addition, the Company has accrued severance charges described in Note 3 “Restructuring Charges” and has incurred equipment relocation costs of approximately $0.6 million during fiscal year 2017 and expects to incur an additional $0.7 million through June of 2017.

Pension and Other Post-retireme

Pension and Other Post-retirement Benefit Plans	12 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Pension and Other Post-retirement Benefit Plans	Pension and Other Post-retirement Benefit Plans The Company sponsors nine defined benefit pension plans: six in Europe, one in Singapore and two in Mexico. The Company funds the pension liabilities in accordance with laws and regulations applicable to those plans. In addition, the Company maintains two frozen post-retirement benefit plans: health care and life insurance benefits for certain retired United States employees who reached retirement age while working for the Company. The health care plan is contributory, with participants’ contributions adjusted annually. The life insurance plan is non-contributory. A summary of the changes in benefit obligations and plan assets is as follows (amounts in thousands): Pension Other Benefits 2017 2016 2017 2016 Change in Benefit Obligation Benefit obligation at beginning of the year $ 45,716 $ 49,342 $ 623 $ 846 Service cost 1,298 1,507 — — Interest cost 1,297 1,347 11 19 Plan participants’ contributions — — 592 464 Plan amendments — 342 — — Actuarial (gain) loss 1,980 (4,922 ) (228 ) (146 ) Foreign currency exchange rate change (3,732 ) 221 — — Gross benefits paid (1,120 ) (1,425 ) (612 ) (560 ) Curtailments and settlements (268 ) (696 ) — — Benefit obligation at end of year $ 45,171 $ 45,716 $ 386 $ 623 Change in Plan Assets Fair value of plan assets at beginning of year $ 10,268 $ 10,483 $ — $ — Actual return on plan assets 1,099 (46 ) — — Foreign currency exchange rate changes (1,361 ) (242 ) — — Employer contributions 1,176 1,528 20 96 Settlements (58 ) (30 ) — — Plan participants’ contributions — — 592 464 Gross benefits paid (1,120 ) (1,425 ) (612 ) (560 ) Fair value of plan assets at end of year $ 10,004 $ 10,268 $ — $ — Funded status at end of year Fair value of plan assets $ 10,004 $ 10,268 $ — $ — Benefit obligations (45,171 ) (45,716 ) (386 ) (623 ) Amount recognized at end of year $ (35,167 ) $ (35,448 ) $ (386 ) $ (623 ) In fiscal year 2016, the Company recognized a curtailment gain of $0.7 million due to headcount reductions in Landsberg, Germany corresponding with the relocation of production to lower cost regions. The Company expects to contribute $1.6 million to the pension plans in fiscal year 2018 , which includes direct contributions to be made for funded plans and benefit payments to be made for unfunded plans. The Company does not prefund its post-retirement health care and life insurance benefit plans. As a result, the Company is responsible annually for the payment of benefits as incurred by the plans. The Company anticipates making payments of $53 thousand during fiscal year 2018 . Amounts recognized in the Consolidated Balance Sheets consist of the following (amounts in thousands): Pension Other Benefits 2017 2016 2017 2016 Current liability $ (827 ) $ (833 ) $ (52 ) $ (82 ) Noncurrent liability (34,340 ) (34,615 ) (334 ) (541 ) Amount recognized, end of year $ (35,167 ) $ (35,448 ) $ (386 ) $ (623 ) Amounts recognized in Accumulated other comprehensive income (loss) consist of the following (amounts in thousands): Pension Other Benefits 2017 2016 2017 2016 Net actuarial loss (gain) $ 16,196 $ 15,585 $ (1,134 ) $ (1,114 ) Prior service cost 1,500 1,582 — — Accumulated other comprehensive (income) loss $ 17,696 $ 17,167 $ (1,134 ) $ (1,114 ) Although not reflected in the table above, the tax effect on the balances was $2.7 million and $2.0 million as of March 31, 2017 and 2016 , respectively. Components of benefit costs (credit) consist of the following (amounts in thousands): Pension Other Benefits 2017 2016 2015 2017 2016 2015 Net service cost $ 1,298 $ 1,507 $ 1,286 $ — $ — $ — Interest cost 1,297 1,347 1,819 11 19 29 Expected return on plan assets (346 ) (433 ) (499 ) — — — Amortization: Actuarial (gain) loss 419 704 277 (207 ) (191 ) (187 ) Prior service cost 82 60 17 — — — Recurring activity 2,750 3,185 2,900 (196 ) (172 ) (158 ) One time expense (income) (11 ) — — — — — Net periodic benefit cost (credit) $ 2,739 $ 3,185 $ 2,900 $ (196 ) $ (172 ) $ (158 ) The estimated amounts related to pensions that will be amortized from accumulated other comprehensive income into net periodic benefit costs in fiscal year 2018 are actuarial losses of $362 thousand , and prior service costs of $80 thousand . The estimated amounts related to other benefits that will be amortized from accumulated other comprehensive income into net periodic benefit costs in fiscal year 2018 are actuarial gains of $188 thousand . The asset allocation for the Company’s defined benefit pension plans at March 31, 2017 and the target allocation for 2017 , by asset category, are as follows: Asset Category Target Allocation (%) Plan Assets at March 31, 2017 (%) Insurance (1) 10 6 International equities 15 18 International bonds 60 63 Other 15 13 Total 100 100 _______________________________________________________________________________ (1) Comprised of assets held by the defined benefit pension plan in Germany. The Company’s investment strategy for its defined benefit pension plans is to maximize long-term rate of return on plan assets within an acceptable level of risk in order to minimize the cost of providing pension benefits. The investment policy establishes a target allocation range for each asset class and the fund is managed within those ranges. The plans use a number of investment approaches including insurance products, equity and fixed income funds in which the underlying securities are marketable in order to achieve this target allocation. Certain plans invest solely in insurance products. The Company continuously monitors the performance of the overall pension asset portfolio, asset allocation policies, and the performance of individual pension asset managers and makes adjustments and changes, as required. The Company does not manage any assets internally, does not have any passive investments in index funds, and does not directly utilize futures, options, or other derivative instruments or hedging strategies with regard to the pension plans; however, the investment mandate of some pension asset managers allows the use of the foregoing as components of their portfolio management strategies. The expected rate of return was determined by modeling the expected long-term rates of return for broad categories of investments held by the plan against a number of various potential economic scenarios. Other changes in plan assets and benefit obligations recognized in Accumulated other comprehensive income (loss) are as follows (amounts in thousands): Pension Other Benefits 2017 2016 2015 2017 2016 2015 Current year actuarial (gain) loss $ 1,229 $ (5,125 ) $ 12,397 $ (228 ) $ (146 ) $ 118 Amortization of actuarial gain (loss) (619 ) (698 ) (258 ) 208 191 187 Current year prior service cost — 342 1,006 — — — Amortization of prior service cost (82 ) (60 ) (17 ) — — — Total recognized in other comprehensive income $ 528 $ (5,541 ) $ 13,128 $ (20 ) $ 45 $ 305 Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 3,267 $ (2,356 ) $ 16,028 $ (216 ) $ (127 ) $ 147 Each of these changes has been factored into the following benefit payments schedule for the next ten fiscal years. The Company expects to have benefit payments in the future as follows (amounts in thousands): Expected benefit payments 2018 2019 2020 2021 2022 2021- 2025 Pension benefits $ 1,467 $ 1,562 $ 1,619 $ 1,584 $ 1,651 $ 11,090 Other benefits 53 50 47 43 39 140 Total $ 1,520 $ 1,612 $ 1,666 $ 1,627 $ 1,690 $ 11,230 The following weighted-average assumptions were used to determine the projected benefit obligation at the measurement date and the net periodic cost for the pension and post-retirement plan (amounts in thousands except percentages): Pension Other Benefits 2017 2016 2017 2016 Projected benefit obligation: Discount rate 3.1 % 3.2 % 3.2 % 2.8 % Rate of compensation increase 3.5 % 3.4 % — % — % Health care cost trend on covered charges — % — % 7.0% 7.0% Net periodic benefit cost: Discount rate 3.1 % 2.8 % 2.8 % 2.9 % Rate of compensation increase 3.5 % 3.5 % — % — % Expected return on plan assets 3.2 % 4.0 % — % — % Health care cost trend on covered charges — % — % 7.0% 7.0% Sensitivity of retiree welfare results Effect of a one percentage point increase in assumed health care cost trend: —On total service and interest costs components $ — $ — —On post-retirement benefits obligation — 6 Effect of a one percentage point decrease in assumed health care cost trend: —On total service and interest costs components — — —On post-retirement benefits obligation — (6 ) The measurement date used to determine pension and post-retirement benefits is March 31. The Company evaluated input from its third-party actuary to determine the appropriate discount rate. The determination of the discount rate is based on various factors such as the rate on bonds, term of the expected payouts, and long-term inflation factors. The following table sets forth by level, within the fair value hierarchy as described in Note 1, the pension plan’s assets, required to be carried at fair value on a recurring basis as of March 31, 2017 and March 31, 2016 (amounts in thousands): Fair Value March 31, 2017 Fair Value Measurement Using Fair Value March 31, 2016 Fair Value Measurement Using Level 1 Level 2 (1) Level 3 (2) Level 1 Level 2 Level 3 Cash and cash equivalents $ 86 $ 86 $ — $ — $ 129 $ 129 $ — $ — Equity securities: International equities 1,760 — 1,760 — 1,567 — 1,567 — Fixed income securities: International bonds 6,275 — 6,275 — 6,469 — 6,469 — Insurance contracts 580 — — 580 611 — — 611 Diversified growth funds 1,303 — 1,303 — 1,492 — 1,492 — $ 10,004 $ 86 $ 9,338 $ 580 $ 10,268 $ 129 $ 9,528 $ 611 (1) Level 2 plan assets consist of pooled investment funds which are unquoted and have no restriction on redemption. Fair value was determined using daily, weekly, or monthly trading activity which derives the unit price of the pooled fund. (2) Level 3 plan assets are invested in reinsurance contracts whose value is the sum of the actuarial reserve and the profit participation of each contract. The actuarial reserve is the sum of discounted cash flows associated with future benefits and premiums. The table below sets forth a summary of changes in the fair value of the defined benefit pension plan’s Level 3 assets for the fiscal years ended March 31, 2016 and March 31, 2017 (amounts in thousands): Balance at March 31, 2015 $ 576 Actual return on plan assets 14 Employer contributions 189 Benefits paid (202 ) Foreign currency exchange rate change 34 Balance at March 31, 2016 $ 611 Actual return on plan assets 20 Employer contributions 198 Benefits paid (211 ) Foreign currency exchange rate change (38 ) Balance at March 31, 2017 $ 580 The Company also sponsors a deferred compensation plan for highly compensated employees. The plan is non-qualified and allows certain employees to contribute to the plan. Company matches, net of gains (losses) related to the deferred compensation plan, were $176 thousand in fiscal year 2017 , $5 thousand in fiscal year 2016 , and $115 thousand in fiscal year 2015 . Total benefits accrued under this plan were $1.8 million and $1.5 million at March 31, 2017 and March 31, 2016 , respectively. In addition, the Company has a defined contribution retirement plan (the “Savings Plan”) in which all United States employees who meet certain eligibility requirements may participate. A participant may direct the Company to contribute amounts, based on a percentage of the participant’s compensation, to the Savings Plan through the execution of salary reduction agreements. In addition, the participants may elect to make after-tax contributions. The Company matches contributions to the Savings Plan up to 6% of the employee’s salary. The Company made matching contributions of $2.4 million , $2.1 million and $2.2 million in fiscal years 2017 , 2016 , and 2015 , respectively.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company’s stock-based compensation plans are broad-based, long-term retention programs intended to attract and retain talented employees and align stockholder and employee interests. The major components of stock-based compensation expense are as follows (amounts in thousands): Fiscal year ended Fiscal year ended Fiscal year ended Stock Options Restricted Stock LTIPs Stock Options Restricted Stock LTIPs Stock Options Restricted Stock LTIPs Cost of sales $ 21 $ 634 $ 729 $ 81 $ 617 $ 720 $ 233 $ 269 $ 1,075 Selling, general and administrative expenses 20 1,490 1,620 78 1,352 1,732 306 787 1,547 Research and development 1 26 179 4 23 167 13 3 279 $ 42 $ 2,150 $ 2,528 $ 163 $ 1,992 $ 2,619 $ 552 $ 1,059 $ 2,901 Employee Stock Options As of March 31, 2017, the 2014 Amendment and Restatement of the KEMET Corporation 2011 Omnibus Equity Incentive Plan (the “2011 Incentive Plan”), approved by the Company’s stockholders in 2014, is the only plan the Company has to issue equity based awards to executives and key employees. Upon adoption of the 2011 Incentive Plan, no further awards were permitted to be granted under the Company’s prior plans, including the 1992 Key Employee Stock Option Plan, the 1995 Executive Stock Option Plan, and the 2004 Long-Term Equity Incentive Plan (collectively, the “Prior Plans”). The 2011 Incentive Plan authorized the grant of up to 7.4 million shares of the Company’s Common Stock, comprised of 6.6 million shares under the 2011 Incentive Plan and 0.8 million shares remaining from the Prior Plans and authorizes the Company to provide equity-based compensation in the form of: • stock options, including incentive stock options, entitling the optionee to favorable tax treatment under Section 422 of the Code; • stock appreciation rights; • restricted stock and restricted stock units; • other share-based awards; and, • performance awards. Options issued under these plans vest within one to three years and expire ten years from the grant date. For the stock options granted to the Company’s Chief Executive Officer on January 27, 2010, 50% vested on June 30, 2014 and 50% vested on June 30, 2015. If available, the Company issues shares of Common Stock from treasury stock upon exercise of stock options and vesting of restricted stock units. The Company has no plans to purchase additional shares in conjunction with its employee stock option plans in the near future. Employee stock option activity for fiscal year 2017 is as follows: Options (in thousands) Weighted- Average Exercise Price Outstanding at March 31, 2016 1,254 $ 7.63 Granted — — Exercised (204 ) 5.55 Forfeited — — Expired (86 ) 16.72 Outstanding at March 31, 2017 964 7.27 Exercisable at March 31, 2017 964 $ 7.27 Remaining weighted average contractual life of options exercisable (years) 4.1 Remaining weighted average contractual life of options outstanding (years) 4.1 Amounts included in the following table are in thousands, except weighted average fair value and weighted average exercise price: Fiscal Years Ended 2017 2016 2015 Weighted average grant-date fair value of non-vested shares $ — $ 2.72 $ 2.73 Weighted average grant-date fair value of shares Granted — — — Vested 2.72 2.73 3.50 Forfeited 2.72 2.81 3.25 Total estimated fair value of shares vested 223 548 1,000 Intrinsic value Stock options exercised 890 — — Options outstanding 5,272 Options currently exercisable 5,272 Total unrecognized compensation cost, net of estimated forfeitures, non-vested options — Weighted-average period of recognition for unrecognized compensation cost (in years) N/A Weighted average exercise price of stock options expected to vest N/A All option plans provide that options to purchase shares be supported by the Company’s authorized but unissued common stock or treasury stock. All restricted stock and performance awards are also supported by the Company’s authorized but unissued common stock or treasury stock. The prices of the options granted pursuant to these plans are not less than 100% of the value of the shares on the date of the grant. Performance Vesting Stock Options During fiscal year 2006, the Company issued 166,667 performance awards with a weighted-average exercise price of $24.15 to the Chief Executive Officer which entitle him to receive shares of common stock if and when the stock price achieves and maintains certain thresholds. These awards are open ended until they vest and have a ten -year life after vesting or expire on the third year following retirement, whichever comes first. Effective March 4, 2010, 83,333 of these awards were voluntarily relinquished and no concurrent grant, replacement award or other valuable consideration was provided. Restricted Stock Units (“RSU’s”) Restricted stock unit activity for fiscal year 2017 is as follows (amounts in thousands except fair value): Shares Weighted- average Fair Value on Grant Date Non-vested restricted stock at March 31, 2016 1,430 $ 3.51 Granted 386 4.91 Vested (409 ) 3.18 Forfeited (25 ) 3.39 Non-vested restricted stock at March 31, 2017 1,382 $ 4.00 The Company grants RSU’s to members of the Board of Directors, the Chief Executive Officer and a limited group of executives. In fiscal year 2017 , RSU’s granted to the Board of Directors vest in one year and RSU’s granted to certain officers and under the key manager stock program vest over 3 years . Once vested, RSU’s are converted into restricted shares of common stock, except for RSU’s granted to members of the Board of Directors, who can elect to defer settlement of the RSU’s to a later date. Restricted shares cannot be sold until 90 days after the Chief Executive Officer, executive, key manager, or member of the Board of Directors, as applicable, resigns from his or her position, or until the KEMET employee achieves the targeted ownership under the Company’s stock ownership guidelines, and only to the extent that such ownership exceeds the target. As of March 31, 2017 and 2016 , unrecognized compensation costs related to the unvested restricted stock share based compensation arrangements granted were $2.7 million and $3.0 million , respectively. The expense is being recognized over the respective vesting periods. Long-term Incentive Plans (“LTIP”) Historically the Board of Directors of the Company has approved annual Long Term Incentive Plans which cover a two year performance period. A portion of the LTIPs awarded restricted stock units which vest over the course of three years from the anniversary of the establishment of the plan and a portion of the award is based upon the achievement of an Adjusted EBITDA range for the two -year period. At the time of the award, the individual plans entitle the participants to receive cash or restricted stock units, or a combination of both. The Company assesses the likelihood of meeting the Adjusted EBITDA financial metric on a quarterly basis and adjusts compensation expense to match expectations. Any related liability (for the cash portion of the LTIP) is reflected in the line item “Accrued expenses” on the Consolidated Balance Sheets and any restricted stock commitment is reflected in the line item “Additional paid-in capital” on the Consolidated Balance Sheets. The following is the performance-based vesting schedule of RSU under each respective LTIP, subject to the respective participant’s continued employment with KEMET (shares in thousands): 2017/2018 (1) 2016/2017 2015/2016 2014/2015 Performance-based award vested fiscal year 2017 — — 103 73 Potential performance-based award vesting fiscal year 2018 (2) — 171 102 — Potential performance-based award vesting fiscal year 2019 (2) — 171 — — (1) The performance portion of the 2017/2018 LTIP is payable in cash. (2) Potential performance-based award assuming the higher range is achieved. The following is the time-based vesting schedule of RSU under each respective LTIP, subject to the respective participant’s continued employment with KEMET (shares in thousands): 2017/2018 2016/2017 2015/2016 2014/2015 Time-based award vested fiscal year 2017 — 187 111 130 Time-based award vesting fiscal year 2018 198 186 113 — Time-based award vesting fiscal year 2019 198 191 — — Time-based award vesting fiscal year 2020 204 — — — In the Operating activities section of the Consolidated Statements of Cash Flows, stock-based compensation expense was treated as an adjustment to net income (loss) for fiscal years 2017 , 2016 and 2015 .

Income Taxes

Income Taxes	12 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of Income (loss) from continuing operations before income taxes and equity loss from TOKIN are as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Domestic (U.S.) $ 653 $ (38,581 ) $ (26,238 ) Foreign (Outside U.S.) 9,983 7,364 14,112 Total $ 10,636 $ (31,217 ) $ (12,126 ) The provision (benefit) for Income tax expense is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Current: Federal $ — $ — $ — State and local 62 95 (92 ) Foreign 4,247 5,416 7,403 Total current income tax expense from continuing operations 4,309 5,511 7,311 Deferred: Federal (6 ) (647 ) 270 State and local (97 ) 172 39 Foreign 84 970 (2,393 ) Deferred tax expense (benefit) from continuing operations (19 ) 495 (2,084 ) Provision for income taxes $ 4,290 $ 6,006 $ 5,227 The Company realized a deferred tax expense (benefit) for fiscal years ended 2017 , 2016 and 2015 of $1.2 million , $1.4 million and $(2.1) million , respectively, in certain foreign jurisdictions based on changes in judgment about the realizability of deferred tax assets in future years. Differences between the provision for income taxes on earnings from continuing operations and the amount computed using the U.S. Federal statutory income tax rate are as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Amount computed using the statutory rate of 35% $ 3,722 $ (10,926 ) $ (4,245 ) Change in U.S. valuation allowance (7,080 ) 4,099 (19,691 ) Unremitted earnings of foreign subsidiaries 2,127 (231 ) 18,502 Effect of prior year adjustments (1) 1,789 (286 ) 5,766 Expired foreign tax credits 4,766 — — Effect of business combination — (648 ) — Taxable foreign source income 1,835 2,415 4,660 (Put)/call option valuation impact (3,745 ) 7,381 — Other non-deductible expenses (937 ) 126 217 State income taxes, net of federal taxes (35 ) 267 (53 ) Change in foreign operations tax exposure reserves 108 998 1,119 Change in foreign tax law 144 981 — Change in foreign operations valuation allowance (2) 983 (200 ) 1,378 Other effect of foreign operations 613 2,030 (2,426 ) Provision for income taxes $ 4,290 $ 6,006 $ 5,227 (1) The effect of prior year adjustments is offset by a full valuation allowance resulting in no impact on the provision for income taxes. (2) The change in foreign operations valuation allowance excludes other comprehensive income and currency translation adjustments of $0.9 million , $0.6 million , and $(3.4) million for fiscal years ended 2017 , 2016 and 2015 , respectively which has no impact on the provision for income taxes. The foreign jurisdictions having the greatest effect on the provision for income taxes are China and Mexico. The statutory tax rates for China and Mexico are 25% and 30% , respectively. The combined provision for income taxes for China and Mexico for fiscal years ended 2017 , 2016 and 2015 is $3.1 million , $3.2 million , and $6.4 million , respectively. The components of deferred tax assets and liabilities are as follows (amounts in thousands): March 31, 2017 2016 Deferred tax assets: Net operating loss carry forwards $ 165,161 $ 173,041 Sales allowances and inventory reserves 14,910 16,918 Medical and employee benefits 16,336 11,234 Tax credits 4,954 9,840 Stock-based compensation 2,501 2,576 Other 2,357 2,988 Total deferred tax assets before valuation allowance 206,219 216,597 Less valuation allowance (163,898 ) (170,917 ) Total deferred tax assets 42,321 45,680 Deferred tax liabilities: Unremitted earnings of subsidiaries (20,265 ) (18,271 ) Depreciation and differences in basis (7,576 ) (11,718 ) Amortization of intangibles and debt discounts (6,207 ) (7,107 ) Non-amortized intangibles (2,549 ) (2,556 ) Other (501 ) (451 ) Total deferred tax liabilities (37,098 ) (40,103 ) Net deferred tax assets $ 5,223 $ 5,577 The following table presents the annual activities included in the deferred tax valuation allowance (amounts in thousands): Valuation Allowance for Deferred Tax Assets Balance at March 31, 2014 $ 189,276 Charge to costs and expenses (19,900 ) Deductions (1,782 ) Balance at March 31, 2015 167,594 Charge to costs and expenses 4,072 Deductions (749 ) Balance at March 31, 2016 170,917 Charge to costs and expenses (2,094 ) Deductions (4,925 ) Balance at March 31, 2017 $ 163,898 In fiscal year 2017 , the valuation allowance decreased $7.0 million , of which $4.8 million relates to the expiration of foreign tax credit carryovers that were held by the U.S. Group and a $1.2 million decrease related to the investment in TOKIN. In fiscal year 2016 , the valuation allowance increased $3.3 million primarily due to the reversal of the deferred tax liability related to the NT Options offset by the increase in federal net operating loss carryforwards. In fiscal year 2015 , the valuation allowance decreased $21.7 million primarily from the recognition of a deferred tax liability for unremitted earnings of the Company's foreign subsidiaries and other adjustments relating to prior years, and from currency translation adjustments. Deductions in fiscal years 2017 , 2016 and 2015 resulted primarily from expiring net operating loss carryforwards and expiring tax credits in certain U.S. state and foreign jurisdictions. The change in net deferred income tax asset (liability) for the current year is presented below (amounts in thousands): Balance at March 31, 2016 $ 5,577 Deferred income taxes related to continuing operations 19 Deferred income taxes related to other comprehensive income 181 Foreign currency translation (554 ) Balance at March 31, 2017 $ 5,223 As of March 31, 2017 and 2016 , the Company’s gross deferred tax assets are reduced by a valuation allowance of $163.9 million and $170.9 million , respectively. A valuation allowance on U.S. deferred tax assets was determined to be necessary based on the existence of significant negative evidence such as a cumulative three -year loss of the U.S. consolidated group. The amount of future income required for the Company to realize its deferred tax assets is $29.8 million . In assessing the realizability of deferred tax assets in foreign jurisdictions, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that the Company will realize the benefits of these deductible differences, net of the existing valuation allowances as of March 31, 2017 . However, the amount of deferred tax assets considered realizable could be reduced in the near term if estimates of future taxable income during the carryforward period are reduced. As of March 31, 2017 , the Company had U.S. federal net operating loss carryforwards of $399.9 million . These U.S. federal net operating losses were incurred from 2004 through 2016 and are available to offset future federal taxable income, if any, through 2036. The Company had state net operating losses of $515.8 million , of which $5.2 million will expire in one year if unused. These state net operating losses are available to offset future state taxable income, if any, through 2037. Foreign subsidiaries, primarily in Finland, Italy, Portugal and Sweden had net operating loss carryforwards totaling $48.6 million , of which $4.8 million will expire within one year if unused. The net operating losses in Portugal and Finland are available to offset future taxable income through 2027 and 2019, respectively. The net operating losses in Italy and Sweden are available indefinitely to offset future taxable income. For the U.S. federal and state jurisdictions there is a greater likelihood of not realizing the future tax benefits of these deferred tax assets, and accordingly, the Company has recorded valuation allowances related to the net deferred tax assets in these jurisdictions. For the foreign jurisdictions with net operating loss carryforwards, a valuation allowance has been recorded where the Company does not expect to fully realize the deferred tax assets in the future. Utilization of the Company’s net operating loss carryforwards may be subject to substantial annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended (the “Code”) and similar state provisions. Such an annual limitation could result in the expiration of the net operating loss and tax credit carryforwards before utilization. The issuance of the Platinum Warrant may have given rise to an “ownership change” for purposes of Section 382 of the Code. If such an ownership change were deemed to have occurred, the amount of our taxable income that could be offset by the Company’s net operating loss carryovers in taxable years after the ownership change would be severely limited. While the Company believes that the issuance of the Platinum Warrant did not result in an ownership change for purposes of Section 382 of the Code, there is no assurance that the Company’s view will be unchallenged. Blue Powder was acquired which has substantial federal net operating losses that will now be limited due to the ownership change which occurred. At March 31, 2017 , the U.S. consolidated group of companies had the following tax credit carryforwards available (amounts in thousands): Tax Credits ($) Fiscal Year of Expiration U.S. foreign tax credits $ 407 2018 U.S. research credits 1,425 2023 Texas franchise tax credits 3,122 2026 The Company conducts business in Macedonia through a subsidiary that qualifies for a tax holiday. The tax holiday will terminate on January 1, 2023. For calendar years 2015 , 2016 , and 2017 , the statutory rate of 10% was reduced to zero. For the fiscal year ended March 31, 2017 the Company realized no income tax benefit from the tax holiday. At March 31, 2017 , the Company makes no assertion that unremitted earnings from subsidiaries outside the United States are indefinitely reinvested. This assertion changed during fiscal year 2015 based on an analysis of cash needs in the U.S. related to a planned acquisition and current debt funding. Due to the valuation allowance in the U.S., this assertion did not result in a cash tax impact. The Company has recognized a deferred tax liability relating to its investments in subsidiaries outside the United States. At March 31, 2017 , the Company had $7.4 million of unrecognized tax benefits. A reconciliation of gross unrecognized tax benefits (excluding interest and penalties) is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Beginning of fiscal year $ 7,103 $ 6,377 $ 5,691 Additions for tax positions of the current year 762 763 1,115 Reductions for tax positions of prior years (64 ) — (56 ) Lapse in statute of limitations (411 ) (10 ) (203 ) Settlements — (27 ) (170 ) End of fiscal year $ 7,390 $ 7,103 $ 6,377 At March 31, 2017 , $2.7 million of the $7.4 million of unrecognized income tax benefits would affect the Company’s effective income tax rate, if recognized. It is reasonably possible that the total unrecognized tax benefit could decrease by $2.3 million in fiscal year 2018 if the advanced pricing arrangement for one of the Company’s foreign subsidiaries is agreed to by the foreign tax authority. The Company files income tax returns in the U.S. and multiple foreign jurisdictions, including various state and local jurisdictions. The U.S. Internal Revenue Service concluded its examinations of the Company’s U.S. federal tax returns for all tax years through 2003. Because of net operating losses, the Company’s U.S. federal returns for 2003 and later years will remain subject to examination until the losses are utilized. The Company is subject to income tax examinations for the years 2008 and forward in Mexico and Portugal; and 2010 and forward in China and Italy. The Company records potential interest and penalty expenses related to unrecognized income tax benefits within its global operations in income tax expense. The Company had $0.2 million and $0.4 million of accrued interest and penalties respectively at March 31, 2017 and 2016 , which is included as a component of income tax expense. To the extent interest and penalties are not assessed with respect to uncertain tax positions, amounts accrued will be reduced and reflected as a reduction of the overall income tax provision.

Derivatives

Derivatives	12 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives In fiscal year 2015, the Company began using certain derivative instruments (i.e., foreign exchange contracts) to reduce exposures to the volatility of foreign currencies impacting revenues and the costs of its products. Certain operating expenses at the Company’s Mexican facilities are paid in Mexican Pesos. In order to hedge a portion of these forecasted cash flows, the Company purchases foreign exchange contracts, with terms generally less than twelve months, to buy Mexican Pesos for periods and amounts consistent with underlying cash flow exposures. These contracts are designated as cash flow hedges at inception and monitored for effectiveness on a routine basis. There were $49.1 million and $37.7 million in Peso contracts (notional value) outstanding at March 31, 2017 and 2016, respectively. Certain expenditures at the Company’s Mexican facilities are paid in Japanese Yen. In order to hedge a portion of these forecasted cash flows, the Company purchases foreign exchange contracts, with terms generally less than six months, to buy Japanese Yen for periods and amounts consistent with underlying cash flow exposures. These contracts are designated as cash flow hedges at inception and monitored for effectiveness on a routine basis. There were no Yen contracts outstanding at March 31, 2017 or 2016 , as the Yen hedge program has ended. Certain sales are made in Euros. In order to hedge a portion of these forecasted cash flows, management purchased foreign exchange contracts, with terms generally less than six months, to sell Euros for periods and amounts consistent with the related underlying cash flow exposures. These contracts were designated hedges at inception and monitored for effectiveness on a routine basis. There were no Euro contracts outstanding at March 31, 2017 or 2016 , as the Euro hedge program has ended. The Company formally documents all relationships between hedging instruments and hedged items, as well as risk management objectives and strategies for undertaking various hedge transactions. The Company records and presents the fair values of all of its derivative assets and liabilities in the Consolidated Balance Sheets on a net basis, since they are subject to master netting agreements. However, if the Company were to offset and record the asset and liability balances of its forward foreign currency exchange contracts on a gross basis, the amounts presented in the Consolidated Balance Sheets would be adjusted from the current net presentation to the gross amounts as detailed in the following table. The balance sheet classifications and fair value of derivative instruments as of March 31, 2017 and 2016 are as follows (amounts in thousands): Fair Value of Derivative Instruments March 31, 2017 March 31, 2016 Balance Sheet Presentation As Presented (1) Offset Gross As Presented (1) Offset Gross Prepaid and other current assets $ 2,907 $ 40 $ 2,947 $ — $ 523 $ 523 Accrued expenses — (40 ) (40 ) (367 ) (523 ) (890 ) $ 2,907 $ — $ 2,907 $ (367 ) $ — $ (367 ) ______________________________________________________________________________ (1) Fair Value measured using Level 2 inputs by adjusting the market spot rate by forward points, based on the date of the contract. The spot rates and forward points used are based on an average rate from an actively traded market. The impact on the Consolidated Statement of Operations for the twelve month periods ended March 31, 2017 and 2016 is as follows (amounts in thousands): Impact of Foreign Exchange Contracts on Condensed Consolidated Statement of Operations Twelve Month Periods Ended March 31, Statement Caption 2017 2016 Net Sales $ — $ (789 ) Operating costs and expenses: Cost of sales 5,170 3,199 Total operating costs and expenses 5,170 3,199 Operating income (loss) $ (5,170 ) $ (3,988 ) There was no impact on the Consolidated Statement of Operations for the twelve month period ended March 31, 2015 as the program was initiated in the fourth quarter of fiscal year 2015 . Unrealized gains and losses associated with the change in value of these financial instruments are recorded in AOCI. Changes in the derivatives’ fair values are deferred and recorded as a component of AOCI until the underlying transaction is settled and recorded to the income statement. When the hedged item affects income, gains or losses are reclassified from AOCI to the Consolidated Statement of Operations as Net sales for foreign exchange contracts to sell Euros, and as Cost of sales for foreign exchange contracts to purchase Mexican Pesos and Japanese Yen. Any ineffectiveness, if material, in the Company’s hedging relationships is recognized immediately as a loss, within the same income statement accounts as described above; to date, there has been no ineffectiveness. Changes in derivative balances impact the line items “Prepaid and other assets” and “Accrued Expenses” on the Consolidated Balance Sheets and Statements of Cash Flows.

Supplemental Balance Sheets and

Supplemental Balance Sheets and Statements of Operations Detail	12 Months Ended
	Mar. 31, 2017
Disclosure Text Block Supplement [Abstract]
Supplemental Balance Sheets and Statements of Operations Detail	Supplemental Balance Sheets and Statements of Operations Detail March 31, (amounts in thousands) 2017 2016 Accounts receivable: Trade $ 112,940 $ 116,146 Allowance for doubtful accounts reserve (942 ) (1,002 ) Ship-from-stock and debit reserve (15,489 ) (17,362 ) Returns reserves (2,913 ) (3,324 ) Rebates reserves (564 ) (872 ) Price protection reserves (506 ) (418 ) Accounts receivable, net $ 92,526 $ 93,168 The Company has agreements with distributors and certain other customers that, under certain conditions, allow for returns of overstocked inventory, provide protection against price reductions initiated by the Company and grant other sales allowances. Allowances for these commitments are included in the Consolidated Balance Sheets as reductions in trade accounts receivable. The Company adjusts sales based on historical experience. The following table presents the annual activities included in the allowance for these commitments (amounts in thousands): Balance at March 31, 2014 $ 24,660 Cost charged to expense 91,091 Actual adjustments applied (90,909 ) Other (195 ) Balance at March 31, 2015 24,647 Cost charged to expense 95,212 Actual adjustments applied (96,932 ) Other 51 Balance at March 31, 2016 22,978 Cost charged to expense 87,317 Actual adjustments applied (89,762 ) Other (119 ) Balance at March 31, 2017 $ 20,414 March 31, (amounts in thousands) 2017 2016 Inventories: Raw materials and supplies $ 65,750 $ 80,289 Work in process 47,408 46,631 Finished goods 50,738 58,060 Inventory gross 163,896 184,980 Inventory reserves (15,941 ) (16,101 ) Inventory, net $ 147,955 $ 168,879 The following table presents the annual activities included in the inventory reserves (amounts in thousands): Balance at March 31, 2014 $ 26,826 Costs charged to expense 9,291 Write-offs (17,520 ) Other (1,098 ) Balance at March 31, 2015 17,499 Costs charged to expense 5,696 Write-offs (7,326 ) Other 232 Balance at March 31, 2016 16,101 Costs charged to expense 6,163 Write-offs (6,125 ) Other (198 ) Balance at March 31, 2017 $ 15,941 Useful life (years) March 31, (amounts in thousands, except years) 2017 2016 Property, plant and equipment: Land and land improvements 20 $ 21,642 $ 22,380 Buildings 20 - 40 140,895 148,805 Machinery and equipment 10 783,288 793,250 Furniture and fixtures 4 - 10 68,706 69,442 Construction in progress 14,653 21,197 Other 1,403 2,103 Total property and equipment 1,030,587 1,057,177 Accumulated depreciation (821,276 ) (815,338 ) Property, plant and equipment, net $ 209,311 $ 241,839 March 31, (amounts in thousands) 2017 2016 Accrued expenses: Salaries, wages, and related employee costs $ 29,589 $ 20,708 Interest 15,603 15,683 Restructuring 984 946 Vacation 7,524 7,892 Other 4,052 5,091 Total accrued expenses $ 57,752 $ 50,320 March 31, (amounts in thousands) 2017 2016 Other non-current obligations: Pension plans $ 34,674 $ 35,156 Employee separation liability 8,685 9,352 Deferred compensation 1,774 1,544 Long-term obligation on land purchase 898 1,349 Restructuring 15 30 TOKIN option valuation 9,900 20,600 Long-term service contracts 339 2,343 Other 3,846 4,518 Total other non-current obligations $ 60,131 $ 74,892 Fiscal Years Ended March 31, (amounts in thousands) 2017 2016 2015 Non-operating (income) expense, net: Net foreign exchange (gains) losses $ (3,758 ) $ (3,036 ) $ (4,249 ) Insurance proceeds (423 ) — — Gain on early extinguishment of debt — — (1,003 ) Offering memorandum fees — — 1,142 Other (946 ) 688 28 Total non-operating (income) expense, net $ (5,127 ) $ (2,348 ) $ (4,082 )

Income_Loss Per Share

Income/Loss Per Share	12 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Income/Loss Per Share	Income/Loss Per Share Basic earnings per share calculation is based on the weighted-average number of common shares outstanding. Diluted earnings per share calculation is based on the weighted-average number of common shares outstanding adjusted by the number of additional shares that would have been outstanding had the potentially dilutive common shares been issued. Potentially dilutive shares of common stock include stock options and Platinum Warrant. The following table presents the basic and diluted weighted-average number of shares of common stock (amounts in thousands, except per share data): Fiscal Years Ended March 31, 2017 2016 2015 Numerator Income (loss) from continuing operations $ 47,989 $ (53,629 ) $ (19,522 ) Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively — — 5,379 Net income (loss) $ 47,989 $ (53,629 ) $ (14,143 ) Denominator: Weighted-average common shares outstanding: Basic 46,552 46,004 45,381 Assumed conversion of employee stock grants 2,235 — — Assumed conversion of Platinum Warrant 6,602 — — Weighted-average shares outstanding (diluted) 55,389 46,004 45,381 Net income (loss) per basic share: Income (loss) from continuing operations $ 1.03 $ (1.17 ) $ (0.43 ) Income (loss) from discontinued operations, net of income tax expense (benefit) $ — $ — $ 0.12 Net income (loss) $ 1.03 $ (1.17 ) $ (0.31 ) Net income (loss) per diluted share: Income (loss) from continuing operations $ 0.87 $ (1.17 ) $ (0.43 ) Income (loss) from discontinued operations, net of income tax expense (benefit) $ — $ — $ 0.12 Net income (loss) $ 0.87 $ (1.17 ) $ (0.31 ) Common stock equivalents that could potentially dilute net income per basic share in the future, but were not included in the computation of diluted earnings per share because the impact would have been antidilutive, were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Assumed conversion of employee stock grants 771 3,329 1,783 Assumed conversion of Platinum Warrant — 4,951 6,287

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company’s leases are primarily for distribution facilities or sales offices that expire principally between 2017 and 2023. A number of leases require the Company to pay certain executory costs (taxes, insurance, and maintenance) and contain certain renewal and purchase options. Annual rental expenses for operating leases were included in results of operations and were $6.7 million , $7.1 million and $7.6 million in fiscal years 2017 , 2016 , and 2015 , respectively. Future minimum lease payments over the next five fiscal years and thereafter under non-cancellable operating leases at March 31, 2017 , are as follows (amounts in thousands): Fiscal Years Ended March 31, 2018 2019 2020 2021 2022 Thereafter Minimum lease payments $ 5,980 $ 4,236 $ 1,954 $ 862 $ 475 $ 585 The Company or its subsidiaries are at any one time parties to a number of lawsuits arising out of their respective operations, including workers’ compensation or work place safety cases, some of which involve claims of substantial damages. Although there can be no assurance, based upon information known to the Company, the Company does not believe that any liability which might result from an adverse determination of such lawsuits would have a material adverse effect on the Company’s financial condition or results of operations.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Mar. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) The following table sets forth certain quarterly information for fiscal years 2017 and 2016 . This information, in the opinion of the Company’s management, reflects all adjustments (consisting only of normal recurring adjustments) necessary to present fairly this information when read in conjunction with the consolidated financial statements and notes thereto included elsewhere herein (amounts in thousands except per share data): Fiscal Year 2017 Quarters Ended Jun-30 Sep-30 Dec-31 Mar-31 Net sales $ 184,935 $ 187,308 $ 188,029 $ 197,519 Operating income (loss) (1) 8,898 3,050 13,850 8,742 Net income (loss) (12,205 ) (4,998 ) 12,278 52,914 Net income (loss) per basic share $ (0.26 ) $ (0.11 ) $ 0.26 $ 1.13 Net income (loss) per diluted share $ (0.26 ) $ (0.11 ) $ 0.22 $ 0.93 Fiscal Year 2016 Quarters Ended Jun-30 Sep-30 Dec-31 Mar-31 Net sales $ 187,590 $ 186,123 $ 177,184 $ 183,926 Operating income (loss) (1) 1,243 13,987 8,493 8,603 Net income (loss) (37,050 ) 7,194 (8,600 ) (15,173 ) Net income (loss) per basic share $ (0.81 ) $ 0.16 $ (0.19 ) $ (0.33 ) Net income (loss) per diluted share $ (0.80 ) $ 0.14 $ (0.19 ) $ (0.32 ) _______________________________________________________________________________ (1) Operating income (loss) as a percentage of net sales fluctuates from quarter to quarter due to a number of factors, including net sales fluctuations, foreign currency exchange, restructuring charges, product mix, the timing and expense of moving product lines to lower-cost locations, the write-down of long lived assets, the net gain/loss on sales and disposals of assets and the relative mix of sales among distributors, original equipment manufacturers, and electronic manufacturing service providers.

Condensed Consolidating Financi

Condensed Consolidating Financial Statements	12 Months Ended
	Mar. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Statements	Condensed Consolidating Financial Statements As discussed in Note 2, “Debt” , the Company’s 10.5% Senior Notes are fully and unconditionally guaranteed, jointly and severally, on a senior basis by certain of the Company’s 100% owned domestic subsidiaries (“Guarantor Subsidiaries”) and secured by a first priority lien on 51% of the capital stock of certain of the Company’s foreign restricted subsidiaries (“Non-Guarantor Subsidiaries”). The Company’s Guarantor Subsidiaries are not consistent with the Company’s business groups or geographic operations; accordingly, this basis of presentation is not intended to present the Company’s financial condition, results of operations or cash flows for any purpose other than to comply with the specific requirements for subsidiary guarantor reporting. We are required to present condensed consolidating financial information in order for the Guarantor Subsidiaries of the Company’s public debt to be exempt from reporting under the Securities Exchange Act of 1934, as amended. Condensed consolidating financial statements for the Company’s Guarantor Subsidiaries and Non-Guarantor Subsidiaries are presented in the following tables (amounts in thousands): Condensed Consolidating Balance Sheet March 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ 2,072 $ 72,705 $ 34,997 $ — $ 109,774 Accounts receivable, net — 30,265 62,261 — 92,526 Intercompany receivable 33,613 215,183 170,837 (419,633 ) — Inventories, net — 97,761 50,194 — 147,955 Prepaid expenses and other 3,325 14,460 13,938 (2,964 ) 28,759 Total current assets 39,010 430,374 332,227 (422,597 ) 379,014 Property and equipment, net 481 81,818 127,012 — 209,311 Investments in TOKIN — 63,416 — — 63,416 Investments in subsidiaries 473,147 421,577 93,359 (988,083 ) — Goodwill — 40,294 — — 40,294 Intangible assets, net — 24,665 5,116 — 29,781 Deferred income taxes — 896 7,697 — 8,593 Other assets — 3,543 576 — 4,119 Long-term intercompany receivable 63,385 38,902 1,089 (103,376 ) — Total assets $ 576,023 $ 1,105,485 $ 567,076 $ (1,514,056 ) $ 734,528 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities: Current portion of long-term debt $ — $ — $ 2,000 $ — $ 2,000 Accounts payable, trade 3 34,790 34,881 — 69,674 Intercompany payable 50,051 294,940 74,642 (419,633 ) — Accrued expenses 18,822 19,552 19,378 — 57,752 Income taxes payable — 2,997 682 (2,964 ) 715 Total current liabilities 68,876 352,279 131,583 (422,597 ) 130,141 Long-term debt, less current portion 352,472 31,881 1,858 — 386,211 Other non-current obligations — 13,151 46,980 — 60,131 Deferred income taxes — 2,236 1,134 — 3,370 Long-term intercompany payable — 63,385 39,991 (103,376 ) — Stockholders’ equity 154,675 642,553 345,530 (988,083 ) 154,675 Total liabilities and stockholders’ equity $ 576,023 $ 1,105,485 $ 567,076 $ (1,514,056 ) $ 734,528 Condensed Consolidating Balance Sheet March 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ 640 $ 36,209 $ 28,155 $ — $ 65,004 Accounts receivable, net — 41,025 52,143 — 93,168 Intercompany receivable 30,210 132,523 170,224 (332,957 ) — Inventories, net — 113,289 55,590 — 168,879 Prepaid expenses and other 3,325 12,161 12,974 (2,964 ) 25,496 Total current assets 34,175 335,207 319,086 (335,921 ) 352,547 Property and equipment, net 255 93,936 147,648 — 241,839 Investment in TOKIN — 20,334 — — 20,334 Investment in subsidiaries 382,108 429,723 93,359 (905,190 ) — Goodwill — 40,294 — — 40,294 Intangible assets, net — 27,252 6,049 — 33,301 Deferred income taxes — 800 7,597 — 8,397 Other assets — 2,452 616 — 3,068 Long-term intercompany receivable 67,500 41,428 1,088 (110,016 ) — Total assets $ 484,038 $ 991,426 $ 575,443 $ (1,351,127 ) $ 699,780 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities: Current portion of long-term debt $ 2,000 $ — $ — $ — $ 2,000 Accounts payable, trade 20 34,618 36,343 — 70,981 Intercompany payable 280 275,498 57,179 (332,957 ) — Accrued expenses 17,305 11,807 21,208 — 50,320 Income taxes payable — 2,983 434 (2,964 ) 453 Total current liabilities 19,605 324,906 115,164 (335,921 ) 123,754 Long-term debt, less current portion 351,952 19,881 14,000 — 385,833 Other non-current obligations — 25,797 49,095 — 74,892 Deferred income taxes — 2,242 578 — 2,820 Long-term intercompany payable — 67,500 42,516 (110,016 ) — Stockholders’ equity 112,481 551,100 354,090 (905,190 ) 112,481 Total liabilities and stockholders’ equity $ 484,038 $ 991,426 $ 575,443 $ (1,351,127 ) $ 699,780 Condensed Consolidating Statements of Operations Fiscal Year Ended March 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Net sales $ — $ 860,428 $ 711,262 $ (813,899 ) $ 757,791 Operating costs and expenses: Cost of sales 1,607 683,103 646,401 (759,432 ) 571,679 Selling, general and administrative expenses 44,447 74,093 43,795 (54,467 ) 107,868 Research and development 323 18,073 9,233 — 27,629 Restructuring charges — 3,901 1,503 — 5,404 Write down of long-lived assets — 4,586 5,693 — 10,279 Net (gain) loss on sales and disposals of assets (299 ) 1,405 (714 ) — 392 Total operating costs and expenses 46,078 785,161 705,911 (813,899 ) 723,251 Operating income (loss) (46,078 ) 75,267 5,351 — 34,540 Other (income) expense: Interest income — 3 (27 ) — (24 ) Interest expense 37,606 1,587 562 — 39,755 Change in value of TOKIN options — (10,700 ) — — (10,700 ) Non-operating (income) expense, net (40,487 ) 40,527 (5,167 ) — (5,127 ) Equity in earnings of subsidiaries (91,186 ) — — 91,186 — Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN 47,989 43,850 9,983 (91,186 ) 10,636 Income tax expense (benefit) — (65 ) 4,355 — 4,290 Income (loss) from continuing operations before equity income (loss) from TOKIN 47,989 43,915 5,628 (91,186 ) 6,346 Equity income (loss) from TOKIN — 41,643 — — 41,643 Net income (loss) $ 47,989 $ 85,558 $ 5,628 $ (91,186 ) $ 47,989 Condensed Consolidating Statements of Comprehensive Income (Loss) Fiscal Year Ended March 31, 2017 Other comprehensive income (loss) $ 43,875 $ 91,453 $ (6,540 ) $ (91,186 ) $ 37,602 Condensed Consolidating Statements of Operations Fiscal Year Ended March 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Net sales $ — $ 866,163 $ 703,690 $ (835,030 ) $ 734,823 Operating costs and expenses: Cost of sales 1,194 708,143 642,362 (780,156 ) 571,543 Selling, general and administrative expenses 38,071 74,521 43,728 (54,874 ) 101,446 Research and development 79 17,313 7,563 — 24,955 Restructuring charges — 2,564 1,614 — 4,178 Net (gain) loss on sales and disposals of assets (7 ) (484 ) 866 — 375 Total operating costs and expenses 39,337 802,057 696,133 (835,030 ) 702,497 Operating income (loss) (39,337 ) 64,106 7,557 — 32,326 Other (income) expense: Interest income — — (14 ) — (14 ) Interest expense 37,856 1,189 560 — 39,605 Change in value of TOKIN options — 26,300 — — 26,300 Non-operating (income) expense, net (36,183 ) 34,188 (353 ) — (2,348 ) Equity in earnings of subsidiaries 12,619 — — (12,619 ) — Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN (53,629 ) 2,429 7,364 12,619 (31,217 ) Income tax expense (benefit) — (269 ) 6,275 — 6,006 Income (loss) from continuing operations before equity income (loss) from TOKIN (53,629 ) 2,698 1,089 12,619 (37,223 ) Equity income (loss) from TOKIN — (16,406 ) — — (16,406 ) Net income (loss) $ (53,629 ) $ (13,708 ) $ 1,089 $ 12,619 $ (53,629 ) Condensed Consolidating Statements of Comprehensive Income (Loss) Fiscal Year Ended March 31, 2016 Comprehensive income (loss) $ (49,918 ) $ (24,832 ) $ 5,873 $ 12,619 $ (56,258 ) Condensed Consolidating Statements of Operations Fiscal Year Ended March 31, 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Net sales $ 195 $ 978,705 $ 773,504 $ (929,212 ) $ 823,192 Operating costs and expenses: Cost of sales 2,468 823,429 707,493 (869,707 ) 663,683 Selling, general and administrative expenses 41,783 70,074 46,181 (59,505 ) 98,533 Research and development 436 17,588 7,778 — 25,802 Restructuring charges — 3,310 9,707 — 13,017 Net (gain) loss on sales and disposals of assets (10 ) 181 (392 ) — (221 ) Total operating costs and expenses 44,677 914,582 770,767 (929,212 ) 800,814 Operating income (loss) (44,482 ) 64,123 2,737 — 22,378 Other (income) expense: — Interest income — — (15 ) — (15 ) Interest expense 38,632 998 1,071 — 40,701 Change in value of TOKIN options — (2,100 ) — — (2,100 ) Other (income) expense, net (40,903 ) 49,069 (12,248 ) — (4,082 ) Equity in earnings of subsidiaries (27,998 ) — — 27,998 — Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN (14,213 ) 16,156 13,929 (27,998 ) (12,126 ) Income tax expense (benefit) (70 ) 576 4,721 — 5,227 Income (loss) from continuing operations before equity income (loss) from TOKIN (14,143 ) 15,580 9,208 (27,998 ) (17,353 ) Equity income (loss) from TOKIN — (2,169 ) — — (2,169 ) Income (loss) from continuing operations (14,143 ) 13,411 9,208 (27,998 ) (19,522 ) Income (loss) from discontinued operations — 102 5,277 — 5,379 Net income (loss) $ (14,143 ) $ 13,513 $ 14,485 $ (27,998 ) $ (14,143 ) Condensed Consolidating Statements of Comprehensive Income (Loss) Fiscal Year Ended March 31, 2015 Comprehensive income (loss) $ (32,103 ) $ 19,650 $ (20,672 ) $ (27,998 ) $ (61,123 ) Condensed Consolidating Statements of Cash Flows Fiscal Year Ended March 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Sources (uses) of cash and cash equivalents Net cash provided by (used in) operating activities $ 3,313 $ 34,778 $ 33,576 $ — $ 71,667 Investing activities: Capital expenditures — (10,295 ) (15,322 ) — (25,617 ) Change in restricted cash — — — — — Proceeds from sale of assets — 13 6 — 19 Acquisitions, net of cash received — — — — — Net cash provided by (used in) investing activities — (10,282 ) (15,316 ) — (25,598 ) Financing activities: Proceeds from revolving line of credit — 12,000 — — 12,000 Payments of revolving line of credit — — (12,000 ) — (12,000 ) Deferred acquisition payments — — — — — Proceeds from long-term debt — — 2,314 — 2,314 Payments of long-term debt (1,870 ) — (558 ) — (2,428 ) Proceeds from exercise of stock options 1,133 — — — 1,133 Purchase of treasury stock (1,144 ) — — — (1,144 ) Net cash provided by (used in) financing activities (1,881 ) 12,000 (10,244 ) — (125 ) Net increase (decrease) in cash and cash equivalents 1,432 36,496 8,016 — 45,944 Effect of foreign currency fluctuations on cash — — (1,174 ) — (1,174 ) Cash and cash equivalents at beginning of fiscal year 640 36,209 28,155 — 65,004 Cash and cash equivalents at end of fiscal year $ 2,072 $ 72,705 $ 34,997 $ — $ 109,774 Condensed Consolidating Statements of Cash Flows Fiscal Year Ended March 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Sources (uses) of cash and cash equivalents Net cash provided by (used in) operating activities $ 3,722 $ 15,107 $ 13,536 $ — $ 32,365 Investing activities: Capital expenditures — (9,550 ) (10,919 ) — (20,469 ) Change in restricted cash — 1,802 — — 1,802 Proceeds from sale of assets — 248 723 — 971 Acquisitions, net of cash received — (2,892 ) — — (2,892 ) Net cash provided by (used in) investing activities — (10,392 ) (10,196 ) — (20,588 ) Financing activities: Proceeds from revolving line of credit — 8,000 2,000 — 10,000 Payments on revolving line of credit — (9,600 ) — — (9,600 ) Deferred acquisition payments (3,000 ) — — — (3,000 ) Payments of long-term debt — — (481 ) — (481 ) Purchase of treasury stock (722 ) — — — (722 ) Net cash provided by (used in) financing activities (3,722 ) (1,600 ) 1,519 — (3,803 ) Net increase (decrease) in cash and cash equivalents — 3,115 4,859 — 7,974 Effect of foreign currency fluctuations on cash — — 668 — 668 Cash and cash equivalents at beginning of fiscal year 640 33,094 22,628 — 56,362 Cash and cash equivalents at end of fiscal year $ 640 $ 36,209 $ 28,155 $ — $ 65,004 Condensed Consolidating Statements of Cash Flows Fiscal Year Ended March 31, 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Sources (uses) of cash and cash equivalents Net cash provided by (used in) operating activities $ 39,575 $ (4,085 ) $ (11,088 ) $ — $ 24,402 Investing activities: Capital expenditures — (12,930 ) (9,302 ) — (22,232 ) Change in restricted cash — 11,509 — — 11,509 Proceeds from sale of assets — 2,403 2,385 — 4,788 Proceeds from sale of discontinued operations — — 9,564 — 9,564 Net cash provided by (used in) investing activities — 982 2,647 — 3,629 Financing activities: Proceeds from revolving line of credit — 37,340 5,000 — 42,340 Payments on revolving line of credit — (22,342 ) (5,000 ) — (27,342 ) Deferred acquisition payments (18,527 ) (1,000 ) — — (19,527 ) Payments of long-term debt (20,417 ) — (1,316 ) — (21,733 ) Proceeds from exercise of stock options 24 — — — 24 Purchase of treasury stock (630 ) — — — (630 ) Net cash provided by (used in) financing activities (39,550 ) 13,998 (1,316 ) — (26,868 ) Net increase (decrease) in cash and cash equivalents 25 10,895 (9,757 ) — 1,163 Effect of foreign currency fluctuations on cash (1 ) (1 ) (2,728 ) — (2,730 ) Cash and cash equivalents at beginning of fiscal year 616 22,200 35,113 — 57,929 Cash and cash equivalents at end of fiscal year $ 640 $ 33,094 $ 22,628 $ — $ 56,362

Subsequent Events (Notes)

Subsequent Events (Notes)	12 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events TOKIN As described in Note 5 , “ Investment in NEC TOKIN ,” since 2013, KEMET, through its wholly-owned subsidiary, KEC, has held a 34% economic interest in TOKIN, which was operated as a joint venture with NEC Corporation. Subsequent to year-end, on April 19, 2017, KEC completed its acquisition of the remaining 66% economic interest in TOKIN it did not previously own. TOKIN is a manufacturer of tantalum capacitors, electro-magnetic and access devices and is headquartered in Tokyo, Japan. TOKIN has manufacturing locations in Japan, Thailand, Taiwan, Vietnam and China. Subsequent to closing, NEC TOKIN Corporation changed its name to TOKIN Corporation and became a 100% owned indirect subsidiary of KEMET. The acquisition was made possible in part by the sale of TOKIN's electro-mechanical devices (“EMD”) business as described below. Under the terms of the Definitive TOKIN Stock Purchase Agreement (the “TOKIN Purchase Agreement”) between KEC and NEC, dated as of February 23, 2017. KEC paid NEC JPY 16.2 billion , or approximately $148.8 million (using the April 19, 2017 exchange rate of 108.751 Japanese Yen to 1.00 U.S. Dollar), for all of the outstanding shares of TOKIN it did not already own. The preliminary purchase price was comprised of JPY 6.0 billion , or approximately $55.2 million (using the April 19, 2017 exchange rate of 108.751 Japanese Yen to 1.00 U.S. Dollar) plus one-half of an amount determined to be the excess net cash proceeds (“Excess Cash” as defined in the Agreement) from the sale of TOKIN’s EMD business discussed below. The Excess Cash is subject to working capital adjustments pursuant to the Master Sale Agreement. The acquisition of TOKIN will expand KEMET’s geographic presence, combining KEMET’s presence in the western hemisphere and TOKIN’s excellent position in Asia to enhance customer reach and create an entrance into Japan for KEMET. TOKIN’s product portfolio is a strong complement to KEMET’s existing product portfolio. We believe that the combination creates a leader in the combined polymer and tantalum Capacitors market. The acquisition also enhances KEMET’s product diversification with entry into EMC and sensors. Due to the timing of the close of the TOKIN acquisition, the Company did not have sufficient time to complete the valuation of the acquired assets and assumed liabilities, and therefore, the purchase price allocation cannot be determined at this time. Sale of EMD On April 14, 2017, KEMET announced that TOKIN closed on the sale of its electro-mechanical devices (“EMD”) business to NTJ Holdings 1 Ltd. (“NTJ”), pursuant to a master sale and purchase agreement (the “Master Sale Agreement”). EMD manufactures signal and power relays and is primarily located in Calamba, Laguna, Philippines. The selling price was JPY 49.6 billion or approximately $442.7 million (using the April 14, 2017 exchange rate of 108.874 Japanese Yen to 1.00 U.S. Dollar) and is subject to certain working capital adjustments pursuant to the Master Sale Agreement. The Master Sale Agreement was amended on April 7, 2017 and April 14, 2017 to adjust the closing date and adjust the net proceeds by JPY 99 million . In the first quarter of fiscal year 2018, TOKIN will recognize a gain on the sale of its EMD business. The following gain calculation is based upon preliminary estimates of the sales price (prior to working capital adjustments as outlined in the Master Sale Agreement), carrying amount of the EMD net assets, the tax impact of the transaction and transaction fees. KEMET's proportionate share of TOKIN's gain on the sale of the EMD business is calculated as follows: Oku-Yen $USD (in millions)* Sales price ¥ 495.8 $ 443.4 Less: Carrying amount of EMD net assets 77.1 69.0 Remove AOCI 5.2 4.6 Transaction related fees and taxes 6.8 6.1 Deferred tax asset 13.8 123.1 Gain on sale 392.9 240.6 KEMET's equity interest 34 % 34 % KEMET's gain on sale (1) ¥ 133.6 $ 81.8 *Utilizing an exchange rate as of March 31, 2017 of 111.82 Japanese Yen to 1.00 U.S. Dollar. Long-term debt On April 28, 2017, KEMET entered into a Term Loan Credit Agreement (the “Term Loan Credit Agreement”) by and among the Company, KEC (together with the Company, the “Borrowers”), Bank of America, N.A. as the Administrative Agent and Collateral Agent, Merrill Lynch, Pierce, Fenner & Smith Incorporated, as sole lead arranger and bookrunner and various other lenders thereto from time to time. The Term Loan Credit Agreement provides for a $345 million term loan facility. In addition, the Borrowers may request incremental term loan commitments in an aggregate amount not to exceed $50 million (together with the initial $345 million term loan, the “Term Loans”). The proceeds are being used, together with cash on hand, to fund the redemption of all of KEMET’s outstanding 10.5% Senior Notes, which were also called for redemption on April 28, 2017. The Term Loans were sold at 97 (with an original issue discount of 300 bps). At the Company’s election, the Term Loans may be made as either Base Rate Term Loans or LIBO Rate Term Loans (each as defined in the Term Loan Credit Agreement). The applicable margin for term loans is 5.0% for Base Rate Term Loans and 6.0% for LIBO Rate Term Loans. All LIBO Rate Term Loans are subject to a pre-margin floor of 1.00% . The Term Loan Credit Agreement contains customary covenants and events of default. The Company also entered into the Term Loan Security Agreement dated as of April 28, 2017 (the “Security Agreement”), among the Company, KEC and certain other subsidiaries of the Company, the other grantors party thereto, and Bank of America, N.A., as collateral agent, pursuant to which the Company’s obligations under the Term Loan Credit Agreement are secured by a pledge of 65% of the outstanding voting stock of certain first-tier subsidiaries organized in Italy, Japan, Mexico and Singapore, and a second lien pledge on the collateral securing KEMET’s revolving credit facility. The obligations of the Company under the Term Loan Credit Agreement are guaranteed by certain of its subsidiaries, including KRC Trade Corporation, KEMET Services Corporation, KEMET Blue Powder Corporation and The Forest Electric Company. The Term Loans mature April 28, 2024, and may be extended in accordance with the Term Loan Credit Agreement. The Company may prepay loans under the Term Loan Credit Agreement at any time, subject to certain notice requirements and certain prepayment premiums during the first two years. On a quarterly basis the Company must repay 1.25% of the aggregate principle amount of all initial term loans, or $4.3 million , beginning September 29, 2017. In connection with the closing of the new Term Loan Credit Agreement, KEC also entered into Amendment No. 9 to Loan and Security Agreement, Waiver and Consent, dated as of April 28, 2017, by and among KEC, the other borrowers named therein, the financial institutions party thereto as lenders and Bank of America, N.A., as agent for the lenders (the “Loan Amendment”). The Loan Amendment increases the facility amount to $75 million and provides KEC with lower applicable interest rate margins and the ability to complete the refinancing. As part of the overall refinancing, KEC also repaid all amounts outstanding under the Loan Amendment.

Organization and Significant 27

Organization and Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Organization	Nature of Business and Organization KEMET Corporation, which together with its subsidiaries is referred to herein as “KEMET” or the “Company” is a leading manufacturer of tantalum capacitors, multilayer ceramic capacitors, film capacitors, electrolytic capacitors, paper capacitors and solid aluminum capacitors. The Company is headquartered in Simpsonville, South Carolina, which is part of the greater Greenville metropolitan area, and has manufacturing plants and distribution centers located in the United States, Mexico, Europe and Asia. Additionally, the Company has wholly-owned foreign subsidiaries which primarily provide sales support for KEMET’s products in foreign markets. KEMET is organized into two business groups: the Solid Capacitor Business Group (“Solid Capacitors”) and the Film and Electrolytic Business Group (“Film and Electrolytic”). Each business group is responsible for the operations of certain manufacturing sites as well as related research and development efforts.
Basis of Presentation	Basis of Presentation Certain amounts for the condensed consolidating balance sheet for fiscal year 2016 have been revised to conform with the fiscal year 2017 presentation.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements of the Company include the accounts of its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Investment in entities in which the Company can exercise significant influence, but does not own a majority equity interest or otherwise control, are accounted for using the equity method and are included as investments in equity interests on the consolidated balance sheets.
Cash Equivalents	Cash Equivalents Cash equivalents of $2.1 million and $0.7 million at March 31, 2017 and 2016 , respectively, consist of money market accounts with an original term of three months or less. The Company considers all liquid debt instruments with original maturities of three months or less to be cash equivalents.
Inventories	Inventories Inventories are stated at the lower of cost or market. The carrying value of inventory is reviewed and adjusted based on slow moving and obsolete items, historical shipments, customer forecasts and backlog and technology developments. Inventory costs include material, labor and manufacturing overhead and most inventory costs are determined by the “first-in, first-out” (“FIFO”) method. For tool crib, a component of the Company’s raw material inventory, cost is determined under the average cost method. The Company has consigned inventory at certain customer locations totaling $8.8 million and $8.5 million at March 31, 2017 and 2016 , respectively.
Property and Equipment	Inventories are stated at the lower of cost or market. The carrying value of inventory is reviewed and adjusted based on slow moving and obsolete items, historical shipments, customer forecasts and backlog and technology developments. Inventory costs include material, labor and manufacturing overhead and most inventory costs are determined by the “first-in, first-out” (“FIFO”) method. For tool crib, a component of the Company’s raw material inventory, cost is determined under the average cost method. The Company has consigned inventory at certain customer locations totaling $8.8 million and $8.5 million at March 31, 2017 and 2016 , respectively. Property, Plant and Equipment Property and equipment are carried at cost. Depreciation is calculated principally using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the assets or the terms of the respective leases. Maintenance costs are expensed; expenditures for renewals and improvements are generally capitalized. Upon sale or retirement of property and equipment, the related cost and accumulated depreciation are removed and any gain or loss is recognized. A long-lived asset classified as held for sale is initially measured and reported at the lower of its carrying amount or fair value less cost to sell. Long-lived assets to be disposed of other than by sale are classified as held and used until the long-lived asset is disposed of. Depreciation expense, including amortization of capital leases, was $35.0 million , $36.9 million and $38.7 million for the fiscal years ended March 31, 2017 , 2016 and 2015 , respectively. The Company evaluates long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Reviews are regularly performed to determine whether facts and circumstances exist which indicate the carrying amount of assets may not be recoverable. The Company assesses the recoverability of its assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. If it is determined that the book value of a long-lived asset or asset group is not recoverable, an impairment loss would be calculated equal to the excess of the carrying amount of the long-lived asset over its fair value. The fair value is calculated as the discounted cash flows of the underlying assets or appraisal values. The Company has to make certain assumptions as to the future cash flows to be generated by the underlying assets. Those assumptions include the amount of volume increases, average selling price decreases, anticipated cost reductions, and the estimated remaining useful life of the equipment. Future changes in assumptions may negat
Goodwill	Goodwill and Other Intangible Assets Goodwill and other intangible assets with indefinite useful lives are not amortized but are subject to annual impairment tests during the fourth quarter of each fiscal year and when otherwise warranted. The Company evaluates its goodwill on a reporting unit basis which requires the Company to estimate the fair value of the reporting units based on the future net cash flows expected to be generated. The impairment test involves a comparison of the fair value of each reporting unit, with the corresponding carrying amounts. If the reporting unit’s carrying amount exceeds its fair value, then an indication exists that the reporting unit’s goodwill and intangible asset with indefinite useful lives may be impaired. The impairment to be recognized is measured by the amount by which the carrying value of the reporting unit’s goodwill being measured exceeds its implied fair value. The implied fair value of goodwill is the excess of the fair value of the reporting unit over the sum of the amounts assigned to identified net assets. As a result, the implied fair value of goodwill is generally the residual amount that results from subtracting the value of net assets including all tangible assets and identified intangible assets from the fair value of the reporting unit’s fair value. The Company determined the fair value of its reporting units using an income-based, discounted cash flow (“DCF”) analysis, and market-based approaches (Guideline Publicly Traded Company Method and Guideline Transaction Method) which examine transactions in the marketplace involving the sale of the stocks of similar publicly owned companies, or the sale of entire companies engaged in operations similar to KEMET. The Company evaluates the value of its other indefinite-lived intangible assets (trademarks) using an income-based, relief from royalty analysis. In addition to the previously described reporting unit valuation techniques, the Company’s goodwill and intangible assets with indefinite useful lives impairment assessment also considers the Company’s aggregate fair value based upon the value of the Company’s outstanding shares of common stock. The impairment review of goodwill and intangible assets with indefinite useful lives are subjective and involve the use of estimates and assumptions in order to calculate the impairment charges. Estimates of business enterprise fair value use discounted cash flow and other fair value appraisal models and involve making assumptions for future sales trends, market conditions, growth rates, cost reduction initiatives and cash flows for the next several years. Future changes in assumptions may negatively impact future valuations.
Equity Method Investment	Equity Method Investment Investments and ownership interests are accounted for under the equity method of accounting if the Company has the ability to exercise significant influence, but not control, over the entity. Investments accounted for under the equity method are initially recorded at cost, and the difference between the basis of the Company’s investment and the underlying equity in the net assets of the company at the investment date, is amortized over the lives of the related assets that gave rise to the difference. The Company’s share of earnings or losses under the equity method investments and basis difference amortization is reported in the consolidated statements of operations as “Equity income (loss) from TOKIN.” The Company reviews its investments and ownership interests accounted for under the equity method of accounting for impairment whenever events or changes in circumstances indicate a loss in the value of the investment may be other than temporary.
Deferred Income Taxes	Deferred Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in fiscal years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets unless it is more likely than not that such assets will be realized.
Stock-based Compensation	Stock-based Compensation Stock-based compensation for stock options is estimated on the date of grant using the Black-Scholes option-pricing model. The Black-Scholes model takes into account volatility in the price of the Company’s stock, the risk-free interest rate, the estimated life of the equity-based award, the closing market price of the Company’s stock on the grant date and the exercise price. The estimates utilized in the Black-Scholes calculation involve inherent uncertainties and the application of management judgment. In addition, the Company is required to estimate the expected forfeiture rate and only recognize expense for those options expected to vest. Stock-based compensation cost for restricted stock is measured based on the closing fair market value of the Company’s common stock on the date of grant. The Company recognizes stock-based compensation cost for arrangements with cliff vesting as expense ratably on a straight-line basis over the requisite service period. The Company recognizes stock-based compensation cost for arrangements with graded vesting as expense on an accelerated basis over the requisite service period.
Concentrations of Credit and Other Risks	Concentrations of Credit and Other Risks The Company sells to customers globally. Credit evaluations of its customers’ financial condition are performed periodically, and the Company generally does not require collateral from its customers. One customer, TTI, Inc., an electronics distributor, accounted for $104.4 million , $99.3 million and $124.4 million of the Company’s net sales in fiscal years ended March 31, 2017 , 2016 , and 2015 , respectively. There were no customers’ accounts receivable balances exceeding 10% of gross accounts receivable at March 31, 2017 or March 31, 2016 . Consistent with industry practice, the Company utilizes electronics distributors for a large percentage of its sales. Electronics distributors are an effective means to distribute the products to end-users. For fiscal years ended March 31, 2017 , 2016 , and 2015 , net sales to electronics distributors accounted for 46% , 42% and 45% , respectively, of the Company’s total net sales.
Foreign Subsidiaries	Foreign Subsidiaries Financial statements of certain of the Company’s foreign subsidiaries are prepared using the U.S. dollar as their functional currency. Translation of these foreign operations, as well as gains and losses from non-U.S. dollar foreign currency transactions, such as those resulting from the settlement of foreign receivables or payables, are reported in the Consolidated Statements of Operations. Translation of other foreign operations to U.S. dollars occurs using the current exchange rate for balance sheet accounts and an average exchange rate for results of operations. Such translation gains or losses are recognized as a component of equity in accumulated other comprehensive income (“AOCI”).
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) consists of net income (loss), currency translation gains (losses), defined benefit plan adjustments including those adjustments which result from changes in net prior service credit and actuarial gains (losses), equity interest in investee’s other comprehensive income (loss), and gains (losses) on derivatives held as cash flow hedges, and is presented in the Consolidated Statements of Comprehensive Income (Loss).
Warrant Liability	Stock Warrant Concurrent with the consummation of a credit facility in May 2009, the Company issued K Financing, LLC (“K Financing”) a warrant (the “Platinum Warrant”) to purchase up to 26,848,484 shares of the Company’s common stock, subject to certain adjustments, representing approximately 49.9% of the Company’s outstanding common stock at the time of issuance on a post-exercise basis. The Platinum Warrant was subsequently transferred to K Equity, LLC (“K Equity”). The Platinum Warrant is exercisable at a purchase price of $1.05 per share. The Platinum Warrant may be exercised in exchange for cash, by means of net settlement of a corresponding portion of amounts owed by the Company under the Revised Amended and Restated Platinum Credit Facility, by cashless exercise to the extent of appreciation in the value of the Company’s common stock above the exercise price of the Platinum Warrant, or by combination of the preceding alternatives. Warrants may be classified as assets or liabilities (derivative accounting), temporary equity, or permanent equity, depending on the terms of the specific warrant agreement. The Platinum Warrant issued to K Financing under the Platinum Credit Facility (as defined below) does not meet the definition of a derivative as it is indexed to the Company’s own stock, as such, the Platinum Warrant is classified as a component of equity. There were 8,416,815 shares subject to the Platinum Warrant as of March 31, 2017 . The Platinum Warrant expires on June 30, 2019.
Fair Value Measurement	Fair Value Measurement The Company utilizes three levels of inputs to measure the fair value of (a) nonfinancial assets and liabilities that are recognized or disclosed at fair value in the Company’s consolidated financial statements on a recurring basis (at least annually) and (b) all financial assets and liabilities. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The first two inputs are considered observable and the last is considered unobservable. The levels of inputs are as follows: • Level 1—Quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
Revenue Recognition	Revenue Recognition The Company ships products to customers based upon firm orders and revenue is recognized when the sales process is complete. This occurs when products are shipped to the customer in accordance with the terms of an agreement of sale, there is a fixed or determinable selling price, title and risk of loss have been transferred and collectability is reasonably assured. Based on product availability, customer requirements and customer consent, KEMET may ship products earlier than the initial planned ship date. Shipping and handling costs are included in cost of sales. A portion of sales is related to products designed to meet customer specific requirements. These products typically have stricter tolerances making them useful to the specific customer requesting the product and to customers with similar or less stringent requirements. The Company recognizes revenue when title to the products transfers to the customer. A portion of sales is made to distributors under agreements allowing certain rights of return and price protection on unsold merchandise held by distributors. The Company’s distributor policy includes inventory price protection and “ship-from-stock and debit” (“SFSD”) programs common in the industry. KEMET’s SFSD program provides authorized distributors with the flexibility to meet marketplace prices by allowing them, upon a case-by-case pre-approved basis, to adjust their purchased inventory cost to correspond with current market demand. Requests for SFSD adjustments are considered on an individual basis, require a pre-approved cost adjustment quote from their local KEMET sales representative and apply only to a specific customer, part, a specified special price amount, a specified quantity, and is only valid for a specific period of time. To estimate potential SFSD adjustments corresponding with current period sales, KEMET records a sales reserve based on historical SFSD credits, distributor inventory levels, and certain accounting assumptions, all of which are reviewed quarterly. Most of the Company’s distributors have the right to return to KEMET a certain portion of the purchased inventory, which, in general, does not exceed 6% of their purchases from the previous fiscal quarter. KEMET estimates future returns based on historical patterns of the distributors and records an allowance on the Consolidated Balance Sheets. The Company also offers volume-based rebates on a case-by-case basis to certain customers in each of the Company’s sales channels. The establishment of sales allowances is recognized as a component of the line item “Net sales” on the Consolidated Statements of Operations, while the associated reserves are included in the line item “Accounts receivable, net” on the Consolidated Balance Sheets. Estimates used in determining sales allowances are subject to various factors. This includes, but is not limited to, changes in economic conditions, pricing changes, product demand, inventory levels in the supply chain, the effects of technological change, and other variables that might result in changes to the Company’s estimates. The Company provides a limited warranty to customers that the Company’s products meet certain specifications. The warranty period is generally limited to one year , and the Company’s liability under the warranty is generally limited to a replacement of the product or refund of the purchase price of the product. Warranty costs were less than 1% of net sales for the fiscal years ended March 31, 2017 , 2016 and 2015 . The Company recognizes warranty costs when losses are both probable and reasonably estimable.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The Company evaluates the collectability of trade receivables through the analysis of customer accounts. When the Company becomes aware that a specific customer has filed for bankruptcy, has begun closing or liquidation proceedings, has become insolvent or is in financial distress, the Company records a specific allowance for the doubtful account to reduce the related receivable to the amount the Company believes is collectible. If circumstances related to specific customers change, the Company’s estimates of the recoverability of receivables could be adjusted. Accounts are written off after all means of collection, including legal action, have been exhausted.
Shipping and Handling Costs	Shipping and Handling Costs The Company’s shipping and handling costs are reflected in the line item “Cost of sales” on the Consolidated Statements of Operations. Shipping and handling costs were $16.4 million , $16.1 million , and $17.9 million in the fiscal years ended March 31, 2017 , 2016 and 2015 , respectively.
Income (Loss) per Share	Income (Loss) per Share Basic income (loss) per share is computed using the weighted-average number of shares outstanding. Diluted income (loss) per share is computed using the weighted-average number of shares outstanding adjusted for the incremental shares attributed to the Platinum Warrant, outstanding employee stock grants if such effects are dilutive.
Environmental Cost	Environmental Cost The Company recognizes liabilities for environmental remediation when it is probable that a liability has been incurred and can be reasonably estimated. The Company determines its liability on a site-by-site basis, and it is not discounted or reduced for anticipated recoveries from insurance carriers. In the event of anticipated insurance recoveries, such amounts would be presented on a gross basis in other current or non-current assets, as appropriate. Expenditures that extend the life of the related property or mitigate or prevent future environmental contamination are capitalized.
Derivative Financial Instruments	Derivative Financial Instruments Derivative financial instruments have been utilized by the Company to reduce exposures to volatility of foreign currencies impacting the sales and costs of its products. The Company accounts for derivatives and hedging activities in accordance with Accounting Standards Codification 815 (“ASC 815”), “ Derivatives and Hedging.” See Note 13 for further discussion of derivative financial instruments.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make a number of estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements. In addition, they affect the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include impairment of property and equipment, intangibles and goodwill; allowances for doubtful accounts, price protection and customers’ returns, and deferred income taxes; and assets and obligations related to employee benefits. Actual results could differ from these estimates and assumptions.
Impact of Recently Issued Accounting Standards	Impact of Recently Issued Accounting Standards In March 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The update requires employers to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of Operating income. The effective date of this update is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The update requires retrospective application to all periods presented. The Company plans to adopt this guidance in the first quarter of fiscal year 2018, and is currently performing its assessment of the impact of adopting the guidance; however, based on its expectations for the fiscal year ended March 31, 2018, the Company believes it will likely have a material impact due to the reclassification of pension and post-retirement benefit cost from Operating income to Non-operating income. Excluding the service costs, the net periodic pension and post-retirement benefit cost for the fiscal year ended March 31, 2018 is expected to be $1.3 million. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other. The update eliminates the requirement to calculate the implied fair value of goodwill to measure the amount of impairment loss, if any, under the second step of the current goodwill impairment test. Under the update, the goodwill impairment loss would be measured as the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The effective date of this update is for annual reporting periods beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this guidance on the Company’s consolidated financial statements, however the adoption of this guidance is not expected to have a significant effect on the Company's consolidated financial position, results of operations, or cash flows. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory. The update requires entities to recognize the income tax consequences of many intercompany asset transfers at the transaction date. The seller and buyer will immediately recognize the current and deferred income tax consequences of an intercompany transfer of an asset other than inventory. The tax consequences were previously deferred. The effective date of this update is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The update requires modified retrospective transition method which is a cumulative effect adjustment to retained earnings as of the beginning of the first effective reporting period. The Company plans to adopt this guidance in the first quarter of fiscal year 2018, however the impact of the adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update clarifies how cash receipts and cash payments in certain transactions are presented and classified in the statement of cash flows. The effective date of this update is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The update requires retrospective application to all periods presented but may be applied prospectively if retrospective application is impracticable. The Company is currently evaluating the impact of the adoption of this guidance on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation. This guidance changes several aspects of the accounting for share-based payment award transactions, including: (1) Accounting and Cash Flow Classification for Excess Tax Benefits and Deficiencies, (2) Forfeitures, and (3) Tax Withholding Requirements and Cash Flow Classification. This ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2016. Early application is permitted, and KEMET adopted ASU No. 2016-09 as of April 1, 2016. The Company elected to discontinue estimating forfeitures that are expected to occur and recorded a cumulative effect adjustment to retained earnings of $130,000 as of April 1, 2016. There was no cumulative adjustment related to the excess tax benefits as the Company did not have an additional paid in capital pool of excess tax benefits. The adoption did not have a significant impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases, as modified by ASU 2017-03, Transition and Open Effective Date Information. The ASU requires lessees to recognize a right-of-use asset and a lease liability for virtually all of their leases (other than short-term leases). The guidance is to be applied using a modified retrospective approach at the beginning of the earliest comparative period in the financial statements. This ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2018. Early application is permitted. The Company is currently in the process of assessing the impact the adoption of this guidance will have on the Company’s consolidated financial statements. In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory. The ASU requires an entity that uses first-in, first-out or average cost to measure its inventory at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. ASU 2015-11 was effective for interim and annual reporting periods beginning April 1, 2016. The adoption of ASU 2015-11 did not materially impact the Company’s operating results and financial position. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The ASU specifies that debt issuance costs related to a note shall be reported in the balance sheet as a direct reduction from the face amount of the note. In August 2015, the FASB issued ASU No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30) - Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements, which clarifies the treatment of debt issuance costs associated with line-of-credit arrangements that were not specifically addressed in ASU 2015-03. ASU 2015-15 states that entities may elect to continue to treat debt issuance costs associated with lines of credit as an asset, consistent with current treatment. The Company adopted these ASUs in the first quarter of fiscal year 2017. The ASUs did not impact the Company’s results of operations or liquidity. The balance sheet as of March 31, 2016 has been adjusted to reflect retrospective application of the new accounting guidance as follows (amounts in thousands): As Previously Reported Retrospective Adjustment As Adjusted Other assets $ 5,832 $ (2,764 ) $ 3,068 Total assets 702,544 (2,764 ) 699,780 Long-term debt, less current portion 388,597 (2,764 ) 385,833 Total liabilities and stockholders’ equity 702,544 (2,764 ) 699,780 In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements-Going Concern. The new guidance requires management to assess if there is substantial doubt about an entity’s ability to continue as a going concern for each annual and interim period. If conditions or events give rise to substantial doubt, disclosures are required. ASU 2014-15 is effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter; early application is permitted. This new guidance did not have a material impact on the Company’s Consolidated Financial Statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which supersedes existing accounting standards for revenue recognition and creates a single framework. The new guidance requires either a retrospective or a modified retrospective approach at adoption. Additional updates to Topic 606 issued by the FASB in 2015 and 2016 include the following: • ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which defers the effective date of the new guidance such that the new provisions will now be required for fiscal years, and interim periods within those years, beginning after December 15, 2017 (ASU No. 2015-14 is effective for the Company’s fiscal year that begins on April 1, 2018 and interim periods within that fiscal year). • ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations, which clarifies the implementation guidance on principal versus agent considerations (reporting revenue gross versus net). • ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, which clarifies the implementation guidance on identifying performance obligations and classifying licensing arrangements. • ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which clarifies the implementation guidance in a number of other areas. • ASU No. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers. • ASU No. 2017-03, Overall Transition and Open Effective Date Information. The effective date of this guidance is for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted , but not before the Company’s fiscal year that begins on April 1, 2017 (the original effective date of the ASU). The Company plans to adopt the requirements of the new standard in the first quarter of fiscal year 2019 and anticipate using the full retrospective transition method. The Company is currently in the process of assessing the impact the adoption of the new revenue standards will have on its consolidated financial statements and related disclosures. There are currently no other accounting standards that have been issued that will have a significant impact on the Company’s financial position, results of operations or cash flows upon adoption.

Organization and Significant 28

Organization and Significant Accounting Policies (Tables)	12 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of components of accumulated other comprehensive income (loss)	The following summary sets forth the components of accumulated other comprehensive income (loss) contained in the stockholders’ equity section of the Consolidated Balance Sheets (amounts in thousands): Foreign Currency Translation Gains (Losses) Defined Benefit Post-retirement Plan Adjustments Defined Benefit Pension Plans (3) Ownership Share of Equity Method Investees’ Other Comprehensive Income (Loss) Foreign Exchange Contracts Net Accumulated Other Comprehensive Income (Loss) Balance at March 31, 2015 $ (12,132 ) $ 1,159 $ (20,363 ) $ 1,537 $ 1,003 $ (28,796 ) Other comprehensive income (loss) before reclassifications (1) 1,860 146 3,865 (8,276 ) 2,618 213 Amounts reclassified in (out) of AOCI (1) — (191 ) 1,337 — (3,988 ) (2,842 ) Other comprehensive income (loss) 1,860 (45 ) 5,202 (8,276 ) (1,370 ) (2,629 ) Balance at March 31, 2016 (10,272 ) 1,114 (15,161 ) (6,739 ) (367 ) (31,425 ) Other comprehensive income (loss) before reclassifications (2) (15,284 ) 228 (536 ) 1,440 8,444 (5,708 ) Amounts reclassified in (out) of AOCI (2) — (208 ) 699 — (5,170 ) (4,679 ) Other comprehensive income (loss) (15,284 ) 20 163 1,440 3,274 (10,387 ) Balance at March 31, 2017 $ (25,556 ) $ 1,134 $ (14,998 ) $ (5,299 ) $ 2,907 $ (41,812 ) _______________________________________________________________________________ (1) Activity within foreign currency translation gains and defined benefit pension plans are net of a tax expense of zero and $0.3 million , respectively. (2) Activity within foreign currency translation losses and defined benefit pension plans are net of a tax benefit of zero and $0.7 million , respectively. (3) Balance is net of a tax benefit of $2.7 million , $2.0 million , and $2.3 million as of March 31, 2017 , March 31, 2016 , and March 31, 2015 , respectively.
Schedule of assets measured at fair value on a recurring basis	Assets and liabilities are measured at fair value on a recurring basis as of March 31, 2017 and 2016 are as follows (amounts in thousands): Carrying Value March 31, 2017 Fair Value March 31, 2017 Fair Value Measurement Using Level 1 Level 2 (2) Level 3 Assets and Liabilities: Money markets (1) $ 2,055 $ 2,055 $ 2,055 $ — $ — Total debt (388,211 ) (385,251 ) (353,000 ) (32,251 ) — TOKIN options, net (3) (9,900 ) (9,900 ) — — (9,900 ) Carrying Fair Fair Value Measurement Level 1 Level 2 (2) Level 3 Assets and Liabilities: Money markets (1) $ 738 $ 738 $ 738 $ — $ — Total debt (387,833 ) (284,261 ) (254,713 ) (29,548 ) — TOKIN options, net (3) (20,600 ) (20,600 ) — — (20,600 ) _______________________________________________________________________________ (1) Included in the line item “Cash and cash equivalents” on the Consolidated Balance Sheets. (2) The valuation approach used to calculate fair value was a discounted cash flow based on the borrowing rate for each respective debt facility. (3) See Note 5 , “Investment in TOKIN,” for a description of the TOKIN options. The value of the options is interrelated and depends on the enterprise value of TOKIN Corporation and its EBITDA over the duration of the instruments. Therefore, the options have been valued using option pricing methods in a Monte Carlo simulation. Changes to the Monte Carlo simulation inputs could have a material effect on the value of the TOKIN options.
Summary of NEC TOKIN option valuation activity using significant unobservable inputs (Level 3)	The table below summarizes TOKIN options valuation activity using significant unobservable inputs (Level 3) (amounts in thousand): March 31, 2015 $ 5,700 Change in value of TOKIN options (26,300 ) March 31, 2016 $ (20,600 ) Change in value of TOKIN options 10,700 March 31, 2017 $ (9,900 )

Debt (Tables)

Debt (Tables)	12 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Summary of Debt	A summary of debt is as follows (amounts in thousands): March 31, 2017 2016 10.5% Senior Notes, net (1) $ 352,472 $ 353,952 Revolving line of credit 33,881 33,881 Other, net (2) 1,858 — Total debt 388,211 387,833 Current maturities (2,000 ) (2,000 ) Total long-term debt $ 386,211 $ 385,833
Schedule of Cash and Non-cash components of Interest Expense	The line item “Interest expense” on the Consolidated Statements of Operations for the fiscal years 2017 , 2016 and 2015 , respectively, is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Contractual interest expense $ 38,825 $ 39,087 $ 38,953 Capitalized interest (154 ) (509 ) (237 ) Amortization of debt issuance costs 1,390 1,392 1,480 Amortization of debt (premium) discount (788 ) (745 ) (407 ) Imputed interest on acquisition related obligations 159 212 741 Interest expense on capital leases 323 168 171 Total interest expense $ 39,755 $ 39,605 $ 40,701
Schedule of Line of Credit Facilities [Table Text Block]	The Company had the following activity for the twelve month period ended March 31, 2017 and resulting balances under the revolving line of credit (amounts in thousands, excluding percentages): March 31, Twelve Month Period Ended March 31, 2017 March 31, 2017 Outstanding Borrowings Additional Borrowings Repayments Outstanding Borrowings Rate (1) (2) Due Date U.S. Facility $ 19,881 $ 12,000 $ — $ 31,881 5.000 % December 19, 2019 Singapore Facility Singapore Borrowing 1 12,000 — 12,000 — — — Singapore Borrowing 2 (3) 2,000 — — 2,000 3.375 % April 10, 2017 Total Facilities $ 33,881 $ 12,000 $ 12,000 $ 33,881
Schedule of the Company's annual maturities of debt	The following table highlights the Company’s annual cash maturities of debt (amounts in thousands): Annual Maturities of Debt Fiscal Years Ended March 31, 2018 2019 2020 2021 2022 Thereafter 10.5% Senior Notes (1) $ — $ 353,000 $ — $ — $ — $ — Revolving line of credit 2,000 — 31,881 — — — Other — — 396 396 396 1,187 $ 2,000 $ 353,000 $ 32,277 $ 396 $ 396 $ 1,187

Restructuring (Tables)

Restructuring (Tables)	12 Months Ended
	Mar. 31, 2017
Restructuring and Related Activities [Abstract]
Summary of the expenses aggregated on the Condensed Consolidated Statements of Operations line item "Restructuring charges"	A summary of the expenses aggregated on the Consolidated Statements of Operations line item “Restructuring charges” in the fiscal years ended March 31, 2017 , 2016 and 2015 , is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Manufacturing and sales office relocation costs $ 3,190 $ 2,375 $ 2,672 Personnel reduction costs 2,214 1,803 10,345 Restructuring charges $ 5,404 $ 4,178 $ 13,017
Schedule of reconciliation of the beginning and ending liability balances for restructuring charges included in the line items "Accrued expenses" and "Other non-current obligations" on the Condensed Consolidated Balance Sheets	A reconciliation of the beginning and ending liability balances for restructuring charges included in the line items “Accrued expenses” and “Other non-current obligations” on the Consolidated Balance Sheets were as follows (amounts in thousands): Personnel Reductions Manufacturing and Sales Office Relocation Costs Balance at March 31, 2014 $ 6,217 $ — Costs charged to expense 10,345 2,672 Costs paid or settled (7,995 ) (2,672 ) Change in foreign exchange (1,328 ) — Balance at March 31, 2015 7,239 — Costs charged to expense 1,803 2,375 Costs paid or settled (8,273 ) (2,375 ) Change in foreign exchange 207 — Balance at March 31, 2016 976 — Costs charged to expense 2,214 3,190 Costs paid or settled (2,130 ) (2,784 ) Change in foreign exchange (61 ) — Balance at March 31, 2017 $ 999 $ 406

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of the Company's intangible assets	The following table highlights the Company’s intangible assets (amounts in thousands): March 31, 2017 March 31, 2016 Carrying Amount Accumulated Amortization Carrying Amount Accumulated Amortization Indefinite Lived Intangible Assets: Trademarks $ 7,207 $ — $ 7,207 $ — Amortizing Intangibles: Purchased technology, customer relationships and patents (3 - 18 years) 39,527 16,953 43,089 16,995 $ 46,734 $ 16,953 $ 50,296 $ 16,995
Summary of changes in carrying amount of goodwill	The changes in the carrying amount of goodwill for the years ended March 31, 2017 and 2016 are as follows (amounts in thousands): Fiscal Year 2017 Fiscal Year 2016 Solid Capacitors Film and Electrolytic Corporate (1) Solid Capacitors Film and Electrolytic Corporate (1) Gross balance at beginning of fiscal year Goodwill $ 35,584 $ 1,092 $ 4,710 $ 35,584 $ 1,092 $ — Accumulated impairment losses — (1,092 ) — — (1,092 ) — Net balance at the end of the year $ 35,584 $ — $ 4,710 $ 35,584 $ — $ — Acquisitions $ — $ — $ — $ — $ — $ 4,710 Impairment charges $ — $ — $ — $ — $ — $ — Balance at the end of the year Goodwill $ 35,584 $ 1,092 $ 4,710 $ 35,584 $ 1,092 $ 4,710 Accumulated impairment losses — (1,092 ) — — (1,092 ) — Balance at the end of the year, net $ 35,584 $ — $ 4,710 $ 35,584 $ — $ 4,710

Investment in NEC TOKIN (Tables

Investment in NEC TOKIN (Tables)	12 Months Ended
	Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Reconciliation between NEC TOKIN and KEMET's equity investment loss	Summarized financial information for TOKIN follows (in thousands): March 31, March 31, Current assets continuing operations $ 204,654 $ 199,527 Assets held for sale (current) (1) 118,983 43,146 Noncurrent assets continuing operations 285,952 188,925 Assets held for sale (noncurrent) (1) — 72,360 Current liabilities continuing operations 375,433 146,207 Liabilities held for sale (current) (1) 50,008 36,078 Noncurrent liabilities continuing operations 65,657 313,768 Liabilities held for sale (noncurrent) (1) — 21,720 (1) As discussed in Note 19 , “ Subsequent Events, ” TOKIN sold its EMD business on April 14, 2017. Fiscal Year March 31, 2017 Fiscal Year March 31, 2016 Fiscal Year March 31, 2015 Net sales $ 328,822 $ 301,898 $ 321,540 Gross profit 74,465 67,409 66,722 Net income (loss) from continuing operations 106,103 (54,575 ) (43,085 ) Net income (loss) from discontinued operations (1) 22,399 11,580 18,994 Net income (loss) 128,502 (42,995 ) (24,091 ) (1) As discussed in Note 19 , “ Subsequent Events, ” TOKIN sold its EMD business on April 14, 2017. A reconciliation between TOKIN’s net loss and KEMET’s equity investment income (loss) follows (in thousands): Fiscal Year March 31, 2017 Fiscal Year March 31, 2016 Fiscal Year March 31, 2015 TOKIN net income (loss) $ 128,502 $ (42,995 ) $ (24,091 ) KEMET’s equity ownership % 34 % 34 % 34 % Equity income (loss) from TOKIN before Adjustments $ 43,691 $ (14,618 ) $ (8,191 ) Adjustments: Amortization and depreciation (2,210 ) (1,625 ) (2,270 ) Indemnity asset — — 8,500 Inventory profit elimination 162 (163 ) (208 ) Equity income (loss) from TOKIN $ 41,643 $ (16,406 ) $ (2,169 ) A reconciliation between TOKIN’s net assets and KEMET’s equity investment balance follows (amounts in thousands): March 31, 2017 March 31, 2016 Investment in TOKIN $ 63,416 $ 20,334 Purchase price accounting basis adjustment: Property, plant and equipment (1) 3,080 3,365 Technology (1) (8,691 ) (10,134 ) Long-term debt (1) (1,067 ) (1,975 ) Goodwill (7,590 ) (7,555 ) Indemnity asset for legal investigation (8,500 ) (8,500 ) Inventory profit elimination (2) 208 371 Other (569 ) (603 ) KEMET’s 34% interest of TOKIN’s equity $ 40,287 $ (4,697 ) (1) Depreciated or amortized over the estimated lives. (2) Adjusted each period for any activity.

Segment and Geographic Inform33

Segment and Geographic Information (Tables)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting [Abstract]
Summary of the profit or loss and total assets for each reportable segment		The following tables summarize information about each segment’s net sales, operating income (loss), depreciation and amortization, capital expenditures and total assets (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Net sales: Solid Capacitors $ 575,110 $ 556,303 $ 621,275 Film and Electrolytic 182,681 178,520 201,917 $ 757,791 $ 734,823 $ 823,192 Operating income (loss) (1)(2)(3): Solid Capacitors $ 146,694 $ 129,909 $ 135,946 Film and Electrolytic (8,278 ) (71 ) (16,685 ) Corporate (103,876 ) (97,512 ) (96,883 ) $ 34,540 $ 32,326 $ 22,378 Depreciation and amortization: Solid Capacitors $ 20,824 $ 21,318 $ 21,202 Film and Electrolytic 10,953 11,984 13,886 Corporate 5,561 5,714 5,680 $ 37,338 $ 39,016 $ 40,768 Capital expenditures: Solid Capacitors $ 12,300 $ 10,098 $ 12,552 Film and Electrolytic 7,955 5,902 7,752 Corporate 5,362 4,469 1,928 $ 25,617 $ 20,469 $ 22,232 _______________________________________________________________________________ (1) Restructuring charges included in Operating income (loss) were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Total restructuring: Solid Capacitors $ 1,333 $ 1,916 $ 3,297 Film and Electrolytic 3,738 1,714 8,221 Corporate 333 548 1,499 $ 5,404 $ 4,178 $ 13,017 (2) Impairment charges and write downs included in Operating income (loss) were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Impairment and write down of long-lived assets: Solid Capacitors $ 2,076 $ — $ — Film and Electrolytic 8,203 — — $ 10,279 $ — $ — (3) (Gain) loss on sales and disposals of assets included in Operating income (loss) were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 (Gain) loss on sales and disposals of assets: Solid Capacitors $ 227 $ 536 $ 606 Film and Electrolytic 136 (270 ) (1,008 ) Corporate 29 109 181 $ 392 $ 375 $ (221 ) _______________________________________________________________________________ March 31, 2017 2016 Total assets: Solid Capacitors $ 439,281 $ 424,659 Film and Electrolytic 204,407 234,822 Corporate 90,840 40,299 $ 734,528 $ 699,780
Schedule of net sales by geographical location	The following highlights net sales by geographic location (amounts in thousands): Fiscal Years Ended March 31,(1) 2017 2016 2015 United States $ 198,250 $ 201,878 $ 238,840 Hong Kong 121,813 133,117 131,109 Germany 104,755 83,589 107,859 Europe (2) 64,316 57,362 58,879 China 71,223 65,043 65,289 Asia Pacific (2) 54,767 61,414 62,864 United Kingdom 33,837 28,083 32,127 Netherlands 32,478 31,218 38,853 Singapore 15,565 16,260 22,516 Italy 15,376 14,391 19,013 Hungary 18,856 17,766 22,745 Mexico 22,424 23,041 21,164 Other Countries (2) 4,131 1,661 1,934 Total Non-United States $ 559,541 $ 532,945 $ 584,352 $ 757,791 $ 734,823 $ 823,192 _______________________________________________________________________________ (1) Revenues are attributed to countries or regions based on the location of the customer. Net Sales to one customer exceeded 10% of total net sales as follows: $104.4 million , $99.3 million and $124.4 million in fiscal years 2017 , 2016 and 2015 , respectively. Solid Capacitor net sales to one customer over 10% were $89.4 million , $85.3 million and $109.1 million in fiscal years 2017 , 2016 and 2015 , respectively. Film and Electrolytic net sales to one customer over 10% were $14.0 million and $15.3 million in fiscal years 2016 and 2015 , respectively; no single customer exceeded 10% of total Film and Electrolytic net sales in fiscal year 2017 . (2) No country included in this caption exceeded 3% of consolidated net sales for fiscal years 2017 , 2016 and 2015 .
Schedule of property, plant and equipment, net, based on physical location	The following geographic information includes Property, plant and equipment, net, based on physical location (amounts in thousands): March 31, 2017 2016 United States $ 46,387 $ 54,658 Mexico 55,878 61,859 Italy 36,108 44,699 China 23,780 26,705 Portugal 21,637 23,449 Macedonia 12,339 14,131 Sweden 5,851 6,876 Other (1) 7,331 9,462 Total Non-United States $ 162,924 $ 187,181 $ 209,311 $ 241,839

Discontinued Operations Discont

Discontinued Operations Discontinued Operations (Tables)	12 Months Ended
	Mar. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Net sales and net operating (loss) from the Company's discontinued operation	Net sales and net operating loss from the Company’s discontinued operation for years ended March 31, 2017 , 2016 and 2015 were as follows (in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Net sales $ — $ — $ 104 Operating income (loss) — — (265 ) KEMET's proportionate share of TOKIN's gain on the sale of the EMD business is calculated as follows: Oku-Yen $USD (in millions)* Sales price ¥ 495.8 $ 443.4 Less: Carrying amount of EMD net assets 77.1 69.0 Remove AOCI 5.2 4.6 Transaction related fees and taxes 6.8 6.1 Deferred tax asset 13.8 123.1 Gain on sale 392.9 240.6 KEMET's equity interest 34 % 34 % KEMET's gain on sale (1) ¥ 133.6 $ 81.8 *Utilizing an exchange rate as of March 31, 2017 of 111.82 Japanese Yen to 1.00 U.S. Dollar.

Acquisitions (Tables)

Acquisitions (Tables) - Intellidata [Member]	12 Months Ended
	Mar. 31, 2017
Acquisitions
Schedule of allocations of the aggregate purchase price based on the assets and liabilities estimated fair values	Fair Value Cash $ 233 Accounts receivable 10 Other current assets 6 Property, plant and equipment 3 Goodwill 4,710 Intangible assets 1,820 Current liabilities (9 ) Deferred income taxes (648 ) Total net assets acquired $ 6,125
Schedule of the amounts assigned to intangible assets	The following table presents the amounts assigned to intangible assets (amounts in thousands except useful life data): Fair Value Useful Life (years) Developed technology $ 1,820 10

Pension and Other Post-retire36

Pension and Other Post-retirement Benefit Plans (Tables)	12 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Summary of the changes in benefit obligations and plan assets	A summary of the changes in benefit obligations and plan assets is as follows (amounts in thousands): Pension Other Benefits 2017 2016 2017 2016 Change in Benefit Obligation Benefit obligation at beginning of the year $ 45,716 $ 49,342 $ 623 $ 846 Service cost 1,298 1,507 — — Interest cost 1,297 1,347 11 19 Plan participants’ contributions — — 592 464 Plan amendments — 342 — — Actuarial (gain) loss 1,980 (4,922 ) (228 ) (146 ) Foreign currency exchange rate change (3,732 ) 221 — — Gross benefits paid (1,120 ) (1,425 ) (612 ) (560 ) Curtailments and settlements (268 ) (696 ) — — Benefit obligation at end of year $ 45,171 $ 45,716 $ 386 $ 623 Change in Plan Assets Fair value of plan assets at beginning of year $ 10,268 $ 10,483 $ — $ — Actual return on plan assets 1,099 (46 ) — — Foreign currency exchange rate changes (1,361 ) (242 ) — — Employer contributions 1,176 1,528 20 96 Settlements (58 ) (30 ) — — Plan participants’ contributions — — 592 464 Gross benefits paid (1,120 ) (1,425 ) (612 ) (560 ) Fair value of plan assets at end of year $ 10,004 $ 10,268 $ — $ — Funded status at end of year Fair value of plan assets $ 10,004 $ 10,268 $ — $ — Benefit obligations (45,171 ) (45,716 ) (386 ) (623 ) Amount recognized at end of year $ (35,167 ) $ (35,448 ) $ (386 ) $ (623 )
Schedule of amounts recognized in the Consolidated Balance Sheets	Amounts recognized in the Consolidated Balance Sheets consist of the following (amounts in thousands): Pension Other Benefits 2017 2016 2017 2016 Current liability $ (827 ) $ (833 ) $ (52 ) $ (82 ) Noncurrent liability (34,340 ) (34,615 ) (334 ) (541 ) Amount recognized, end of year $ (35,167 ) $ (35,448 ) $ (386 ) $ (623 )
Schedule of amounts recognized in Accumulated other comprehensive income (loss)	Amounts recognized in Accumulated other comprehensive income (loss) consist of the following (amounts in thousands): Pension Other Benefits 2017 2016 2017 2016 Net actuarial loss (gain) $ 16,196 $ 15,585 $ (1,134 ) $ (1,114 ) Prior service cost 1,500 1,582 — — Accumulated other comprehensive (income) loss $ 17,696 $ 17,167 $ (1,134 ) $ (1,114 )
Schedule of components of benefit costs (credit)	Components of benefit costs (credit) consist of the following (amounts in thousands): Pension Other Benefits 2017 2016 2015 2017 2016 2015 Net service cost $ 1,298 $ 1,507 $ 1,286 $ — $ — $ — Interest cost 1,297 1,347 1,819 11 19 29 Expected return on plan assets (346 ) (433 ) (499 ) — — — Amortization: Actuarial (gain) loss 419 704 277 (207 ) (191 ) (187 ) Prior service cost 82 60 17 — — — Recurring activity 2,750 3,185 2,900 (196 ) (172 ) (158 ) One time expense (income) (11 ) — — — — — Net periodic benefit cost (credit) $ 2,739 $ 3,185 $ 2,900 $ (196 ) $ (172 ) $ (158 )
Schedule of asset allocation for the Company's defined benefit pension plans and the target allocation by asset category	The asset allocation for the Company’s defined benefit pension plans at March 31, 2017 and the target allocation for 2017 , by asset category, are as follows: Asset Category Target Allocation (%) Plan Assets at March 31, 2017 (%) Insurance (1) 10 6 International equities 15 18 International bonds 60 63 Other 15 13 Total 100 100 _______________________________________________________________________________ (1) Comprised of assets held by the defined benefit pension plan in Germany.
Schedule of other changes in plan assets and benefit obligations recognized in Accumulated other comprehensive income (loss)	Other changes in plan assets and benefit obligations recognized in Accumulated other comprehensive income (loss) are as follows (amounts in thousands): Pension Other Benefits 2017 2016 2015 2017 2016 2015 Current year actuarial (gain) loss $ 1,229 $ (5,125 ) $ 12,397 $ (228 ) $ (146 ) $ 118 Amortization of actuarial gain (loss) (619 ) (698 ) (258 ) 208 191 187 Current year prior service cost — 342 1,006 — — — Amortization of prior service cost (82 ) (60 ) (17 ) — — — Total recognized in other comprehensive income $ 528 $ (5,541 ) $ 13,128 $ (20 ) $ 45 $ 305 Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 3,267 $ (2,356 ) $ 16,028 $ (216 ) $ (127 ) $ 147
Schedule of expected future benefit payments	The Company expects to have benefit payments in the future as follows (amounts in thousands): Expected benefit payments 2018 2019 2020 2021 2022 2021- 2025 Pension benefits $ 1,467 $ 1,562 $ 1,619 $ 1,584 $ 1,651 $ 11,090 Other benefits 53 50 47 43 39 140 Total $ 1,520 $ 1,612 $ 1,666 $ 1,627 $ 1,690 $ 11,230
Schedule of weighted-average assumptions used to determine the projected benefit obligation at the measurement date and the net periodic cost for the pension and post-retirement plan	The following weighted-average assumptions were used to determine the projected benefit obligation at the measurement date and the net periodic cost for the pension and post-retirement plan (amounts in thousands except percentages): Pension Other Benefits 2017 2016 2017 2016 Projected benefit obligation: Discount rate 3.1 % 3.2 % 3.2 % 2.8 % Rate of compensation increase 3.5 % 3.4 % — % — % Health care cost trend on covered charges — % — % 7.0% 7.0% Net periodic benefit cost: Discount rate 3.1 % 2.8 % 2.8 % 2.9 % Rate of compensation increase 3.5 % 3.5 % — % — % Expected return on plan assets 3.2 % 4.0 % — % — % Health care cost trend on covered charges — % — % 7.0% 7.0% Sensitivity of retiree welfare results Effect of a one percentage point increase in assumed health care cost trend: —On total service and interest costs components $ — $ — —On post-retirement benefits obligation — 6 Effect of a one percentage point decrease in assumed health care cost trend: —On total service and interest costs components — — —On post-retirement benefits obligation — (6 )
Schedule of fair value of pension plan assets measured on recurring basis	The Company evaluated input from its third-party actuary to determine the appropriate discount rate. The determination of the discount rate is based on various factors such as the rate on bonds, term of the expected payou
Summary of changes in the fair value of the defined benefit pension plan's Level 3 assets	The table below sets forth a summary of changes in the fair value of the defined benefit pension plan’s Level 3 assets for the fiscal years ended March 31, 2016 and March 31, 2017 (amounts in thousands): Balance at March 31, 2015 $ 576 Actual return on plan assets 14 Employer contributions 189 Benefits paid (202 ) Foreign currency exchange rate change 34 Balance at March 31, 2016 $ 611 Actual return on plan assets 20 Employer contributions 198 Benefits paid (211 ) Foreign currency exchange rate change (38 ) Balance at March 31, 2017 $ 580

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of major components of stock-based compensation expense	The major components of stock-based compensation expense are as follows (amounts in thousands): Fiscal year ended Fiscal year ended Fiscal year ended Stock Options Restricted Stock LTIPs Stock Options Restricted Stock LTIPs Stock Options Restricted Stock LTIPs Cost of sales $ 21 $ 634 $ 729 $ 81 $ 617 $ 720 $ 233 $ 269 $ 1,075 Selling, general and administrative expenses 20 1,490 1,620 78 1,352 1,732 306 787 1,547 Research and development 1 26 179 4 23 167 13 3 279 $ 42 $ 2,150 $ 2,528 $ 163 $ 1,992 $ 2,619 $ 552 $ 1,059 $ 2,901
Schedule of employee stock option activity	Employee stock option activity for fiscal year 2017 is as follows: Options (in thousands) Weighted- Average Exercise Price Outstanding at March 31, 2016 1,254 $ 7.63 Granted — — Exercised (204 ) 5.55 Forfeited — — Expired (86 ) 16.72 Outstanding at March 31, 2017 964 7.27 Exercisable at March 31, 2017 964 $ 7.27 Remaining weighted average contractual life of options exercisable (years) 4.1 Remaining weighted average contractual life of options outstanding (years) 4.1
Summary of the weighted average assumptions used in the Black-Scholes valuation model to value stock option grants	Amounts included in the following table are in thousands, except weighted average fair value and weighted average exercise price: Fiscal Years Ended 2017 2016 2015 Weighted average grant-date fair value of non-vested shares $ — $ 2.72 $ 2.73 Weighted average grant-date fair value of shares Granted — — — Vested 2.72 2.73 3.50 Forfeited 2.72 2.81 3.25 Total estimated fair value of shares vested 223 548 1,000 Intrinsic value Stock options exercised 890 — — Options outstanding 5,272 Options currently exercisable 5,272 Total unrecognized compensation cost, net of estimated forfeitures, non-vested options — Weighted-average period of recognition for unrecognized compensation cost (in years) N/A Weighted average exercise price of stock options expected to vest N/A
Schedule of restricted stock activity	Restricted stock unit activity for fiscal year 2017 is as follows (amounts in thousands except fair value): Shares Weighted- average Fair Value on Grant Date Non-vested restricted stock at March 31, 2016 1,430 $ 3.51 Granted 386 4.91 Vested (409 ) 3.18 Forfeited (25 ) 3.39 Non-vested restricted stock at March 31, 2017 1,382 $ 4.00

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of components of income (loss) before income taxes and equity loss from NEC TOKIN	The components of Income (loss) from continuing operations before income taxes and equity loss from TOKIN are as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Domestic (U.S.) $ 653 $ (38,581 ) $ (26,238 ) Foreign (Outside U.S.) 9,983 7,364 14,112 Total $ 10,636 $ (31,217 ) $ (12,126 )
Schedule of the provision (benefit) for income tax expense	The provision (benefit) for Income tax expense is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Current: Federal $ — $ — $ — State and local 62 95 (92 ) Foreign 4,247 5,416 7,403 Total current income tax expense from continuing operations 4,309 5,511 7,311 Deferred: Federal (6 ) (647 ) 270 State and local (97 ) 172 39 Foreign 84 970 (2,393 ) Deferred tax expense (benefit) from continuing operations (19 ) 495 (2,084 ) Provision for income taxes $ 4,290 $ 6,006 $ 5,227
Schedule of reconciliation of the statutory federal income tax rate to the effective income tax rate	Differences between the provision for income taxes on earnings from continuing operations and the amount computed using the U.S. Federal statutory income tax rate are as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Amount computed using the statutory rate of 35% $ 3,722 $ (10,926 ) $ (4,245 ) Change in U.S. valuation allowance (7,080 ) 4,099 (19,691 ) Unremitted earnings of foreign subsidiaries 2,127 (231 ) 18,502 Effect of prior year adjustments (1) 1,789 (286 ) 5,766 Expired foreign tax credits 4,766 — — Effect of business combination — (648 ) — Taxable foreign source income 1,835 2,415 4,660 (Put)/call option valuation impact (3,745 ) 7,381 — Other non-deductible expenses (937 ) 126 217 State income taxes, net of federal taxes (35 ) 267 (53 ) Change in foreign operations tax exposure reserves 108 998 1,119 Change in foreign tax law 144 981 — Change in foreign operations valuation allowance (2) 983 (200 ) 1,378 Other effect of foreign operations 613 2,030 (2,426 ) Provision for income taxes $ 4,290 $ 6,006 $ 5,227 (1) The effect of prior year adjustments is offset by a full valuation allowance resulting in no impact on the provision for income taxes. (2) The change in foreign operations valuation allowance excludes other comprehensive income and currency translation adjustments of $0.9 million , $0.6 million , and $(3.4) million for fiscal years ended 2017 , 2016 and 2015 , respectively which has no impact on the provision for income taxes.
Schedule of annual activities included in the deferred tax valuation allowance	The following table presents the annual activities included in the deferred tax valuation allowance (amounts in thousands): Valuation Allowance for Deferred Tax Assets Balance at March 31, 2014 $ 189,276 Charge to costs and expenses (19,900 ) Deductions (1,782 ) Balance at March 31, 2015 167,594 Charge to costs and expenses 4,072 Deductions (749 ) Balance at March 31, 2016 170,917 Charge to costs and expenses (2,094 ) Deductions (4,925 ) Balance at March 31, 2017 $ 163,898
Schedule of the components of deferred tax assets and liabilities	The components of deferred tax assets and liabilities are as follows (amounts in thousands): March 31, 2017 2016 Deferred tax assets: Net operating loss carry forwards $ 165,161 $ 173,041 Sales allowances and inventory reserves 14,910 16,918 Medical and employee benefits 16,336 11,234 Tax credits 4,954 9,840 Stock-based compensation 2,501 2,576 Other 2,357 2,988 Total deferred tax assets before valuation allowance 206,219 216,597 Less valuation allowance (163,898 ) (170,917 ) Total deferred tax assets 42,321 45,680 Deferred tax liabilities: Unremitted earnings of subsidiaries (20,265 ) (18,271 ) Depreciation and differences in basis (7,576 ) (11,718 ) Amortization of intangibles and debt discounts (6,207 ) (7,107 ) Non-amortized intangibles (2,549 ) (2,556 ) Other (501 ) (451 ) Total deferred tax liabilities (37,098 ) (40,103 ) Net deferred tax assets $ 5,223 $ 5,577 The change in net deferred income tax asset (liability) for the current year is presented below (amounts in thousands): Balance at March 31, 2016 $ 5,577 Deferred income taxes related to continuing operations 19 Deferred income taxes related to other comprehensive income 181 Foreign currency translation (554 ) Balance at March 31, 2017 $ 5,223
Schedule of tax credit carryforwards available	At March 31, 2017 , the U.S. consolidated group of companies had the following tax credit carryforwards available (amounts in thousands): Tax Credits ($) Fiscal Year of Expiration U.S. foreign tax credits $ 407 2018 U.S. research credits 1,425 2023 Texas franchise tax credits 3,122 2026
Schedule of reconciliation of gross unrecognized tax benefits (excluding interest and penalties)	At March 31, 2017 , the Company had $7.4 million of unrecognized tax benefits. A reconciliation of gross unrecognized tax benefits (excluding interest and penalties) is as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Beginning of fiscal year $ 7,103 $ 6,377 $ 5,691 Additions for tax positions of the current year 762 763 1,115 Reductions for tax positions of prior years (64 ) — (56 ) Lapse in statute of limitations (411 ) (10 ) (203 ) Settlements — (27 ) (170 ) End of fiscal year $ 7,390 $ 7,103 $ 6,377

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The balance sheet classifications and fair value of derivative instruments as of March 31, 2017 and 2016 are as follows (amounts in thousands): Fair Value of Derivative Instruments March 31, 2017 March 31, 2016 Balance Sheet Presentation As Presented (1) Offset Gross As Presented (1) Offset Gross Prepaid and other current assets $ 2,907 $ 40 $ 2,947 $ — $ 523 $ 523 Accrued expenses — (40 ) (40 ) (367 ) (523 ) (890 ) $ 2,907 $ — $ 2,907 $ (367 ) $ — $ (367 ) ______________________________________________________________________________ (1) Fair Value measured using Level 2 inputs by adjusting the market spot rate by forward points, based on the date of the contract. The spot rates and forward points used are based on an average rate from an actively traded market.
Derivative Instruments, Gain (Loss)	The impact on the Consolidated Statement of Operations for the twelve month periods ended March 31, 2017 and 2016 is as follows (amounts in thousands): Impact of Foreign Exchange Contracts on Condensed Consolidated Statement of Operations Twelve Month Periods Ended March 31, Statement Caption 2017 2016 Net Sales $ — $ (789 ) Operating costs and expenses: Cost of sales 5,170 3,199 Total operating costs and expenses 5,170 3,199 Operating income (loss) $ (5,170 ) $ (3,988 )

Supplemental Balance Sheets a40

Supplemental Balance Sheets and Statements of Operations Detail (Tables)	12 Months Ended
	Mar. 31, 2017
Disclosure Text Block Supplement [Abstract]
Schedule of accounts receivable	March 31, (amounts in thousands) 2017 2016 Accounts receivable: Trade $ 112,940 $ 116,146 Allowance for doubtful accounts reserve (942 ) (1,002 ) Ship-from-stock and debit reserve (15,489 ) (17,362 ) Returns reserves (2,913 ) (3,324 ) Rebates reserves (564 ) (872 ) Price protection reserves (506 ) (418 ) Accounts receivable, net $ 92,526 $ 93,168
Schedule of activity in allowances for accounts receivables	The following table presents the annual activities included in the allowance for these commitments (amounts in thousands): Balance at March 31, 2014 $ 24,660 Cost charged to expense 91,091 Actual adjustments applied (90,909 ) Other (195 ) Balance at March 31, 2015 24,647 Cost charged to expense 95,212 Actual adjustments applied (96,932 ) Other 51 Balance at March 31, 2016 22,978 Cost charged to expense 87,317 Actual adjustments applied (89,762 ) Other (119 ) Balance at March 31, 2017 $ 20,414
Schedule of components of inventories	March 31, (amounts in thousands) 2017 2016 Inventories: Raw materials and supplies $ 65,750 $ 80,289 Work in process 47,408 46,631 Finished goods 50,738 58,060 Inventory gross 163,896 184,980 Inventory reserves (15,941 ) (16,101 ) Inventory, net $ 147,955 $ 168,879
Schedule of the annual activities included in the allowance for commitments	The following table presents the annual activities included in the inventory reserves (amounts in thousands): Balance at March 31, 2014 $ 26,826 Costs charged to expense 9,291 Write-offs (17,520 ) Other (1,098 ) Balance at March 31, 2015 17,499 Costs charged to expense 5,696 Write-offs (7,326 ) Other 232 Balance at March 31, 2016 16,101 Costs charged to expense 6,163 Write-offs (6,125 ) Other (198 ) Balance at March 31, 2017 $ 15,941
Schedule of Property, plant and equipment	Useful life (years) March 31, (amounts in thousands, except years) 2017 2016 Property, plant and equipment: Land and land improvements 20 $ 21,642 $ 22,380 Buildings 20 - 40 140,895 148,805 Machinery and equipment 10 783,288 793,250 Furniture and fixtures 4 - 10 68,706 69,442 Construction in progress 14,653 21,197 Other 1,403 2,103 Total property and equipment 1,030,587 1,057,177 Accumulated depreciation (821,276 ) (815,338 ) Property, plant and equipment, net $ 209,311 $ 241,839
Schedule of accrued expenses	March 31, (amounts in thousands) 2017 2016 Accrued expenses: Salaries, wages, and related employee costs $ 29,589 $ 20,708 Interest 15,603 15,683 Restructuring 984 946 Vacation 7,524 7,892 Other 4,052 5,091 Total accrued expenses $ 57,752 $ 50,320
Schedule of other non-current obligations	March 31, (amounts in thousands) 2017 2016 Other non-current obligations: Pension plans $ 34,674 $ 35,156 Employee separation liability 8,685 9,352 Deferred compensation 1,774 1,544 Long-term obligation on land purchase 898 1,349 Restructuring 15 30 TOKIN option valuation 9,900 20,600 Long-term service contracts 339 2,343 Other 3,846 4,518 Total other non-current obligations $ 60,131 $ 74,892
Schedule of other (income) expense, net	Fiscal Years Ended March 31, (amounts in thousands) 2017 2016 2015 Non-operating (income) expense, net: Net foreign exchange (gains) losses $ (3,758 ) $ (3,036 ) $ (4,249 ) Insurance proceeds (423 ) — — Gain on early extinguishment of debt — — (1,003 ) Offering memorandum fees — — 1,142 Other (946 ) 688 28 Total non-operating (income) expense, net $ (5,127 ) $ (2,348 ) $ (4,082 )

Income_Loss Per Share (Tables)

Income/Loss Per Share (Tables)	12 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Schedule of the basic and diluted weighted-average number of shares of common stock	The following table presents the basic and diluted weighted-average number of shares of common stock (amounts in thousands, except per share data): Fiscal Years Ended March 31, 2017 2016 2015 Numerator Income (loss) from continuing operations $ 47,989 $ (53,629 ) $ (19,522 ) Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively — — 5,379 Net income (loss) $ 47,989 $ (53,629 ) $ (14,143 ) Denominator: Weighted-average common shares outstanding: Basic 46,552 46,004 45,381 Assumed conversion of employee stock grants 2,235 — — Assumed conversion of Platinum Warrant 6,602 — — Weighted-average shares outstanding (diluted) 55,389 46,004 45,381 Net income (loss) per basic share: Income (loss) from continuing operations $ 1.03 $ (1.17 ) $ (0.43 ) Income (loss) from discontinued operations, net of income tax expense (benefit) $ — $ — $ 0.12 Net income (loss) $ 1.03 $ (1.17 ) $ (0.31 ) Net income (loss) per diluted share: Income (loss) from continuing operations $ 0.87 $ (1.17 ) $ (0.43 ) Income (loss) from discontinued operations, net of income tax expense (benefit) $ — $ — $ 0.12 Net income (loss) $ 0.87 $ (1.17 ) $ (0.31 )
Schedule of common stock equivalents that could potentially dilute net income per basic share in the future, but were not included in the computation of diluted earnings per share because the impact would have been antidilutive	Common stock equivalents that could potentially dilute net income per basic share in the future, but were not included in the computation of diluted earnings per share because the impact would have been antidilutive, were as follows (amounts in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Assumed conversion of employee stock grants 771 3,329 1,783 Assumed conversion of Platinum Warrant — 4,951 6,287

Commitments and Contingencies (

Commitments and Contingencies (Table)	12 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Future minimum lease payments over the next five fiscal years and thereafter under non-cancelable operating leases	Future minimum lease payments over the next five fiscal years and thereafter under non-cancellable operating leases at March 31, 2017 , are as follows (amounts in thousands): Fiscal Years Ended March 31, 2018 2019 2020 2021 2022 Thereafter Minimum lease payments $ 5,980 $ 4,236 $ 1,954 $ 862 $ 475 $ 585

Quarterly Results of Operatio43

Quarterly Results of Operations (Unaudited) (Table)	12 Months Ended
	Mar. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of quarterly information	The following table sets forth certain quarterly information for fiscal years 2017 and 2016 . This information, in the opinion of the Company’s management, reflects all adjustments (consisting only of normal recurring adjustments) necessary to present fairly this information when read in conjunction with the consolidated financial statements and notes thereto included elsewhere herein (amounts in thousands except per share data): Fiscal Year 2017 Quarters Ended Jun-30 Sep-30 Dec-31 Mar-31 Net sales $ 184,935 $ 187,308 $ 188,029 $ 197,519 Operating income (loss) (1) 8,898 3,050 13,850 8,742 Net income (loss) (12,205 ) (4,998 ) 12,278 52,914 Net income (loss) per basic share $ (0.26 ) $ (0.11 ) $ 0.26 $ 1.13 Net income (loss) per diluted share $ (0.26 ) $ (0.11 ) $ 0.22 $ 0.93 Fiscal Year 2016 Quarters Ended Jun-30 Sep-30 Dec-31 Mar-31 Net sales $ 187,590 $ 186,123 $ 177,184 $ 183,926 Operating income (loss) (1) 1,243 13,987 8,493 8,603 Net income (loss) (37,050 ) 7,194 (8,600 ) (15,173 ) Net income (loss) per basic share $ (0.81 ) $ 0.16 $ (0.19 ) $ (0.33 ) Net income (loss) per diluted share $ (0.80 ) $ 0.14 $ (0.19 ) $ (0.32 ) _______________________________________________________________________________ (1) Operating income (loss) as a percentage of net sales fluctuates from quarter to quarter due to a number of factors, including net sales fluctuations, foreign currency exchange, restructuring charges, product mix, the timing and expense of moving product lines to lower-cost locations, the write-down of long lived assets, the net gain/loss on sales and disposals of assets and the relative mix of sales among distributors, original equipment manufacturers, and electronic manufacturing service providers.

Condensed Consolidating Finan44

Condensed Consolidating Financial Statements (Tables)	12 Months Ended
	Mar. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Balance Sheet	Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ 2,072 $ 72,705 $ 34,997 $ — $ 109,774 Accounts receivable, net — 30,265 62,261 — 92,526 Intercompany receivable 33,613 215,183 170,837 (419,633 ) — Inventories, net — 97,761 50,194 — 147,955 Prepaid expenses and other 3,325 14,460 13,938 (2,964 ) 28,759 Total current assets 39,010 430,374 332,227 (422,597 ) 379,014 Property and equipment, net 481 81,818 127,012 — 209,311 Investments in TOKIN — 63,416 — — 63,416 Investments in subsidiaries 473,147 421,577 93,359 (988,083 ) — Goodwill — 40,294 — — 40,294 Intangible assets, net — 24,665 5,116 — 29,781 Deferred income taxes — 896 7,697 — 8,593 Other assets — 3,543 576 — 4,119 Long-term intercompany receivable 63,385 38,902 1,089 (103,376 ) — Total assets $ 576,023 $ 1,105,485 $ 567,076 $ (1,514,056 ) $ 734,528 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities: Current portion of long-term debt $ — $ — $ 2,000 $ — $ 2,000 Accounts payable, trade 3 34,790 34,881 — 69,674 Intercompany payable 50,051 294,940 74,642 (419,633 ) — Accrued expenses 18,822 19,552 19,378 — 57,752 Income taxes payable — 2,997 682 (2,964 ) 715 Total current liabilities 68,876 352,279 131,583 (422,597 ) 130,141 Long-term debt, less current portion 352,472 31,881 1,858 — 386,211 Other non-current obligations — 13,151 46,980 — 60,131 Deferred income taxes — 2,236 1,134 — 3,370 Long-term intercompany payable — 63,385 39,991 (103,376 ) — Stockholders’ equity 154,675 642,553 345,530 (988,083 ) 154,675 Total liabilities and stockholders’ equity $ 576,023 $ 1,105,485 $ 567,076 $ (1,514,056 ) $ 734,528 Condensed Consolidating Balance Sheet March 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ 640 $ 36,209 $ 28,155 $ — $ 65,004 Accounts receivable, net — 41,025 52,143 — 93,168 Intercompany receivable 30,210 132,523 170,224 (332,957 ) — Inventories, net — 113,289 55,590 — 168,879 Prepaid expenses and other 3,325 12,161 12,974 (2,964 ) 25,496 Total current assets 34,175 335,207 319,086 (335,921 ) 352,547 Property and equipment, net 255 93,936 147,648 — 241,839 Investment in TOKIN — 20,334 — — 20,334 Investment in subsidiaries 382,108 429,723 93,359 (905,190 ) — Goodwill — 40,294 — — 40,294 Intangible assets, net — 27,252 6,049 — 33,301 Deferred income taxes — 800 7,597 — 8,397 Other assets — 2,452 616 — 3,068 Long-term intercompany receivable 67,500 41,428 1,088 (110,016 ) — Total assets $ 484,038 $ 991,426 $ 575,443 $ (1,351,127 ) $ 699,780 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities: Current portion of long-term debt $ 2,000 $ — $ — $ — $ 2,000 Accounts payable, trade 20 34,618 36,343 — 70,981 Intercompany payable 280 275,498 57,179 (332,957 ) — Accrued expenses 17,305 11,807 21,208 — 50,320 Income taxes payable — 2,983 434 (2,964 ) 453 Total current liabilities 19,605 324,906 115,164 (335,921 ) 123,754 Long-term debt, less current portion 351,952 19,881 14,000 — 385,833 Other non-current obligations — 25,797 49,095 — 74,892 Deferred income taxes — 2,242 578 — 2,820 Long-term intercompany payable — 67,500 42,516 (110,016 ) — Stockholders’ equity 112,481 551,100 354,090 (905,190 ) 112,481 Total liabilities and stockholders’ equity $ 484,038 $ 991,426 $ 575,443 $ (1,351,127 ) $ 699,780
Condensed Consolidating Statements of Operations	Condensed Consolidating Statements of Operations Fiscal Year Ended March 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Net sales $ — $ 866,163 $ 703,690 $ (835,030 ) $ 734,823 Operating costs and expenses: Cost of sales 1,194 708,143 642,362 (780,156 ) 571,543 Selling, general and administrative expenses 38,071 74,521 43,728 (54,874 ) 101,446 Research and development 79 17,313 7,563 — 24,955 Restructuring charges — 2,564 1,614 — 4,178 Net (gain) loss on sales and disposals of assets (7 ) (484 ) 866 — 375 Total operating costs and expenses 39,337 802,057 696,133 (835,030 ) 702,497 Operating income (loss) (39,337 ) 64,106 7,557 — 32,326 Other (income) expense: Interest income — — (14 ) — (14 ) Interest expense 37,856 1,189 560 — 39,605 Change in value of TOKIN options — 26,300 — — 26,300 Non-operating (income) expense, net (36,183 ) 34,188 (353 ) — (2,348 ) Equity in earnings of subsidiaries 12,619 — — (12,619 ) — Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN (53,629 ) 2,429 7,364 12,619 (31,217 ) Income tax expense (benefit) — (269 ) 6,275 — 6,006 Income (loss) from continuing operations before equity income (loss) from TOKIN (53,629 ) 2,698 1,089 12,619 (37,223 ) Equity income (loss) from TOKIN — (16,406 ) — — (16,406 ) Net income (loss) $ (53,629 ) $ (13,708 ) $ 1,089 $ 12,619 $ (53,629 ) Condensed Consolidating Statements of Operations Fiscal Year Ended March 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Net sales $ — $ 860,428 $ 711,262 $ (813,899 ) $ 757,791 Operating costs and expenses: Cost of sales 1,607 683,103 646,401 (759,432 ) 571,679 Selling, general and administrative expenses 44,447 74,093 43,795 (54,467 ) 107,868 Research and development 323 18,073 9,233 — 27,629 Restructuring charges — 3,901 1,503 — 5,404 Write down of long-lived assets — 4,586 5,693 — 10,279 Net (gain) loss on sales and disposals of assets (299 ) 1,405 (714 ) — 392 Total operating costs and expenses 46,078 785,161 705,911 (813,899 ) 723,251 Operating income (loss) (46,078 ) 75,267 5,351 — 34,540 Other (income) expense: Interest income — 3 (27 ) — (24 ) Interest expense 37,606 1,587 562 — 39,755 Change in value of TOKIN options — (10,700 ) — — (10,700 ) Non-operating (income) expense, net (40,487 ) 40,527 (5,167 ) — (5,127 ) Equity in earnings of subsidiaries (91,186 ) — — 91,186 — Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN 47,989 43,850 9,983 (91,186 ) 10,636 Income tax expense (benefit) — (65 ) 4,355 — 4,290 Income (loss) from continuing operations before equity income (loss) from TOKIN 47,989 43,915 5,628 (91,186 ) 6,346 Equity income (loss) from TOKIN — 41,643 — — 41,643 Net income (loss) $ 47,989 $ 85,558 $ 5,628 $ (91,186 ) $ 47,989 Condensed Consolidating Statements of Operations Fiscal Year Ended March 31, 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Net sales $ 195 $ 978,705 $ 773,504 $ (929,212 ) $ 823,192 Operating costs and expenses: Cost of sales 2,468 823,429 707,493 (869,707 ) 663,683 Selling, general and administrative expenses 41,783 70,074 46,181 (59,505 ) 98,533 Research and development 436 17,588 7,778 — 25,802 Restructuring charges — 3,310 9,707 — 13,017 Net (gain) loss on sales and disposals of assets (10 ) 181 (392 ) — (221 ) Total operating costs and expenses 44,677 914,582 770,767 (929,212 ) 800,814 Operating income (loss) (44,482 ) 64,123 2,737 — 22,378 Other (income) expense: — Interest income — — (15 ) — (15 ) Interest expense 38,632 998 1,071 — 40,701 Change in value of TOKIN options — (2,100 ) — — (2,100 ) Other (income) expense, net (40,903 ) 49,069 (12,248 ) — (4,082 ) Equity in earnings of subsidiaries (27,998 ) — — 27,998 — Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN (14,213 ) 16,156 13,929 (27,998 ) (12,126 ) Income tax expense (benefit) (70 ) 576 4,721 — 5,227 Income (loss) from continuing operations before equity income (loss) from TOKIN (14,143 ) 15,580 9,208 (27,998 ) (17,353 ) Equity income (loss) from TOKIN — (2,169 ) — — (2,169 ) Income (loss) from continuing operations (14,143 ) 13,411 9,208 (27,998 ) (19,522 ) Income (loss) from discontinued operations — 102 5,277 — 5,379 Net income (loss) $ (14,143 ) $ 13,513 $ 14,485 $ (27,998 ) $ (14,143 )
Condensed Statement of Comprehensive Income	Condensed Consolidating Statements of Comprehensive Income (Loss) Fiscal Year Ended March 31, 2016 Comprehensive income (loss) $ (49,918 ) $ (24,832 ) $ 5,873 $ 12,619 $ (56,258 ) Condensed Consolidating Statements of Comprehensive Income (Loss) Fiscal Year Ended March 31, 2015 Comprehensive income (loss) $ (32,103 ) $ 19,650 $ (20,672 ) $ (27,998 ) $ (61,123 ) Condensed Consolidating Statements of Comprehensive Income (Loss) Fiscal Year Ended March 31, 2017 Other comprehensive income (loss) $ 43,875 $ 91,453 $ (6,540 ) $ (91,186 ) $ 37,602
Condensed Consolidating Statements of Cash Flows	Condensed Consolidating Statements of Cash Flows Fiscal Year Ended March 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Sources (uses) of cash and cash equivalents Net cash provided by (used in) operating activities $ 3,722 $ 15,107 $ 13,536 $ — $ 32,365 Investing activities: Capital expenditures — (9,550 ) (10,919 ) — (20,469 ) Change in restricted cash — 1,802 — — 1,802 Proceeds from sale of assets — 248 723 — 971 Acquisitions, net of cash received — (2,892 ) — — (2,892 ) Net cash provided by (used in) investing activities — (10,392 ) (10,196 ) — (20,588 ) Financing activities: Proceeds from revolving line of credit — 8,000 2,000 — 10,000 Payments on revolving line of credit — (9,600 ) — — (9,600 ) Deferred acquisition payments (3,000 ) — — — (3,000 ) Payments of long-term debt — — (481 ) — (481 ) Purchase of treasury stock (722 ) — — — (722 ) Net cash provided by (used in) financing activities (3,722 ) (1,600 ) 1,519 — (3,803 ) Net increase (decrease) in cash and cash equivalents — 3,115 4,859 — 7,974 Effect of foreign currency fluctuations on cash — — 668 — 668 Cash and cash equivalents at beginning of fiscal year 640 33,094 22,628 — 56,362 Cash and cash equivalents at end of fiscal year $ 640 $ 36,209 $ 28,155 $ — $ 65,004 Condensed Consolidating Statements of Cash Flows Fiscal Year Ended March 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Sources (uses) of cash and cash equivalents Net cash provided by (used in) operating activities $ 3,313 $ 34,778 $ 33,576 $ — $ 71,667 Investing activities: Capital expenditures — (10,295 ) (15,322 ) — (25,617 ) Change in restricted cash — — — — — Proceeds from sale of assets — 13 6 — 19 Acquisitions, net of cash received — — — — — Net cash provided by (used in) investing activities — (10,282 ) (15,316 ) — (25,598 ) Financing activities: Proceeds from revolving line of credit — 12,000 — — 12,000 Payments of revolving line of credit — — (12,000 ) — (12,000 ) Deferred acquisition payments — — — — — Proceeds from long-term debt — — 2,314 — 2,314 Payments of long-term debt (1,870 ) — (558 ) — (2,428 ) Proceeds from exercise of stock options 1,133 — — — 1,133 Purchase of treasury stock (1,144 ) — — — (1,144 ) Net cash provided by (used in) financing activities (1,881 ) 12,000 (10,244 ) — (125 ) Net increase (decrease) in cash and cash equivalents 1,432 36,496 8,016 — 45,944 Effect of foreign currency fluctuations on cash — — (1,174 ) — (1,174 ) Cash and cash equivalents at beginning of fiscal year 640 36,209 28,155 — 65,004 Cash and cash equivalents at end of fiscal year $ 2,072 $ 72,705 $ 34,997 $ — $ 109,774 Condensed Consolidating Statements of Cash Flows Fiscal Year Ended March 31, 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Reclassifications and Eliminations Consolidated Sources (uses) of cash and cash equivalents Net cash provided by (used in) operating activities $ 39,575 $ (4,085 ) $ (11,088 ) $ — $ 24,402 Investing activities: Capital expenditures — (12,930 ) (9,302 ) — (22,232 ) Change in restricted cash — 11,509 — — 11,509 Proceeds from sale of assets — 2,403 2,385 — 4,788 Proceeds from sale of discontinued operations — — 9,564 — 9,564 Net cash provided by (used in) investing activities — 982 2,647 — 3,629 Financing activities: Proceeds from revolving line of credit — 37,340 5,000 — 42,340 Payments on revolving line of credit — (22,342 ) (5,000 ) — (27,342 ) Deferred acquisition payments (18,527 ) (1,000 ) — — (19,527 ) Payments of long-term debt (20,417 ) — (1,316 ) — (21,733 ) Proceeds from exercise of stock options 24 — — — 24 Purchase of treasury stock (630 ) — — — (630 ) Net cash provided by (used in) financing activities (39,550 ) 13,998 (1,316 ) — (26,868 ) Net increase (decrease) in cash and cash equivalents 25 10,895 (9,757 ) — 1,163 Effect of foreign currency fluctuations on cash (1 ) (1 ) (2,728 ) — (2,730 ) Cash and cash equivalents at beginning of fiscal year 616 22,200 35,113 — 57,929 Cash and cash equivalents at end of fiscal year $ 640 $ 33,094 $ 22,628 $ — $ 56,362

Subsequent Events (Tables)

Subsequent Events (Tables)	12 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Schedule of gain on sale of business	Net sales and net operating loss from the Company’s discontinued operation for years ended March 31, 2017 , 2016 and 2015 were as follows (in thousands): Fiscal Years Ended March 31, 2017 2016 2015 Net sales $ — $ — $ 104 Operating income (loss) — — (265 ) KEMET's proportionate share of TOKIN's gain on the sale of the EMD business is calculated as follows: Oku-Yen $USD (in millions)* Sales price ¥ 495.8 $ 443.4 Less: Carrying amount of EMD net assets 77.1 69.0 Remove AOCI 5.2 4.6 Transaction related fees and taxes 6.8 6.1 Deferred tax asset 13.8 123.1 Gain on sale 392.9 240.6 KEMET's equity interest 34 % 34 % KEMET's gain on sale (1) ¥ 133.6 $ 81.8 *Utilizing an exchange rate as of March 31, 2017 of 111.82 Japanese Yen to 1.00 U.S. Dollar.

Organization and Significant 46

Organization and Significant Accounting Policies (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2017USD ($)business_group	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Nature of Business and Organization
Number of business groups | business_group									2
Cash Equivalents
Money market accounts	$ 2,055				$ 738				$ 2,055	$ 738
Inventories
Inventory consigned at customer locations	8,800				8,500				8,800	8,500
Property and Equipment
Depreciation									35,000	36,900	$ 38,700
Concentration Risk [Line Items]
Net sales	$ 197,519	$ 188,029	$ 187,308	$ 184,935	$ 183,926	$ 177,184	$ 186,123	$ 187,590	$ 757,791	$ 734,823	$ 823,192
Net sales | Electronics distributor risk
Concentration Risk [Line Items]
Concentration risk, percentage									46.00%	42.00%	45.00%
Net sales | Electronics distributor risk | TTI, Inc.
Concentration Risk [Line Items]
Net sales									$ 104,400	$ 99,300	$ 124,400
Accounts receivable | Credit risk
Concentration Risk [Line Items]
Number of customers whose accounts receivable balances exceeded 10% of gross accounts receivable									0
Concentration risk, percentage									0.00%

Organization and Significant 47

Organization and Significant Accounting Policies - OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (31,425)	$ (28,796)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	5,708	(213)
Other Comprehensive Income, Other, Net of Tax	(4,679)	(2,842)
Other comprehensive income (loss)	10,387	2,629	$ 46,980
Balance at the end of the period	(41,812)	(31,425)	(28,796)
Foreign currency translation gains (losses), net of tax
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(10,272)	(12,132)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	15,284	(1,860)	35,467
Other Comprehensive Income, Other, Net of Tax	0	0
Other comprehensive income (loss)	15,284	(1,860)
Balance at the end of the period	(25,556)	(10,272)	(12,132)
Defined benefit post-retirement plan adjustments
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	1,114	1,159
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(228)	(146)
Amounts reclassified out of OCI	20	(45)	(305)
Other Comprehensive Income, Other, Net of Tax	208	191
Other comprehensive income (loss)	20	45
Balance at the end of the period	1,134	1,114	1,159
Defined benefit pension plans, net of tax
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(15,161)	(20,363)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	536	(3,865)
Amounts reclassified out of OCI	163	5,202	(12,977)
Other Comprehensive Income, Other, Net of Tax	(699)	(1,337)
Other comprehensive income (loss)	163	(5,202)
Balance at the end of the period	(14,998)	(15,161)	(20,363)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0	0
Defined Benefit Pension Plans, tax benefit	700	(300)
Other Comprehensive Income (Loss), Tax	2,700	2,000	2,300
Equity interest in investee's other comprehensive loss
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(6,739)	1,537
Amounts reclassified out of OCI	1,440	(8,276)	766
Other Comprehensive Income, Other, Net of Tax	0	0
Other comprehensive income (loss)	(1,440)	8,276
Balance at the end of the period	(5,299)	(6,739)	1,537
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(367)	1,003
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	8,444	2,618
Other Comprehensive Income, Other, Net of Tax	(5,170)	3,988
Other comprehensive income (loss)	(3,274)	1,370	(1,003)
Balance at the end of the period	$ 2,907	$ (367)	$ 1,003

Organization and Significant 48

Organization and Significant Accounting Policies - Stock Warrant (Details) - Platinum warrant	12 Months Ended
	Mar. 31, 2017$ / sharesshares
Warrant liability
Number of shares subject to a warrant held by K Equity, LLC	8,416,815
Percentage of outstanding common stock at the time of issuance	49.90%
Exercise price of warrants (in dollars per share) | $ / shares	$ 1.05
Maximum [Member]
Warrant liability
Number of shares subject to a warrant held by K Equity, LLC	26,848,484

Organization and Significant 49

Organization and Significant Accounting Policies - Options (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Fair Value Measurement
Money markets	$ 2,055	$ 738
Debt, Long-term and Short-term, Combined Amount	(388,211)	(387,833)
Forward Option Net Asset Liability Fair Value	(9,900)	(20,600)
Fair Value Net Forward Option Asset Liability Measured on Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Change in value of TOKIN options	10,700	(26,300)	$ 2,100
Put Option | NECTOKIN
Fair Value Measurement
Forward Option Net Asset Liability Fair Value	(9,900)	(20,600)
Recurring
Fair Value Measurement
Money markets	2,055	738
Debt, Long-term and Short-term, Combined Amount	(385,251)	(284,261)
Recurring | Level 1
Fair Value Measurement
Money markets	2,055	738
Debt, Long-term and Short-term, Combined Amount	(353,000)	(254,713)
Recurring | Level 1 | Put Option | NECTOKIN
Fair Value Measurement
Forward Option Net Asset Liability Fair Value	0	0
Recurring | Level 2
Fair Value Measurement
Money markets	0	0
Debt, Long-term and Short-term, Combined Amount	(32,251)	(29,548)
Recurring | Level 2 | Put Option | NECTOKIN
Fair Value Measurement
Forward Option Net Asset Liability Fair Value	0	0
Recurring | Level 3
Fair Value Measurement
Money markets	0	0
Debt, Long-term and Short-term, Combined Amount	0	0
Recurring | Level 3 | Put Option | NECTOKIN
Fair Value Net Forward Option Asset Liability Measured on Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Change in value of TOKIN options	10,700	(26,300)	2,100
Other Noncurrent Assets [Member] | Recurring | Level 3 | Put Option | NECTOKIN
Fair Value Measurement
Forward Option Net Asset Liability Fair Value	$ (9,900)	$ (20,600)	$ 5,700

Organization and Significant 50

Organization and Significant Accounting Policies Organization and Significant Accounting Policies - Revenue Recognition (Details)	12 Months Ended
	Mar. 31, 2017
Revenue Recognition [Abstract]
Maximum Percentage of Purchased Inventory that Can be Returned by Distributor	6.00%
Product Warranty Period	1 year
Product Warranty Expense as Percentage of Net Sales Maximum	1.00%

Organization and Significant 51

Organization and Significant Accounting Policies Organization and Significant Accounting Policies - Shipping and Handling (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Shipping and Handling Charges [Abstract]
Shipping, Handling and Transportation Costs	$ 16.4	$ 16.1	$ 17.9

Organization and Significant 52

Organization and Significant Accounting Policies Organization and Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		$ 3,068,000
Total current assets	$ 379,014,000	352,547,000
Total assets	734,528,000	699,780,000
Total long-term debt	386,211,000	385,833,000
Total current liabilities	130,141,000	123,754,000
Deferred income taxes (non-current)	3,370,000	2,820,000
Total liabilities and stockholders’ equity	734,528,000	699,780,000
As Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		5,832,000
Total assets		702,544,000
Total long-term debt		388,597,000
Total liabilities and stockholders’ equity		702,544,000
Accounting Standards Update 2015-03 [Member] | Retrospective Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		(2,764,000)
Total assets		(2,764,000)
Total long-term debt		(2,764,000)
Total liabilities and stockholders’ equity		(2,764,000)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Retained Deficit | Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (130,000)	$ 130,000

Debt - Debt Summary (Details)

Debt - Debt Summary (Details) € in Thousands, $ in Thousands	Apr. 03, 2012USD ($)	Mar. 27, 2012USD ($)	May 05, 2010USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017EUR (€)	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Mar. 31, 2017USD ($)	Feb. 01, 2025EUR (€)	Feb. 01, 2025USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016
Debt Instrument [Line Items]
Document Period End Date								Mar. 31, 2017
Proceeds from Issuance of Debt							$ 33,881				$ 33,881
Debt, Long-term and Short-term, Combined Amount							387,833				388,211
Current maturities							(2,000)				(2,000)
Total long-term debt							385,833				386,211
10.5% Senior Notes
Debt Instrument [Line Items]
Proceeds from Issuance of Debt	$ 15,000	$ 110,000	$ 230,000
Unamortized Debt Issuance Expense							2,800				$ 1,400
Amortization of Financing and Debt Discount							1,000	$ 500
Stated interest rate (as a percent)			10.50%		10.50%						10.50%	10.50%
Total debt							353,952				$ 352,472
Letter of Credit One [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt							33,881				33,881
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt					€ 2,200	$ 2,400
Amortization of Financing and Debt Discount								$ 500
Debt Instrument, Unamortized Discount					€ 500						600
Total debt							$ 0				$ 1,858
Subsequent Event | 10.5% Senior Notes
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				$ 345,000
Scenario, Forecast | Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayment Terms									P8Y	P8Y
Repayments of Other Debt									€ 185	$ 198

Debt - Interest Income and Expe

Debt - Interest Income and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Interest expense
Contractual interest expense	$ 38,825	$ 39,087	$ 38,953
Capitalized interest	(154)	(509)	(237)
Amortization of debt issuance costs	1,390	1,392	1,480
Amortization of debt (premium) discount	(788)	(745)	(407)
Amortization of Acquisition Costs	159	212	741
Capital Leases, Income Statement, Interest Expense	323	168	171
Total interest expense	$ 39,755	$ 39,605	$ 40,701

Debt - Revolving Line of Credit

Debt - Revolving Line of Credit Narrative (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 19, 2014	Sep. 30, 2010	May 05, 2010
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 33,881,000	$ 33,881,000
Proceeds from revolving line of credit	12,000,000	10,000,000	$ 42,340,000
Repayments of line of credit	$ 12,000,000	9,600,000	27,342,000
Guarantor Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions	100.00%
Proceeds from revolving line of credit	$ 12,000,000	8,000,000	37,340,000
Repayments of line of credit	0	9,600,000	$ 22,342,000
US Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	31,881,000	19,881,000
Proceeds from revolving line of credit	12,000,000
Repayments of line of credit	$ 0
Foreign Line of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 30,000,000
Foreign Line of Credit [Member] | LIBOR
Debt Instrument [Line Items]
Stated interest rate (as a percent)	0.00%
Foreign Line of Credit [Member] | Minimum | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	2.25%
Foreign Line of Credit [Member] | Minimum | Base Rate
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.25%
Foreign Line of Credit [Member] | Maximum | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	2.75%
Foreign Line of Credit [Member] | Maximum | Base Rate
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.75%
Foreign Line of Credit [Member] | KEMET Singapore
Debt Instrument [Line Items]
Borrowing base component one, percentage of borrower's accounts receivable that satisfy certain eligibility criteria					85.00%
Domestic Line of Credit [Member]
Debt Instrument [Line Items]
Cash Dominion Trigger Event, Number of days Considered	5 days
Cash Dominion Trigger Event, Availability under credit facility	$ 3,750,000
Required aggregate revolver commitments to maintain fixed charge coverage ratio	$ 3,750,000
Domestic Line of Credit [Member] | Base Rate
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.00%
Spread on variable rate basis (as a percent)	1.50%
Domestic Line of Credit [Member] | Minimum | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	2.00%
Domestic Line of Credit [Member] | Minimum | Base Rate
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.00%
Domestic Line of Credit [Member] | Maximum | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	2.50%
Domestic Line of Credit [Member] | Maximum | Base Rate
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.50%
Domestic Line of Credit [Member] | KEC
Debt Instrument [Line Items]
Borrowing base component one, percentage of borrower's accounts receivable that satisfy certain eligibility criteria					85.00%
Borrowing base component two, fixed amount for determining second component for borrowing base					$ 6,000,000
Borrowing base component two, percentage of net book value of inventory of borrower that satisfies certain eligibility criteria					40.00%
Borrowing base component three, percentage of net orderly liquidation percentage of the appraised value of inventory that satisfies certain eligibility criteria					85.00%
Borrowing base component three, fixed amount for determining second component for borrowing base					$ 5,100,000
Borrowing base component three, percentage of net orderly liquidation percentage of the appraised value of equipment that satisfies certain eligibility criteria					80.00%
Letter of Credit One [Member]
Debt Instrument [Line Items]
Credit facility, remaining borrowing capacity	$ 29,200,000
Line of Credit Facility, Fair Value of Amount Outstanding	$ 33,881,000	33,881,000
10.5% Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	10.50%			10.50%			10.50%
Debt issuance cost, net of amortization	$ 1,400,000	2,800,000
Revolving Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 75,000,000	$ 50,000,000
Line of Credit Facility, Current Borrowing Capacity					60,000,000
Credit facility, remaining borrowing capacity					$ 15,000,000
Cash Dominion Trigger Event, Number of days Considered	5 days
Cash Dominion Trigger Event, Availability under credit facility (as a percent)	12.50%
Cash Dominion Trigger Event, Availability under credit facility	$ 7,500,000
Fixed charge coverage ratio	1
Consecutive period of non occurrence of any condition to maintain fixed charge coverage ratio	45 days
Required aggregate revolver commitments to maintain fixed charge coverage ratio (as a percent)	12.50%
Required aggregate revolver commitments to maintain fixed charge coverage ratio	$ 7,500,000
Debt issuance cost, net of amortization	$ 200,000	200,000
Revolving Line of Credit | Greater than 33.3% and less than 66.6%
Debt Instrument [Line Items]
Unused line fee (as a percent)	0.50%
Revolving Line of Credit | Greater than or equal to 66.6%
Debt Instrument [Line Items]
Unused line fee (as a percent)	0.375%
Revolving Line of Credit | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.00%
Revolving Line of Credit | Maximum | Greater than 33.3% and less than 66.6%
Debt Instrument [Line Items]
Average daily balance as percentage of total revolving commitment	50.00%
Revolving Line of Credit | Maximum | Greater than or equal to 66.6%
Debt Instrument [Line Items]
Average daily balance as percentage of total revolving commitment	50.00%
Revolving Line of Credit | KEMET Singapore
Debt Instrument [Line Items]
Percentage of assets pledged as collateral	100.00%
90 Day Borrowing Term [Member] | Singapore Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0
Proceeds from revolving line of credit	0
Repayments of line of credit	12,000,000
30 Day Borrowing Term [Member] | Singapore Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 2,000,000
30 Day Borrowing Term [Member] | Singapore Facility [Member] | LIBOR
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.375%
Spread on variable rate basis (as a percent)	2.50%
Letter of Credit One [Member] | Singapore Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding		12,000,000
Letter of Credit Two [Member] | Singapore Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding		$ 2,000,000

Debt - 10.5% Senior Notes Narra

Debt - 10.5% Senior Notes Narrative (Details) - USD ($) $ in Thousands	Apr. 03, 2012	Mar. 27, 2012	May 05, 2010	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Debt Instrument [Line Items]
Interest payable				$ 15,603		$ 15,683
10.5% Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)			10.50%	10.50%	10.50%
Proceeds from Issuance of Debt	$ 15,000	$ 110,000	$ 230,000
Net proceeds			$ 222,200
Percentage of capital stock of foreign restricted subsidiaries kept as first priority lien			51.00%
Redemption price upon change of control as a percentage of the principal amount				101.00%
Issue price as percentage of principal amount plus accrued interest		105.50%
Unamortized premium		$ 6,100				3,144
Debt issuance cost, net of amortization				$ 1,400		2,800
Interest payable				$ 15,400		$ 15,500
Effective interest rate (as a percent)				10.20%		10.30%
10.5% Senior Notes | Minimum
Debt Instrument [Line Items]
Minimum percentage of aggregate principal amount held by holders to declare notes due and payable				25.00%

Debt - Annual Cash Maturities (

Debt - Annual Cash Maturities (Details) $ in Thousands	Mar. 31, 2017USD ($)
Annual maturities of debt
2,015	$ 2,000
2,016	353,000
2,017	32,277
2,018	396
2,019	396
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,187
10.5% Senior Notes
Annual maturities of debt
2,015	0
2,016	353,000
2,017	0
2,018	0
2,019	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	0
Revolving Line of Credit
Annual maturities of debt
2,015	2,000
2,016	0
2,017	31,881
2,018	0
2,019	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	0
Other Debt Obligations [Member]
Annual maturities of debt
2,015	0
2,016	0
2,017	396
2,018	396
2,019	396
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 1,187

Debt Debt (Phantom)

Debt Debt (Phantom) $ in Thousands, € in Millions	12 Months Ended
	Mar. 31, 2017EUR (€)	Mar. 31, 2017USD ($)	Dec. 31, 2016	Mar. 31, 2016USD ($)	Sep. 30, 2010	May 05, 2010
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount, Current		$ 0		$ 278
Document Period End Date	Mar. 31, 2017
Debt Instrument, Unamortized Discount (Premium), Net		0		1,716
Interest payable		$ 15,603		15,683
Revolving Line of Credit | LIBOR
Debt Instrument [Line Items]
Spread on variable rate basis (as a percent)	1.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate (as a percent)	10.50%	10.50%	10.50%			10.50%
Interest payable		$ 15,400		15,500
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	€ 0.5	600
Advanced payment from OEM
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount		$ 0		$ 45
KEMET Electronics Corporation [Member] | Domestic Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Borrowing Base Calculation, Orderly Liquidation, Reduction Percentage					0.05%

Restructuring - Narrative (Deta

Restructuring - Narrative (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)employee	Mar. 31, 2015USD ($)workers
Restructuring Cost and Reserve [Line Items]
Document Period End Date	Mar. 31, 2017
Restructuring charges	$ 5,404	$ 4,178	$ 13,017
Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,190	2,375	2,672
Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,214	$ 1,803	10,345
Restructuring and Related Cost, Expected Number of Positions Eliminated | employee		50
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date | employee		24
Solid Capacitors
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,333	$ 1,916	3,297
Film and Electrolytic
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,738	1,714	8,221
Film and Electrolytic | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	600
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	333	548	1,499
FLORIDA | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300
SOUTH CAROLINA | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100
SOUTH CAROLINA | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300
United Kingdom | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	200
Mexico | Solid Capacitors | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	600
Mexico | Solid Capacitors | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300	900	1,900
Mexico | K-Salt [Member] | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100
TENNESSEE | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,900
TENNESSEE | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	400
Europe and Asia [Member] | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			500
Victoria Mexico [Member] | Solid Capacitors | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		400
Victoria Mexico [Member] | Solid Capacitors | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		500
Europe and North America [Member] | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		500	1,100
Europe [Member] | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300		$ 4,100
Europe [Member] | Film and Electrolytic | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		300
SWEDEN | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 300
Italy | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | workers			50
Italy | Film and Electrolytic | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 3,200
Restructuring Reserve, Accrual Adjustment		(1,000)
China | Film and Electrolytic | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		400
China | Film and Electrolytic | Personnel reduction costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		600
Europe North America and Asia [Domain] | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		500
Mexico and Macedonia [Member] | Film and Electrolytic | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			300
Landsberg Germany [Member] | Film and Electrolytic | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 1,100	400
Portugal | Solid Capacitors | Manufacturing and sales office relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,400

Restructuring - Rollforward (De

Restructuring - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Reconciliation of restructuring liability
Costs charged to expense	$ 5,404	$ 4,178	$ 13,017
Personnel reduction costs
Reconciliation of restructuring liability
Balance at the beginning of the period	976	7,239	6,217
Costs charged to expense	2,214	1,803	10,345
Costs paid or settled	(2,130)	(8,273)	(7,995)
Change in foreign exchange	(61)	207	(1,328)
Balance at the end of the period	999	976	7,239
Manufacturing and sales office relocation costs
Reconciliation of restructuring liability
Balance at the beginning of the period	0	0	0
Costs charged to expense	3,190	2,375	2,672
Costs paid or settled	(2,784)	(2,375)	(2,672)
Change in foreign exchange	0	0	0
Balance at the end of the period	406	0	0
Film and Electrolytic
Reconciliation of restructuring liability
Costs charged to expense	3,738	$ 1,714	8,221
Film and Electrolytic | Manufacturing and sales office relocation costs
Reconciliation of restructuring liability
Costs charged to expense	$ 600
Mexico and Macedonia [Member] | Film and Electrolytic | Manufacturing and sales office relocation costs
Reconciliation of restructuring liability
Costs charged to expense			$ 300

Goodwill and Intangible Asset61

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Amortizing Intangibles:
Trademarks	$ 7,207	$ 7,207
Accumulated Amortization	16,953	16,995
Intangible assets	46,734	50,296
Purchased technology, customer relationships and patents
Amortizing Intangibles:
Carrying Amount	39,527	43,089
Accumulated Amortization	$ 16,953	$ 16,995

Goodwill and Intangible Asset62

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Amortizing Intangibles:
Amortization charges	$ 2.1	$ 2.2	$ 2.1
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	2.1
Total amortization	$ 12.1
Purchased technology, customer relationships and patents | Weighted-average
Amortizing Intangibles:
Useful life		16 years 7 months
Finite-Lived Intangible Asset, Weighted Average Period before Next Renewal or Extension	6 months	1 year 6 months

Goodwill and Intangible Asset63

Goodwill and Intangible Assets - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill [Line Items]
Goodwill	$ (40,294)	$ (40,294)
Solid Capacitors
Goodwill [Line Items]
Goodwill	35,584	35,584
Accumulated impairment losses	0	0
Goodwill	(35,584)	(35,584)
Film and Electrolytic
Goodwill [Line Items]
Goodwill	1,092	1,092
Accumulated impairment losses	(1,092)	(1,092)
Goodwill	0	0
Corporate
Goodwill [Line Items]
Goodwill	4,710	4,710
Accumulated impairment losses	0
Goodwill	(4,710)
Goodwill, Acquired During Period	$ 0	$ 4,710

Goodwill and Intangible Asset64

Goodwill and Intangible Assets Goodwill and Intangible Assets (Phantom) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Amortizing Intangibles:
Finite-Lived Intangible Assets, Amortization Expense, Year Two	$ 2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2.1
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 2.1
Purchased technology, customer relationships and patents | Minimum [Member]
Amortizing Intangibles:
Useful life	3 years	3 years
Purchased technology, customer relationships and patents | Maximum
Amortizing Intangibles:
Useful life	18 years	18 years

Investment in NEC TOKIN - Narra

Investment in NEC TOKIN - Narrative (Details) BRL in Thousands, $ in Thousands, ¥ in Millions, TWD in Millions

Jul. 26, 2016USD ($)

Jul. 26, 2016BRL

May 02, 2016USD ($)installmentsuit

Sep. 02, 2015

Feb. 01, 2013USD ($)

Apr. 30, 2015USD ($)number_of_times

Mar. 31, 2017USD ($)item

Mar. 31, 2017JPY (¥)item

Mar. 31, 2017TWDitem

Mar. 31, 2016USD ($)

Mar. 31, 2015USD ($)

Dec. 31, 2016

Mar. 12, 2012director_position

May 05, 2010

Schedule of Equity Method Investments [Line Items]

Gain (loss) on options

$ 10,700

$ (26,300)

$ 2,100

Forward Option Net Asset Liability at Fair Value

$ (9,900)

(20,600)

Document Period End Date

Mar. 31, 2017

Mar. 31, 2017

Mar. 31, 2017

KEC

Schedule of Equity Method Investments [Line Items]

Business Combination, Indemnification Assets, Range of Outcomes, Value, Low

$ (8,500)

NECTOKIN

Schedule of Equity Method Investments [Line Items]

Loss Contingency, Estimate of Possible Loss

83,400

Stockholders Agreement | KEC

Schedule of Equity Method Investments [Line Items]

Receivables balance under agreement

775

748

NECTOKIN

Schedule of Equity Method Investments [Line Items]

Revenue from Related Parties

17,100

21,061

13,500

Related Party Transaction, Purchases from Related Party

8,341

5,912

$ 3,605

Accounts receivable

2,662

5,220

Accounts payable

$ 1,378

$ 1,019

NECTOKIN | KEC

Schedule of Equity Method Investments [Line Items]

Purchase price

$ 54,500

Transaction expenses

4,500

NECTOKIN | Stock Purchase Agreement | KEC

Schedule of Equity Method Investments [Line Items]

Common stock acquired

51.00%

KEMET’s equity ownership %

34.00%

34.00%

34.00%

34.00%

Purchase price paid

50,000

Investment in NEC TOKIN (excludes non cash investment)

$ 50,000

NECTOKIN | Stockholders Agreement

Schedule of Equity Method Investments [Line Items]

Number of director positions | director_position

7

NECTOKIN | Stockholders Agreement | KEC

Schedule of Equity Method Investments [Line Items]

Number of director positions | director_position

4

NECTOKIN | Option Agreement | KEC

Schedule of Equity Method Investments [Line Items]

Common stock acquired

51.00%

Purchase price for expected additional shares that may be acquired

$ 50,000

Economic Ownership, Percentage of Ownership After Transaction

49.00%

LTM EBITDA multiple | number_of_times

6

NECTOKIN | Put Option

Schedule of Equity Method Investments [Line Items]

Forward Option Net Asset Liability at Fair Value

$ (9,900)

$ (20,600)

Level 3 | Recurring | NECTOKIN | Put Option

Schedule of Equity Method Investments [Line Items]

Gain (loss) on options

10,700

(26,300)

$ 2,100

Equity Method Investments | Stockholders Agreement | NECTOKIN

Schedule of Equity Method Investments [Line Items]

Business Combination, Indemnification Assets, Range of Outcomes, Value, Low

(25,000)

Indemnification Agreement | Equity Method Investments

Schedule of Equity Method Investments [Line Items]

Litigation Settlement, Amount

13,800

Indemnification Agreement | Equity Method Investments | NECTOKIN

Schedule of Equity Method Investments [Line Items]

Litigation Settlement, Amount

$ 37,300

Litigation Settlement, Number of Payment Installments | installment

5

Settled Litigation [Member] | Indemnification Agreement | Equity Method Investments

Schedule of Equity Method Investments [Line Items]

Litigation Settlement, Amount

$ 2,300

Litigation Settlement, Payment Period

5 years

Fine, Number of Payments | item

6

6

6

Preliminary Settlement | Indemnification Agreement | Equity Method Investments | NECTOKIN

Schedule of Equity Method Investments [Line Items]

Loss Contingency, Pending Claims, Number | suit

2

Pending Litigation | KEC

Schedule of Equity Method Investments [Line Items]

Loss Contingency, Loss in Period

$ 7,100

TAIWAN, PROVINCE OF CHINA

Schedule of Equity Method Investments [Line Items]

Loss Contingency, Damages Sought, Value

40,200

TWD 1,218.2

TAIWAN, PROVINCE OF CHINA | Minimum

Schedule of Equity Method Investments [Line Items]

Loss Contingency, Damages Sought, Value

20,100

TWD 609.1

JAPAN

Schedule of Equity Method Investments [Line Items]

Litigation Settlement, Amount

$ 1,100

¥ 127.2

BRAZIL | Settled Litigation [Member]

Schedule of Equity Method Investments [Line Items]

Loss Contingency, Damages Paid, Value

$ 200

BRL 601

10.5% Senior Notes

Schedule of Equity Method Investments [Line Items]

Stated interest rate (as a percent)

10.50%

10.50%

10.50%

Other Noncurrent Assets [Member] | Level 3 | Recurring | NECTOKIN | Put Option

Schedule of Equity Method Investments [Line Items]

Forward Option Net Asset Liability at Fair Value

$ (9,900)

(20,600)

$ 5,700

Other Assets [Member] | Level 3 | Recurring | NECTOKIN | Put Option

Schedule of Equity Method Investments [Line Items]

Forward Option Net Asset Liability at Fair Value

$ (20,600)

Investment in NEC TOKIN (Detail

Investment in NEC TOKIN (Details 2) - NECTOKIN - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Summarized financial information
Current assets continuing operations	$ 204,654	$ 199,527
Assets held for sale (current) (1)	118,983	43,146
Noncurrent assets continuing operations	285,952	188,925
Assets held for sale (noncurrent) (1)	0	72,360
Current liabilities continuing operations	375,433	146,207
Liabilities held for sale (current) (1)	50,008	36,078
Noncurrent liabilities continuing operations	65,657	313,768
Liabilities held for sale (noncurrent) (1)	0	21,720
Net sales	328,822	301,898	$ 321,540
Gross profit	74,465	67,409	66,722
Net income (loss) from continuing operations	106,103	(54,575)	(43,085)
Net income (loss) from discontinued operations (1)	22,399	11,580	18,994
Net income (loss)	$ 128,502	$ (42,995)	$ (24,091)

Investment in NEC TOKIN (Deta67

Investment in NEC TOKIN (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 12, 2012
Adjustments:
Equity income (loss) from TOKIN	$ 41,643	$ (16,406)	$ (2,169)
NECTOKIN
Schedule of Equity Method Investments [Line Items]
Net income (loss)	128,502	(42,995)	(24,091)
Equity Method Investment, Equity Income (Loss) Before Adjustments	43,691	(14,618)	(8,191)
Adjustments:
Amortization and depreciation	(2,210)	(1,625)	(2,270)
Equity Method Investment, Indemnity Asset Change	0	0	(8,500)
Equity Method investment, Purchase Price Adjustment, Inventory Profit Elimination	162	(163)	(208)
Equity income (loss) from TOKIN	$ 41,643	$ (16,406)	$ (2,169)
KEMET Electronics Corporation [Member] | Stock Purchase Agreement [Member] | NECTOKIN
Schedule of Equity Method Investments [Line Items]
KEMET’s equity ownership %	34.00%	34.00%	34.00%	34.00%

Investment in NEC TOKIN (Deta68

Investment in NEC TOKIN (Details 4) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
Investment in TOKIN	$ 63,416	$ 20,334
NECTOKIN
Schedule of Equity Method Investments [Line Items]
Investment in TOKIN	63,416	20,334
Purchase price accounting basis adjustment:
Property, plant and equipment (1)	3,080	3,365
Technology (1)	(8,691)	(10,134)
Long-term debt (1)	(1,067)	(1,975)
Goodwill	(7,590)	(7,555)
Equity Method Investment, Indemnity Asset	(8,500)	(8,500)
Equity Method investment, Purchase Price Adjustment, Inventory Profit Elimination	208	371
Other	(569)	(603)
KEMET’s 34% interest of TOKIN’s equity	$ 40,287	$ (4,697)

Investment in NEC TOKIN Investm

Investment in NEC TOKIN Investment in NEC TOKIN - Related Party Transactions (Details) - NEC TOKIN - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 17,100	$ 21,061	$ 13,500
Related Party Transaction, Purchases from Related Party	$ 8,341	$ 5,912	$ 3,605

Segment and Geographic Inform70

Segment and Geographic Information - Narrative (Details)	12 Months Ended
	Mar. 31, 2017USD ($)business_groupmanufacturing_site	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Segment Reporting [Abstract]
Number of business groups | business_group	2
Segment and geographic information
Write down of long-lived assets | $	$ 10,279,000	$ 0	$ 0
Solid Capacitors
Segment and geographic information
Write down of long-lived assets | $	$ 2,076,000
Number of manufacturing sites | manufacturing_site	9
Film and Electrolytic
Segment and geographic information
Number of manufacturing sites | manufacturing_site	9

Segment and Geographic Inform71

Segment and Geographic Information Segment and Geographic Information - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Segment and geographic information
Assets	$ 734,528				$ 699,780				$ 734,528	$ 699,780
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property									(392)	(375)	$ 221
Asset Impairment Charges									10,279	0	0
Restructuring charges									5,404	4,178	13,017
Net sales	197,519	$ 188,029	$ 187,308	$ 184,935	183,926	$ 177,184	$ 186,123	$ 187,590	757,791	734,823	823,192
Operating income (loss)	8,742	$ 13,850	$ 3,050	$ 8,898	8,603	$ 8,493	$ 13,987	$ 1,243	34,540	32,326	22,378
Depreciation and amortization									37,338	39,016	40,768
Additions to Other Assets, Amount									25,617	20,469	22,232
Solid Capacitors [Member]
Segment and geographic information
Assets	439,281				424,659				439,281	424,659
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property									(227)	(536)	(606)
Asset Impairment Charges										0	0
Restructuring charges									1,333	1,916	3,297
Net sales									575,110	556,303	621,275
Operating income (loss)									146,694	129,909	135,946
Depreciation and amortization									20,824	21,318	21,202
Additions to Other Assets, Amount									12,300	10,098	12,552
Film and Electrolytic
Segment and geographic information
Assets	204,407				234,822				204,407	234,822
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property									(136)	270	1,008
Asset Impairment Charges									8,200	0	0
Restructuring charges									3,738	1,714	8,221
Net sales									182,681	178,520	201,917
Operating income (loss)									(8,278)	(71)	(16,685)
Depreciation and amortization									10,953	11,984	13,886
Additions to Other Assets, Amount									7,955	5,902	7,752
Corporate
Segment and geographic information
Assets	$ 90,840				$ 40,299				90,840	40,299
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property									(29)	(109)	(181)
Restructuring charges									333	548	1,499
Operating income (loss)									(103,876)	(97,512)	(96,883)
Depreciation and amortization									5,561	5,714	5,680
Additions to Other Assets, Amount									$ 5,362	$ 4,469	$ 1,928

Segment and Geographic Inform72

Segment and Geographic Information - Net Sales by Country (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales	$ 197,519	$ 188,029	$ 187,308	$ 184,935	$ 183,926	$ 177,184	$ 186,123	$ 187,590	$ 757,791	$ 734,823	$ 823,192
Property, plant and equipment, net	209,311				241,839				209,311	241,839
Solid Capacitors
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									575,110	556,303	621,275
Film and Electrolytic
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									$ 182,681	178,520	201,917
Net sales | Film and Electrolytic
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration Risk, Customer									0
Net sales | Sales risk
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration Risk, Customer									1
Concentration Risk, Geographic									No
Net sales									$ 104,400	99,300	124,400
Net sales | Sales risk | Solid Capacitors
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration Risk, Customer									1
Net sales									$ 89,400	85,300	109,100
Net sales | Sales risk | Film and Electrolytic
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration Risk, Customer									1
Net sales										14,000	15,300
Net sales | Geographic risk
Net sales and property, plant and equipment, goodwill, intangible assets
Threshold for Disclosure Percentage									3.00%
Property, Plant and Equipment [Member] | Geographic risk
Net sales and property, plant and equipment, goodwill, intangible assets
Threshold for Disclosure Percentage									3.20749%
United States
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									$ 198,250	201,878	238,840
Property, plant and equipment, net	46,387				54,658				46,387	54,658
Hong Kong
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									121,813	133,117	131,109
Germany
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									104,755	83,589	107,859
Europe [Member]
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									64,316	57,362	58,879
China
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									71,223	65,043	65,289
Property, plant and equipment, net	23,780				26,705				23,780	26,705
Asia Pacific [Member]
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									54,767	61,414	62,864
United Kingdom
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									33,837	28,083	32,127
Netherlands
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									32,478	31,218	38,853
Singapore
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									15,565	16,260	22,516
Italy
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									15,376	14,391	19,013
Property, plant and equipment, net	36,108				44,699				36,108	44,699
Hungary
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									18,856	17,766	22,745
Mexico
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									22,424	23,041	21,164
Property, plant and equipment, net	55,878				61,859				55,878	61,859
Other (1)
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									4,131	1,661	1,934
Property, plant and equipment, net	7,331				9,462				7,331	9,462
PORTUGAL
Net sales and property, plant and equipment, goodwill, intangible assets
Property, plant and equipment, net	21,637				23,449				21,637	23,449
MACEDONIA, THE FORMER YUGOSLAV REPUBLIC OF
Net sales and property, plant and equipment, goodwill, intangible assets
Property, plant and equipment, net	12,339				14,131				12,339	14,131
SWEDEN
Net sales and property, plant and equipment, goodwill, intangible assets
Property, plant and equipment, net	5,851				6,876				5,851	6,876
Non-US [Member]
Net sales and property, plant and equipment, goodwill, intangible assets
Net sales									559,541	532,945	$ 584,352
Property, plant and equipment, net	$ 162,924				$ 187,181				$ 162,924	$ 187,181
Minimum | Net sales | Sales risk
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration risk, percentage									0.00%
Minimum | Net sales | Sales risk | Solid Capacitors
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration risk, percentage									0.00%
Minimum | Net sales | Sales risk | Film and Electrolytic
Net sales and property, plant and equipment, goodwill, intangible assets
Concentration risk, percentage									0.00%

Discontinued Operations Disco73

Discontinued Operations Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net sales and net operating (loss) from discontinued operations
Net sales		$ 5,600
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		300
Operating income (loss)	$ 0	0	$ 5,379
Machinery Division [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue	0	0	104
Net sales and net operating (loss) from discontinued operations
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	$ 0	$ 0	$ (265)

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($) $ in Thousands, number in Millions	Jun. 03, 2015	Apr. 01, 2015	Dec. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Acquisitions
Acquisitions, net of cash received				$ 0	$ 2,892	$ 0
Goodwill				$ 40,294	$ 40,294
Intellidata [Member]
Acquisitions
Business Acquisition, Percentage of Voting Interests Acquired		0.00%
Payments to Acquire Businesses, Gross		$ 6,000
Working capital adjustment		100
Business Combination, Cost Of Acquired Entity, Purchase Price		6,100
Acquisitions, net of cash received		3,000
Installment payment	$ 100		$ 3,000
Goodwill		4,710
Intangible assets		1,820
Intellidata [Member] | Developed technology
Acquisitions
Intangible assets		$ 1,820

Acquisitions - Assets Acquired

Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Apr. 01, 2015
Allocations of the aggregate purchase price
Goodwill	$ 40,294	$ 40,294
Intellidata [Member]
Allocations of the aggregate purchase price
Cash			$ 233
Accounts receivable			10
Other current assets			6
Property, plant and equipment			3
Goodwill			4,710
Intangible assets			1,820
Current liabilities			(9)
Deferred income taxes			(648)
Total net assets acquired			$ 6,125

Acquisitions - Intangible Asset

Acquisitions - Intangible Assets (Details) - Intellidata [Member] $ in Thousands	Apr. 01, 2015USD ($)
Schedule of the amounts assigned to intangible assets
Fair Value	$ 1,820
Developed technology
Schedule of the amounts assigned to intangible assets
Fair Value	$ 1,820
Useful Life (years)	10 years

Impairment Charges Impairment C

Impairment Charges Impairment Charges - Narrative (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Write down of long-lived assets	$ 10,279,000	$ 0	$ 0
Asset Impairment Charges	$ 10,279,000	0	0
Document Period End Date	Mar. 31, 2017
Solid Capacitors
Property, Plant and Equipment [Line Items]
Write down of long-lived assets	$ 2,076,000
Asset Impairment Charges		0	0
Film and Electrolytic
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	8,200,000	$ 0	$ 0
TENNESSEE | Film and Electrolytic
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	4,100,000
Impairment of Long-Lived Assets to be Disposed of	3,000,000
Impairment of Intangible Assets (Excluding Goodwill)	1,100,000
Italy | Film and Electrolytic
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	4,100,000
Facility Closing [Member] | Solid Capacitors
Property, Plant and Equipment [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	700,000
Facility Closing [Member] | Mexico | Solid Capacitors
Property, Plant and Equipment [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 600,000
Basic [Member] | Solid Capacitors
Property, Plant and Equipment [Line Items]
Impairment Effect on Earnings Per Share, Pretax	$ 0.04
Basic [Member] | Film and Electrolytic
Property, Plant and Equipment [Line Items]
Impairment Effect on Earnings Per Share, Pretax	0.18
Diluted [Member] | Solid Capacitors
Property, Plant and Equipment [Line Items]
Impairment Effect on Earnings Per Share, Pretax	0.04
Diluted [Member] | Film and Electrolytic
Property, Plant and Equipment [Line Items]
Impairment Effect on Earnings Per Share, Pretax	$ 0.15

Impairment Charges Impairment78

Impairment Charges Impairment Charges (Phantom) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Write down of long-lived assets	$ 10,279,000	$ 0	$ 0

Pension and Other Post-retire79

Pension and Other Post-retirement Benefit Plans - Narrative (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2017USD ($)plan	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | plan	9
Gains net of the employer matches related to the deferred compensation plan	$ 176	$ 5	$ 115
Total benefits accrued	1,800	1,500
Matched contribution of the entity	$ 2,400	2,100	$ 2,200
Maximum
Defined Benefit Plan Disclosure [Line Items]
Company matched contribution (as a percent)	6.00%
Landsberg Germany [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Curtailments		$ 700
Pension
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Gain (Loss)	$ 362
Pension | Europe
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | plan	6
Pension | Singapore
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | plan	1
Pension | Mexico
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | plan	2
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Gain (Loss)	$ 188
Number of defined benefit plans | plan	2

Pension and Other Post-retire80

Pension and Other Post-retirement Benefit Plans - Summary of Change in Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2017	Mar. 31, 2016
Pension
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Net Periodic Benefit Cost Recurring Activity	$ 2,750	$ 3,185	$ 2,900
Change in Benefit Obligation
Benefit obligation at beginning of the year	45,716	49,342
Service cost	1,298	1,507	1,286
Interest cost	1,297	1,347	1,819
Plan participants’ contributions	0	0
Plan amendments	0	342
Actuarial (gain) loss	1,980	(4,922)
Foreign currency exchange rate change	(3,732)	221
Gross benefits paid	(1,120)	(1,425)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	(268)	(696)
Benefit obligation at end of year	45,171	45,716	49,342
Change in Plan Assets
Fair value of plan assets at beginning of year	10,268	10,483
Actual return on plan assets	1,099	(46)
Foreign currency exchange rate changes	(1,361)	(242)
Employer contributions	1,176	1,528
Settlements	(58)	(30)
Plan participants’ contributions	0	0
Gross benefits paid	(1,120)	(1,425)
Fair value of plan assets at end of year	10,004	10,268	10,483
Funded status at end of year
Fair value of plan assets	10,268	10,483	10,483	$ 10,004	$ 10,268
Benefit obligations	(45,716)	(49,342)	(49,342)	(45,171)	(45,716)
Amount recognized at end of year				(35,167)	(35,448)
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	1,600
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Net Periodic Benefit Cost Recurring Activity	(196)	(172)	(158)
Change in Benefit Obligation
Benefit obligation at beginning of the year	623	846
Service cost	0	0	0
Interest cost	11	19	29
Plan participants’ contributions	592	464
Plan amendments	0	0
Actuarial (gain) loss	(228)	(146)
Foreign currency exchange rate change	0	0
Gross benefits paid	(612)	(560)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0
Benefit obligation at end of year	386	623	846
Change in Plan Assets
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Foreign currency exchange rate changes	0	0
Employer contributions	20	96
Settlements	0	0
Plan participants’ contributions	592	464
Gross benefits paid	(612)	(560)
Fair value of plan assets at end of year	0	0	0
Funded status at end of year
Fair value of plan assets	0	0	0	0	0
Benefit obligations	(623)	$ (846)	$ (846)	(386)	(623)
Amount recognized at end of year				$ (386)	$ (623)
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	$ 53

Pension and Other Post-retire81

Pension and Other Post-retirement Benefit Plans - Amounts in Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Accumulated Other Comprehensive Income (Loss) Tax	$ 2,700	$ 2,000
Pension
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Gain (Loss)	362
Amounts recognized in the Consolidated Balance Sheets
Current liability	(827)	(833)
Noncurrent liability	(34,340)	(34,615)
Amount recognized, end of year	(35,167)	(35,448)
Accumulated other comprehensive income (loss)
Net actuarial loss (gain)	16,196	15,585
Prior service cost	1,500	1,582
Accumulated other comprehensive (income) loss	17,696	17,167
Components of benefit costs (credit)
Net service cost	1,298	1,507	$ 1,286
Interest cost	1,297	1,347	1,819
Expected return on plan assets	(346)	(433)	(499)
Amortization:
Actuarial (gain) loss	419	704	277
Prior service cost	82	60	17
One time expense (income)	(11)	0	0
Net periodic benefit cost (credit)	2,739	3,185	2,900
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	80
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Gain (Loss)	188
Amounts recognized in the Consolidated Balance Sheets
Current liability	(52)	(82)
Noncurrent liability	(334)	(541)
Amount recognized, end of year	(386)	(623)
Accumulated other comprehensive income (loss)
Net actuarial loss (gain)	(1,134)	(1,114)
Prior service cost	0	0
Accumulated other comprehensive (income) loss	(1,134)	(1,114)
Components of benefit costs (credit)
Net service cost	0	0	0
Interest cost	11	19	29
Expected return on plan assets	0	0	0
Amortization:
Actuarial (gain) loss	(207)	(191)	(187)
Prior service cost	0	0	0
One time expense (income)	0	0	0
Net periodic benefit cost (credit)	$ (196)	$ (172)	$ (158)

Pension and Other Post-retire82

Pension and Other Post-retirement Benefit Plans - Benefit Schedules (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Number of Fiscal Years	10 years
Target allocation and weighted-average asset allocations
Target Allocation (as a percent)	100.00%
Plan Assets (as a percent)	100.00%
Estimated future pension benefit payments
2,015	$ 1,520
2,016	1,612
2,017	1,666
2,018	1,627
2,019	1,690
2021- 2025	11,230
Pension
Other changes in plan assets and benefit obligations recognized in Accumulated other comprehensive income
Current year actuarial (gain) loss	1,229	$ (5,125)	$ 12,397
Amortization of actuarial gain (loss)	(619)	(698)	(258)
Current year prior service cost	0	342	1,006
Amortization of prior service cost	(82)	(60)	(17)
Total recognized in other comprehensive income	528	(5,541)	13,128
Total recognized in net periodic benefit cost and other comprehensive income (loss)	3,267	(2,356)	16,028
Estimated future pension benefit payments
2,015	1,467
2,016	1,562
2,017	1,619
2,018	1,584
2,019	1,651
2021- 2025	11,090
Other Benefits
Other changes in plan assets and benefit obligations recognized in Accumulated other comprehensive income
Current year actuarial (gain) loss	(228)	(146)	118
Amortization of actuarial gain (loss)	208	191	187
Current year prior service cost	0	0	0
Amortization of prior service cost	0	0	0
Total recognized in other comprehensive income	(20)	45	305
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(216)	$ (127)	$ 147
Estimated future pension benefit payments
2,015	53
2,016	50
2,017	47
2,018	43
2,019	39
2021- 2025	$ 140
Insurance
Target allocation and weighted-average asset allocations
Target Allocation (as a percent)	10.00%
Plan Assets (as a percent)	6.00%
International equities
Target allocation and weighted-average asset allocations
Target Allocation (as a percent)	15.00%
Plan Assets (as a percent)	18.00%
International bonds
Target allocation and weighted-average asset allocations
Target Allocation (as a percent)	60.00%
Plan Assets (as a percent)	63.00%
Other
Target allocation and weighted-average asset allocations
Target Allocation (as a percent)	15.00%
Plan Assets (as a percent)	13.00%

Pension and Other Post-retire83

Pension and Other Post-retirement Benefit Plans - Weighted Average Assumptions (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Pension
Projected benefit obligation:
Discount rate	3.10%	3.20%
Rate of compensation increase	3.50%	3.40%
Net periodic benefit cost:
Discount rate	3.10%	2.80%
Rate of compensation increase	3.50%	3.50%
Expected return on plan assets	3.20%	4.00%
Other Benefits
Projected benefit obligation:
Discount rate	3.20%	2.80%
Rate of compensation increase	0.00%	0.00%
Net periodic benefit cost:
Discount rate	2.80%	2.90%
Rate of compensation increase	0.00%	0.00%
Expected return on plan assets	0.00%	0.00%
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	$ 0	$ 0
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	0	6,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	0	0
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	$ 0	$ 6,000

Pension and Other Post-retire84

Pension and Other Post-retirement Benefit Plans - Fair Value (Details) - Pension - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 10,004	$ 10,268	$ 10,483
Actual return on plan assets	1,099	(46)
Employer contributions	1,176	1,528
Settlements	(58)	(30)
Benefits paid	(1,120)	(1,425)
Foreign currency exchange rate change	(1,361)	(242)
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	129
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,760	1,567
International bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,275	6,469
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	580	611
Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,303	1,492
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	129
Level 1 | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	129
Level 1 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 | International bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,338	9,528
Level 2 | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,760	1,567
Level 2 | International bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,275	6,469
Level 2 | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 | Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,303	1,492
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	580	611	$ 576
Actual return on plan assets	20	14
Employer contributions	198	189
Benefits paid	(211)	(202)
Foreign currency exchange rate change	(38)	34
Level 3 | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | International bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 580	$ 611

Pension and Other Post-retire85

Pension and Other Post-retirement Benefit Plans Pension and Other Post-retirement Benefit Plans (Phantom) - Other Benefits	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Health Care Cost Trend Rate on Covered Charges	7.00%	7.00%
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Ultimate Health Care Cost Trend Rate	5.00%	5.00%
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Health Care Cost Trend Rate on Covered Charges	7.00%	7.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%

Stock-Based Compensation - Expe

Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
LTIPs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2,528	$ 2,619	$ 2,901
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	42	163	552
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2,150	1,992	1,059
Cost of sales | LTIPs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	729	720	1,075
Cost of sales | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	21	81	233
Cost of sales | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	634	617	269
Selling, general and administrative expenses | LTIPs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,620	1,732	1,547
Selling, general and administrative expenses | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	20	78	306
Selling, general and administrative expenses | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,490	1,352	787
Research and development | LTIPs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	179	167	279
Research and development | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1	4	13
Research and development | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 26	$ 23	$ 3

Stock-Based Compensation - Empl

Stock-Based Compensation - Employee Stock Options Narrative (Details) - Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Jan. 27, 2010	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 0	$ 2.72	$ 2.73
Shares authorized for grant		7,400
Expiration period		10 years
Options, Outstanding		964	1,254
Options, Outstanding, Weighted Average Exercise Price		$ 7.27	$ 7.63
Options, Granted in Period		0
Options, Grants in Period, Weighted Average Exercise Price		$ 0	0	0
Options, Exercises in Period		204
Options, Exercises in Period, Weighted Average Exercise Price		$ 5.55
Options, Forfeitures in Period		0
Options, Forfeitures in Period, Weighted Average Exercise Price		$ 0
Options, Expirations in Period		86
Options, Expirations in Period, Weighted Average Exercise Price		$ 16.72
Options, Exercisable, Number		964
Options, Exercisable, Weighted Average Exercise Price		$ 7.27
Options, Exercisable, Weighted Average Remaining Contractual Term		4 years 1 month 6 days
Options, Outstanding, Weighted Average Remaining Contractual Term		4 years 1 month 6 days
Options, Vested in Period, Weighted Average Grant Date Fair Value		$ 2.72	2.73	3.50
Options, Forfeited and Vested in Period, Weighted Average Grant Date Fair Value		$ 2.72	$ 2.81	$ 3.25
Options, Vested in Period, Fair Value		$ 223	$ 548	$ 1,000
Options, Exercises in Period, Intrinsic Value		890	$ 0	$ 0
Options, Outstanding, Intrinsic Value		5,272
Options, Exercisable, Intrinsic Value		5,272
Nonvested Awards, Compensation Not yet Recognized, Stock Options		$ 0
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Chief executive officer | Awards that vest on June 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
Chief executive officer | Awards that vest on June 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2011 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant		6,600
Prior Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant		800

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Grants Valuation (Details)	12 Months Ended
	Mar. 31, 2017
Minimum | Stock Options
Assumptions:
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	100.00%

Stock-Based Compensation Stock-

Stock-Based Compensation Stock-Based Compensation - Performance Vesting Stock Options (Details) - $ / shares	Mar. 04, 2010	Mar. 31, 2006	Mar. 31, 2017
Chief executive officer | Stock Options with Performance Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Exercises in Period	83,333	166,667
Options, Exercises in Period, Weighted Average Exercise Price		$ 24.15
Fair Value Assumptions Expected Term after Vesting		10 years
Concurrent Grant or Replacement Award in Period	0
Long Term Incentive Plan 2016 2017 [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options			171,000
Long Term Incentive Plan 2016 2017 [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options			171,000
Long Term Incentive Plan 2014 2015 [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options			73,000
Long Term Incentive Plan 2015 2016 [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options			103,000
Long Term Incentive Plan 2015 2016 [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options			102,000

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Units (Details) - Restricted Stock - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Shares
Non-vested restricted stock at the beginning of the period (in shares)	1,430
Granted (in shares)	386
Vested (in shares)	(409)
Forfeited (in shares)	(25)
Non-vested restricted stock at the end of the period (in shares)	1,382
Weighted-average Fair Value on Grant Date
Non-vested restricted stock at the beginning of the period (in dollars per share)	$ 3.51
Granted (in dollars per share)	4.91
Vested (in dollars per share)	3.18
Forfeited (in dollars per share)	3.39
Non-vested restricted stock at the end of the period (in dollars per share)	$ 4
Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 2.7	$ 3
Director [Member]
Weighted-average Fair Value on Grant Date
Vesting period	1 year
Officer [Member]
Weighted-average Fair Value on Grant Date
Vesting period	3 years
Chief executive officer
Weighted-average Fair Value on Grant Date
Period of restriction for sale of shares	90 days

Stock-Based Compensation - Long

Stock-Based Compensation - Long-term Incentive Plans (Details) shares in Thousands	12 Months Ended
	Mar. 31, 2017shares
LTIPs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Award, Terms of Award	P2Y
Long Term Incentive Plan 2017 2018 [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Vested and Expected to Vest, Outstanding, Number	198
Long Term Incentive Plan 2017 2018 [Member] | Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Vested and Expected to Vest, Outstanding, Number	198
Long Term Incentive Plan 2017 2018 [Member] | Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Vested and Expected to Vest, Outstanding, Number	204
Long Term Incentive Plan 2016 2017 [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Vested and Expected to Vest, Outstanding, Number	187
Long Term Incentive Plan 2016 2017 [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	171
Options, Vested and Expected to Vest, Outstanding, Number	186
Long Term Incentive Plan 2016 2017 [Member] | Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	171
Options, Vested and Expected to Vest, Outstanding, Number	191
Long Term Incentive Plan 2015 2016 [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	103
Options, Vested and Expected to Vest, Outstanding, Number	111
Long Term Incentive Plan 2015 2016 [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	102
Options, Vested and Expected to Vest, Outstanding, Number	113
Long Term Incentive Plan 2015 2016 [Member] | Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Vested and Expected to Vest, Outstanding, Number	0
Long Term Incentive Plan 2014 2015 [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	73
Options, Vested and Expected to Vest, Outstanding, Number	130
Long Term Incentive Plan 2014 2015 [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Vested and Expected to Vest, Outstanding, Number	0

Income Taxes - Provision (Benef

Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Components of Income (loss) before income taxes
Domestic (U.S.)	$ 653	$ (38,581)	$ (26,238)
Foreign (Outside U.S.)	9,983	7,364	14,112
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN	10,636	(31,217)	(12,126)
Current:
Federal	0	0	0
State and local	62	95	(92)
Foreign	4,247	5,416	7,403
Total current income tax expense from continuing operations	4,309	5,511	7,311
Deferred:
Federal	(6)	(647)	270
State and local	(97)	172	39
Deferred Foreign Income Tax Expense (Benefit)	84	970	(2,393)
Deferred tax expense (benefit) from continuing operations	(19)	495	(2,084)
Provision for income taxes	4,290	6,006	5,227
Latest Tax Year [Member]
Deferred:
Deferred Foreign Income Tax Expense (Benefit)	$ 1,200	$ 1,400	$ (2,100)

Income Taxes - Provision (Ben93

Income Taxes - Provision (Benefit) For Income Taxes Differences (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Contingency [Line Items]
Federal Statutory Income Tax Rate, Amount	$ 3,722	$ (10,926)	$ (4,245)
Change in Domestic Deferred Tax Assets Valuation Allowance	(7,080)	4,099	(19,691)
Effective Income Tax Rate Reconciliation, Undistributed Earnings of Foreign Subsidiaries	2,127	(231)	18,502
Other Adjustments, Amount	1,789	(286)	5,766
Expired foreign tax credits	4,766	0	0
Effect of Business Combination	0	(648)	0
Foreign Income Tax Rate Differential, Amount	1,835	2,415	4,660
Change in Domestic Deferred Tax Assets Option Valuation	(3,745)	7,381	0
Nondeductible Expense, Other, Amount	(937)	126	217
State and Local Income Taxes, Amount	(35)	267	(53)
Tax Contingency, Foreign, Amount	108	998	1,119
Change in Foreign Tax Law Valuation Allowance	144	981	0
Change in Foreign Deferred Tax Assets Valuation Allowance	983	(200)	1,378
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	613	2,030	(2,426)
Provision for income taxes	4,290	6,006	5,227
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation	$ 900	600
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation			(3,400)
China
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent	25.00%
Mexico
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent	30.00%
China and Mexico [Member]
Income Tax Contingency [Line Items]
Provision for income taxes	$ 3,100	$ 3,200	$ 6,400

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred tax assets:
Net operating loss carry forwards	$ 165,161	$ 173,041
Sales allowances and inventory reserves	14,910	16,918
Tax credits	16,336	11,234
Medical and employee benefits	4,954	9,840
Stock-based compensation	2,501	2,576
Other	2,357	2,988
Total deferred tax assets before valuation allowance	206,219	216,597
Less valuation allowance	(163,898)	(170,917)
Total deferred tax assets	42,321	45,680
Deferred tax liabilities:
Undistributed Earnings of Foreign Subsidiaries	(20,265)	(18,271)
Depreciation and differences in basis	(7,576)	(11,718)
Amortization of intangibles and debt discounts	(6,207)	(7,107)
Non-amortized intangibles	(2,549)	(2,556)
Other	(501)	(451)
Total deferred tax liabilities	(37,098)	(40,103)
Net deferred tax assets	$ 5,223	$ 5,577

Income Taxes - Valuation Allowa

Income Taxes - Valuation Allowance for Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Annual activities included in the deferred tax valuation allowance
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 7,000	$ 3,300	$ 21,700
Expired foreign tax credits	$ 4,766	0	0
Deferred Tax Assets Period of Cumulative Loss for Determination of Full Valuation Allowance	3 years
Deferred income taxes	$ 5,577	5,577
Change in net deferred income tax asset (liability)
Balance at the beginning of the period	5,577
Deferred income taxes related to continuing operations	19
Deferred Income Taxes Related to Business Combination	0
Deferred income taxes related to other comprehensive income	181
Foreign currency translation	(554)
Balance at the end of the period	5,223	5,577
Valuation Allowance for Deferred Tax Assets
Annual activities included in the deferred tax valuation allowance
Balance at the beginning of the period	170,917	167,594	189,276
Charge to costs and expenses	(2,094)	4,072	(19,900)
Deductions	(4,925)	(749)	(1,782)
Balance at the end of the period	163,898	$ 170,917	$ 167,594
Domestic Tax Authority [Member]
Annual activities included in the deferred tax valuation allowance
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 1,200
Other Information Pertaining to Income Taxes	29.8

Income Taxes - NOL and Tax Cred

Income Taxes - NOL and Tax Credits (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2017USD ($)
U.S. research credits
Tax credit carryforwards
Tax credits	$ 1,425
Tax Credit Carryforward, Expiration Date	Mar. 31, 2023
Texas franchise tax credits
Tax credit carryforwards
Tax credits	$ 3,122
Tax Credit Carryforward, Expiration Date	Mar. 31, 2026
Foreign Tax Authority [Member]
Tax credit carryforwards
Operating Loss Carryforwards	$ 48,600
Operating Loss Carryforwards Subject to Expiration within One Year	4,800
Tax credits	$ 407
Tax Credit Carryforward, Expiration Date	Mar. 31, 2018
Macedonia
Tax credit carryforwards
Income Tax Expense (Benefit)	$ 0
Domestic Tax Authority [Member]
Tax credit carryforwards
Operating Loss Carryforwards	399,900
State and Local Jurisdiction [Member]
Tax credit carryforwards
Operating Loss Carryforwards	515,800
Operating Loss Carryforwards Subject to Expiration within One Year	$ 5,200
Operating Loss Carryforwards, Expiration Period	1 year

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Reconciliation of gross unrecognized tax benefits (excluding interest and penalties)
Beginning of fiscal year	$ 7,103	$ 6,377	$ 5,691
Additions for tax positions of the current year	762	763	1,115
Reductions for tax positions of prior years	(64)	0	(56)
Lapse in statute of limitations	(411)	(10)	(203)
Settlements	0	(27)	(170)
End of fiscal year	7,390	7,103	$ 6,377
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,700
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	2,300
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 200	$ 400

Derivatives Hedging Foreign Cur

Derivatives Hedging Foreign Currencies (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Foreign Exchange Forward
Derivatives, Fair Value [Line Items]
Derivative asset, as presented		$ 367,000
Derivative liability, as presented	$ 2,907,000
Derivative liability, offset	0
Derivative asset, offset		0
Derivative asset, gross		(367,000)
Derivative liability, gross	2,907,000
Foreign Exchange Forward | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, as presented	(2,907,000)	0
Derivative asset, offset	40,000	523,000
Derivative asset, gross	2,947,000	523,000
Foreign Exchange Forward | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liability, as presented	0	(367,000)
Derivative liability, offset	(40,000)	(523,000)
Derivative liability, gross	(40,000)	(890,000)
Euro Member Countries, Euro
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0
Mexico, Pesos
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	49,100,000	37,700,000
Japan, Yen
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0
Sales Revenue, Net [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(789,000)
Cost of sales
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	5,170,000	3,199,000
Operating Expense [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	5,170,000	3,199,000
Operating Income (Loss) [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (5,170,000)	$ (3,988,000)	$ 0

Supplemental Balance Sheets a99

Supplemental Balance Sheets and Statements of Operations - Trade Accounts Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accounts receivable:
Trade	$ 112,940	$ 116,146
Allowance for doubtful accounts reserve	(942)	(1,002)
Ship-from-stock and debit reserve	(15,489)	(17,362)
Returns reserves	(2,913)	(3,324)
Rebates reserves	(564)	(872)
Price protection reserves	(506)	(418)
Accounts receivable	92,526	93,168
Allowance for commitments related to accounts receivables
Changes in allowance for accounts receivable and inventory reserve
Balance at the beginning of the period	22,978	24,647	$ 24,660
Costs charged to expense	87,317	95,212	91,091
Actual adjustments applied	(89,762)	(96,932)	(90,909)
Other	(119)	51	(195)
Balance at the end of the period	$ 20,414	$ 22,978	$ 24,647

Supplemental Balance Sheets 100

Supplemental Balance Sheets and Statements of Operations Detail Supplemental Balance Sheets and Statements of Operations - Inventory and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 65,750	$ 80,289
Inventory, Work in Process, Gross	47,408	46,631
Inventory, Finished Goods, Gross	50,738	58,060
Inventory, Gross	163,896	184,980
Inventory Valuation Reserves	15,941	16,101
Inventory, Net	147,955	168,879
Inventory Valuation Reserve [Member]
Inventory [Line Items]
Balance at the beginning of the period	16,101	17,499	$ 26,826
Charged to Cost and Expense	6,163	5,696	9,291
Deductions	6,125	7,326	17,520
Other	(198)	232	(1,098)
Balance at the end of the period	$ 15,941	$ 16,101	$ 17,499

Supplemental Balance Sheets 101

Supplemental Balance Sheets and Statements of Operations - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,030,587	$ 1,057,177
Accumulated depreciation	(821,276)	(815,338)
Property, plant and equipment	209,311	241,839
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	21,642	22,380
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	140,895	148,805
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	783,288	793,250
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	68,706	69,442
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,653	21,197
Other Capitalized Property Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,403	$ 2,103

Supplemental Balance Sheets 102

Supplemental Balance Sheets and Statements of Operations - Other Expenses and Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accrued expenses:
Salaries, wages, and related employee costs	$ 29,589	$ 20,708
Interest	15,603	15,683
Restructuring	984	946
Accrued Vacation, Current	7,524	7,892
Other	4,052	5,091
Total accrued expenses	57,752	50,320
Other non-current obligations:
Pension plans	34,674	35,156
Employee separation liability	8,685	9,352
Deferred Compensation Liability, Classified, Noncurrent	1,774	1,544
Purchase Obligation	898	1,349
Restructuring	15	30
Option Valuation Noncurrent	9,900	20,600
Long-Term Service Contracts Noncurrent	339	2,343
Other	3,846	4,518
Total other non-current obligations	60,131	74,892
Non-operating (income) expense, net:
Net foreign exchange (gains) losses	(3,758)	(3,036)	$ (4,249)
Insurance proceeds	(423)	0	0
Gain on early extinguishment of debt	0	0	(1,003)
Offering memorandum fees	0	0	1,142
Other	946	(688)	(28)
Nonoperating Income (Expense)	$ 5,127	$ 2,348	$ 4,082

Supplemental Balance Sheets 103

Supplemental Balance Sheets and Statements of Operations Detail Supplemental Balance Sheets and Statements of Operations - Property, Plant and Equipment Useful Life (Phantom)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years	20 years
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years	20 years
Buildings | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years	10 years
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	4 years	4 years
Furniture and fixtures | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years	10 years

Income_Loss Per Share - Common

Income/Loss Per Share - Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Numerator
Income (loss) from continuing operations									$ 47,989	$ (53,629)	$ (19,522)
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively									0	0	5,379
Net income (loss)	$ 52,914	$ 12,278	$ (4,998)	$ (12,205)	$ (15,173)	$ (8,600)	$ 7,194	$ (37,050)	$ 47,989	$ (53,629)	$ (14,143)
Weighted-average common shares outstanding:
Basic (in shares)									46,552	46,004	45,381
Assumed conversion of employee stock options (in shares)									2,235	0	0
Assumed conversion of Platinum Warrant (in shares)									6,602	0	0
Weighted-average shares outstanding (diluted)									55,389	46,004	45,381
Net income (loss) per basic share:
Loss from continuing operations (in dollars per share)									$ 1.03	$ (1.17)	$ (0.43)
Income (loss) from discontinued operations (in dollars per share)									0	0	0.12
Net income (loss) (in dollars per share)	$ 1.13	$ 0.26	$ (0.11)	$ (0.26)	$ (0.33)	$ (0.19)	$ 0.16	$ (0.81)	1.03	(1.17)	(0.31)
Net income (loss) per diluted share:
Loss from continuing operations (in dollars per share)									0.87	(1.17)	(0.43)
Income (loss) from discontinued operations (in dollars per share)									0	0	0.12
Net income (loss) (in dollars per share)	$ 0.93	$ 0.22	$ (0.11)	$ (0.26)	$ (0.32)	$ (0.19)	$ 0.14	$ (0.80)	$ 0.87	$ (1.17)	$ (0.31)

Income_Loss Per Share - Comm105

Income/Loss Per Share - Common Stock Conversion (Details) - shares shares in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Assumed conversion of employee stock grants
Common stock equivalents that could potentially dilute net income per basic share in the future, but were not included in the computation of diluted earnings per share because the impact would have been antidilutive
Common stock equivalents	771	3,329	1,783
Assumed conversion of Platinum Warrant
Common stock equivalents that could potentially dilute net income per basic share in the future, but were not included in the computation of diluted earnings per share because the impact would have been antidilutive
Common stock equivalents	0	4,951	6,287

Commitments and Contingencies -

Commitments and Contingencies - Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Annual rental expenses for operating leases	$ 6,700	$ 7,100	$ 7,600
Minimum lease payments
2,015	5,980
2,016	4,236
2,017	1,954
2,018	862
2,019	475
Thereafter	$ 585

Quarterly Results of Operati107

Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 197,519	$ 188,029	$ 187,308	$ 184,935	$ 183,926	$ 177,184	$ 186,123	$ 187,590	$ 757,791	$ 734,823	$ 823,192
Operating income (loss)	8,742	13,850	3,050	8,898	8,603	8,493	13,987	1,243	34,540	32,326	22,378
Income (loss) from continuing operations									47,989	(53,629)	(19,522)
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively									0	0	5,379
Net income (loss)	$ 52,914	$ 12,278	$ (4,998)	$ (12,205)	$ (15,173)	$ (8,600)	$ 7,194	$ (37,050)	$ 47,989	$ (53,629)	$ (14,143)
Net income (loss) per basic share:
Loss from continuing operations (in dollars per share)									$ 1.03	$ (1.17)	$ (0.43)
Loss from discontinued operations (in dollars per share)									0	0	0.12
Net income (loss) (in dollars per share)	$ 1.13	$ 0.26	$ (0.11)	$ (0.26)	$ (0.33)	$ (0.19)	$ 0.16	$ (0.81)	1.03	(1.17)	(0.31)
Net income (loss) per diluted share:
Loss from continuing operations (in dollars per share)									0.87	(1.17)	(0.43)
Loss from discontinued operations (in dollars per share)									0	0	0.12
Net income (loss) (in dollars per share)	$ 0.93	$ 0.22	$ (0.11)	$ (0.26)	$ (0.32)	$ (0.19)	$ 0.14	$ (0.80)	$ 0.87	$ (1.17)	$ (0.31)

Condensed Consolidating Fina108

Condensed Consolidating Financial Statements - Balance Sheet (Details) - USD ($)	May 05, 2010	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Current assets:
Cash and cash equivalents		$ 109,774,000		$ 65,004,000	$ 56,362,000	$ 57,929,000
Accounts receivable, net		92,526,000		93,168,000
Intercompany receivable		0		0
Inventories, net		147,955,000		168,879,000
Prepaid expenses and other		28,759,000		25,496,000
Total current assets		379,014,000		352,547,000
Property and equipment, net		209,311,000		241,839,000
Investment in NEC TOKIN		63,416,000		20,334,000
Investments in subsidiaries		0		0
Goodwill		40,294,000		40,294,000
Intangible assets, net		29,781,000		33,301,000
Deferred income taxes		8,593,000		8,397,000
Other assets		4,119,000		3,068,000
Long-term intercompany receivable		0		0
Total assets		734,528,000		699,780,000
Current liabilities:
Current portion of long-term debt		2,000,000		2,000,000
Accounts payable, trade		69,674,000		70,981,000
Intercompany payable		0		0
Accrued expenses		57,752,000		50,320,000
Income taxes payable		715,000		453,000
Total current liabilities		130,141,000		123,754,000
Long-term debt, less current portion		386,211,000		385,833,000
Other non-current obligations		60,131,000		74,892,000
Deferred income taxes		3,370,000		2,820,000
Long-term intercompany payable		0		0
Stockholders’ equity		154,675,000		112,481,000	164,682,000	221,884,000
Total liabilities and stockholders’ equity		734,528,000		699,780,000
Reclassifications and Eliminations
Current assets:
Cash and cash equivalents		0		0	0	0
Accounts receivable, net		0		0
Intercompany receivable		(419,633,000)		(332,957,000)
Inventories, net		0		0
Prepaid expenses and other		(2,964,000)		(2,964,000)
Total current assets		(422,597,000)		(335,921,000)
Property and equipment, net		0		0
Investment in NEC TOKIN		0		0
Investments in subsidiaries		(988,083,000)		(905,190,000)
Goodwill		0		0
Intangible assets, net		0		0
Deferred income taxes		0		0
Other assets		0		0
Long-term intercompany receivable		(103,376,000)		(110,016,000)
Total assets		(1,514,056,000)		(1,351,127,000)
Current liabilities:
Current portion of long-term debt		0		0
Accounts payable, trade		0		0
Intercompany payable		(419,633,000)		(332,957,000)
Accrued expenses		0		0
Income taxes payable		(2,964,000)		(2,964,000)
Total current liabilities		(422,597,000)		(335,921,000)
Long-term debt, less current portion		0		0
Other non-current obligations		0		0
Deferred income taxes		0		0
Long-term intercompany payable		(103,376,000)		(110,016,000)
Stockholders’ equity		(988,083,000)		(905,190,000)
Total liabilities and stockholders’ equity		(1,514,056,000)		(1,351,127,000)
Parent
Current assets:
Cash and cash equivalents		2,072,000		640,000	640,000	616,000
Accounts receivable, net		0		0
Intercompany receivable		33,613,000		30,210,000
Inventories, net		0		0
Prepaid expenses and other		3,325,000		3,325,000
Total current assets		39,010,000		34,175,000
Property and equipment, net		481,000		255,000
Investment in NEC TOKIN		0		0
Investments in subsidiaries		473,147,000		382,108,000
Goodwill		0		0
Intangible assets, net		0		0
Deferred income taxes		0		0
Other assets		0		0
Long-term intercompany receivable		63,385,000		67,500,000
Total assets		576,023,000		484,038,000
Current liabilities:
Current portion of long-term debt		0		2,000,000
Accounts payable, trade		3,000		20,000
Intercompany payable		50,051,000		280,000
Accrued expenses		18,822,000		17,305,000
Income taxes payable		0		0
Total current liabilities		68,876,000		19,605,000
Long-term debt, less current portion		352,472,000		351,952,000
Other non-current obligations		0		0
Deferred income taxes		0		0
Long-term intercompany payable		0		0
Stockholders’ equity		154,675,000		112,481,000
Total liabilities and stockholders’ equity		$ 576,023,000		484,038,000
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Percentage of ownership interest		100.00%
Current assets:
Cash and cash equivalents		$ 72,705,000		36,209,000	33,094,000	22,200,000
Accounts receivable, net		30,265,000		41,025,000
Intercompany receivable		215,183,000		132,523,000
Inventories, net		97,761,000		113,289,000
Prepaid expenses and other		14,460,000		12,161,000
Total current assets		430,374,000		335,207,000
Property and equipment, net		81,818,000		93,936,000
Investment in NEC TOKIN		63,416,000		20,334,000
Investments in subsidiaries		421,577,000		429,723,000
Goodwill		40,294,000		40,294,000
Intangible assets, net		24,665,000		27,252,000
Deferred income taxes		896,000		800,000
Other assets		3,543,000		2,452,000
Long-term intercompany receivable		38,902,000		41,428,000
Total assets		1,105,485,000		991,426,000
Current liabilities:
Current portion of long-term debt		0		0
Accounts payable, trade		34,790,000		34,618,000
Intercompany payable		294,940,000		275,498,000
Accrued expenses		19,552,000		11,807,000
Income taxes payable		2,997,000		2,983,000
Total current liabilities		352,279,000		324,906,000
Long-term debt, less current portion		31,881,000		19,881,000
Other non-current obligations		13,151,000		25,797,000
Deferred income taxes		2,236,000		2,242,000
Long-term intercompany payable		63,385,000		67,500,000
Stockholders’ equity		642,553,000		551,100,000
Total liabilities and stockholders’ equity		1,105,485,000		991,426,000
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents		34,997,000		28,155,000	$ 22,628,000	$ 35,113,000
Accounts receivable, net		62,261,000		52,143,000
Intercompany receivable		170,837,000		170,224,000
Inventories, net		50,194,000		55,590,000
Prepaid expenses and other		13,938,000		12,974,000
Total current assets		332,227,000		319,086,000
Property and equipment, net		127,012,000		147,648,000
Investment in NEC TOKIN		0		0
Investments in subsidiaries		93,359,000		93,359,000
Goodwill		0		0
Intangible assets, net		5,116,000		6,049,000
Deferred income taxes		7,697,000		7,597,000
Other assets		576,000		616,000
Long-term intercompany receivable		1,089,000		1,088,000
Total assets		567,076,000		575,443,000
Current liabilities:
Current portion of long-term debt		2,000,000		0
Accounts payable, trade		34,881,000		36,343,000
Intercompany payable		74,642,000		57,179,000
Accrued expenses		19,378,000		21,208,000
Income taxes payable		682,000		434,000
Total current liabilities		131,583,000		115,164,000
Long-term debt, less current portion		1,858,000		14,000,000
Other non-current obligations		46,980,000		49,095,000
Deferred income taxes		1,134,000		578,000
Long-term intercompany payable		39,991,000		42,516,000
Stockholders’ equity		345,530,000		354,090,000
Total liabilities and stockholders’ equity		$ 567,076,000		$ 575,443,000
10.5% Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate (as a percent)	10.50%	10.50%	10.50%
Percentage of capital stock	51.00%
10.5% Senior Notes | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Percentage of capital stock	51.00%

Condensed Consolidating Fina109

Condensed Consolidating Financial Statements - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 197,519	$ 188,029	$ 187,308	$ 184,935	$ 183,926	$ 177,184	$ 186,123	$ 187,590	$ 757,791	$ 734,823	$ 823,192
Operating costs and expenses:
Cost of sales									571,679	571,543	663,683
Selling, general and administrative expenses									107,868	101,446	98,533
Research and development									27,629	24,955	25,802
Restructuring charges									5,404	4,178	13,017
Asset Impairment Charges									10,279	0	0
Write down of long-lived assets									10,279	0	0
Net (gain) loss on sales and disposals of assets									392	375	(221)
Total operating costs and expenses									723,251	702,497	800,814
Operating income (loss)	8,742	13,850	3,050	8,898	8,603	8,493	13,987	1,243	34,540	32,326	22,378
Interest income									(24)	(14)	(15)
Interest expense									39,755	39,605	40,701
Change in value of TOKIN options									(10,700)	26,300	(2,100)
Non-operating (income) expense, net									(5,127)	(2,348)	(4,082)
Equity in earnings of subsidiaries									0	0	0
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN									10,636	(31,217)	(12,126)
Income tax expense (benefit)									4,290	6,006	5,227
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN									6,346	(37,223)	(17,353)
Equity income (loss) from TOKIN									41,643	(16,406)	(2,169)
Income (loss) from continuing operations									47,989	(53,629)	(19,522)
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively									0	0	5,379
Net income (loss)	$ 52,914	$ 12,278	$ (4,998)	$ (12,205)	$ (15,173)	$ (8,600)	$ 7,194	$ (37,050)	47,989	(53,629)	(14,143)
Reclassifications and Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales									(813,899)	(835,030)	(929,212)
Operating costs and expenses:
Cost of sales									(759,432)	(780,156)	(869,707)
Selling, general and administrative expenses									(54,467)	(54,874)	(59,505)
Research and development									0	0	0
Restructuring charges									0	0	0
Asset Impairment Charges									0
Net (gain) loss on sales and disposals of assets									0	0	0
Total operating costs and expenses									(813,899)	(835,030)	(929,212)
Operating income (loss)									0	0	0
Interest income									0	0	0
Interest expense									0	0	0
Change in value of TOKIN options									0	0	0
Non-operating (income) expense, net									0	0	0
Equity in earnings of subsidiaries									91,186	(12,619)	27,998
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN									(91,186)	12,619	(27,998)
Income tax expense (benefit)									0	0	0
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN									(91,186)	12,619	(27,998)
Equity income (loss) from TOKIN									0	0	0
Income (loss) from continuing operations											(27,998)
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively											0
Net income (loss)									(91,186)	12,619	(27,998)
Parent
Condensed Financial Statements, Captions [Line Items]
Net sales									0	0	195
Operating costs and expenses:
Cost of sales									1,607	1,194	2,468
Selling, general and administrative expenses									44,447	38,071	41,783
Research and development									323	79	436
Restructuring charges									0	0	0
Asset Impairment Charges									0
Net (gain) loss on sales and disposals of assets									(299)	(7)	(10)
Total operating costs and expenses									46,078	39,337	44,677
Operating income (loss)									(46,078)	(39,337)	(44,482)
Interest income									0	0	0
Interest expense									37,606	37,856	38,632
Change in value of TOKIN options									0	0	0
Non-operating (income) expense, net									(40,487)	(36,183)	(40,903)
Equity in earnings of subsidiaries									(91,186)	12,619	(27,998)
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN									47,989	(53,629)	(14,213)
Income tax expense (benefit)									0	0	(70)
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN									47,989	(53,629)	(14,143)
Equity income (loss) from TOKIN									0	0	0
Income (loss) from continuing operations											(14,143)
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively											0
Net income (loss)									47,989	(53,629)	(14,143)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales									860,428	866,163	978,705
Operating costs and expenses:
Cost of sales									683,103	708,143	823,429
Selling, general and administrative expenses									74,093	74,521	70,074
Research and development									18,073	17,313	17,588
Restructuring charges									3,901	2,564	3,310
Asset Impairment Charges									4,586
Net (gain) loss on sales and disposals of assets									1,405	(484)	181
Total operating costs and expenses									785,161	802,057	914,582
Operating income (loss)									75,267	64,106	64,123
Interest income									3	0	0
Interest expense									1,587	1,189	998
Change in value of TOKIN options									(10,700)	26,300	(2,100)
Non-operating (income) expense, net									40,527	34,188	49,069
Equity in earnings of subsidiaries									0	0	0
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN									43,850	2,429	16,156
Income tax expense (benefit)									(65)	(269)	576
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN									43,915	2,698	15,580
Equity income (loss) from TOKIN									41,643	(16,406)	(2,169)
Income (loss) from continuing operations											13,411
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively											102
Net income (loss)									85,558	(13,708)	13,513
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales									711,262	703,690	773,504
Operating costs and expenses:
Cost of sales									646,401	642,362	707,493
Selling, general and administrative expenses									43,795	43,728	46,181
Research and development									9,233	7,563	7,778
Restructuring charges									1,503	1,614	9,707
Asset Impairment Charges									5,693
Net (gain) loss on sales and disposals of assets									(714)	866	(392)
Total operating costs and expenses									705,911	696,133	770,767
Operating income (loss)									5,351	7,557	2,737
Interest income									(27)	(14)	(15)
Interest expense									562	560	1,071
Change in value of TOKIN options									0	0	0
Non-operating (income) expense, net									(5,167)	(353)	(12,248)
Equity in earnings of subsidiaries									0	0	0
Income (loss) from continuing operations before income taxes and equity income (loss) from TOKIN									9,983	7,364	13,929
Income tax expense (benefit)									4,355	6,275	4,721
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN									5,628	1,089	9,208
Equity income (loss) from TOKIN									0	0	0
Income (loss) from continuing operations											9,208
Income (loss) from discontinued operations, net of income tax expense (benefit) of $0, $0, and $1,976, respectively											5,277
Net income (loss)									$ 5,628	$ 1,089	$ 14,485

Condensed Consolidating Fina110

Condensed Consolidating Financial Statements - Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	$ 37,602	$ (56,258)	$ (61,123)
Reclassifications and Eliminations
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	(91,186)	12,619	(27,998)
Parent
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	43,875	(49,918)	(32,103)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	91,453	(24,832)	19,650
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	$ (6,540)	$ 5,873	$ (20,672)

Condensed Consolidating Fina111

Condensed Consolidating Financial Statements - Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	$ 71,667	$ 32,365	$ 24,402
Investing activities:
Capital expenditures	(25,617)	(20,469)	(22,232)
Change in restricted cash	0	1,802	11,509
Proceeds from sale of assets	(19)	(971)	(4,788)
Proceeds from sale of discontinued operations	0	0	9,564
Acquisitions, net of cash received	0	(2,892)	0
Net cash provided by (used in) investing activities	(25,598)	(20,588)	3,629
Financing activities:
Proceeds from revolving line of credit	12,000	10,000	42,340
Payments of revolving line of credit	(12,000)	(9,600)	(27,342)
Deferred acquisition payments	0	(3,000)	(19,527)
Proceeds from issuance of debt	2,314	0	0
Payment of long-term debt	(2,428)	(481)	(21,733)
Proceeds from exercise of stock options	1,133	0	24
Purchase of treasury stock	(1,144)	(722)	(630)
Net cash provided by (used in) financing activities	(125)	(3,803)	(26,868)
Net increase (decrease) in cash and cash equivalents	45,944	7,974	1,163
Effect of foreign currency fluctuations on cash	(1,174)	668	(2,730)
Cash and cash equivalents at beginning of fiscal year	65,004	56,362	57,929
Cash and cash equivalents at end of fiscal year	109,774	65,004	56,362
Reclassifications and Eliminations
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	0	0	0
Investing activities:
Capital expenditures	0	0	0
Change in restricted cash	0	0	0
Proceeds from sale of assets	0	0	0
Proceeds from sale of discontinued operations			0
Acquisitions, net of cash received	0	0
Net cash provided by (used in) investing activities	0	0	0
Financing activities:
Proceeds from revolving line of credit	0	0	0
Payments of revolving line of credit	0	0	0
Deferred acquisition payments	0	0	0
Payment of long-term debt	0	0	0
Proceeds from exercise of stock options	0		0
Purchase of treasury stock	0	0
Net cash provided by (used in) financing activities	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Effect of foreign currency fluctuations on cash	0	0	0
Cash and cash equivalents at beginning of fiscal year	0	0	0
Cash and cash equivalents at end of fiscal year	0	0	0
Parent
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	3,313	3,722	39,575
Investing activities:
Capital expenditures	0	0	0
Change in restricted cash	0	0	0
Proceeds from sale of assets	0	0	0
Proceeds from sale of discontinued operations			0
Acquisitions, net of cash received	0	0
Net cash provided by (used in) investing activities	0	0	0
Financing activities:
Proceeds from revolving line of credit	0	0	0
Payments of revolving line of credit	0	0	0
Deferred acquisition payments	0	(3,000)	(18,527)
Payment of long-term debt	(1,870)	0	(20,417)
Proceeds from exercise of stock options	1,133		24
Purchase of treasury stock	(1,144)	(722)	(630)
Net cash provided by (used in) financing activities	(1,881)	(3,722)	(39,550)
Net increase (decrease) in cash and cash equivalents	1,432	0	25
Effect of foreign currency fluctuations on cash	0	0	(1)
Cash and cash equivalents at beginning of fiscal year	640	640	616
Cash and cash equivalents at end of fiscal year	2,072	640	640
Guarantor Subsidiaries
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	34,778	15,107	(4,085)
Investing activities:
Capital expenditures	(10,295)	(9,550)	(12,930)
Change in restricted cash	0	1,802	11,509
Proceeds from sale of assets	(13)	(248)	(2,403)
Proceeds from sale of discontinued operations			0
Acquisitions, net of cash received	0	(2,892)
Net cash provided by (used in) investing activities	(10,282)	(10,392)	982
Financing activities:
Proceeds from revolving line of credit	12,000	8,000	37,340
Payments of revolving line of credit	0	(9,600)	(22,342)
Deferred acquisition payments	0	0	(1,000)
Payment of long-term debt	0	0	0
Proceeds from exercise of stock options	0		0
Purchase of treasury stock	0	0	0
Net cash provided by (used in) financing activities	12,000	(1,600)	13,998
Net increase (decrease) in cash and cash equivalents	36,496	3,115	10,895
Effect of foreign currency fluctuations on cash	0	0	(1)
Cash and cash equivalents at beginning of fiscal year	36,209	33,094	22,200
Cash and cash equivalents at end of fiscal year	72,705	36,209	33,094
Non-Guarantor Subsidiaries
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	33,576	13,536	(11,088)
Investing activities:
Capital expenditures	(15,322)	(10,919)	(9,302)
Change in restricted cash	0	0	0
Proceeds from sale of assets	(6)	(723)	(2,385)
Proceeds from sale of discontinued operations			9,564
Acquisitions, net of cash received	0	0
Net cash provided by (used in) investing activities	(15,316)	(10,196)	2,647
Financing activities:
Proceeds from revolving line of credit	0	2,000	5,000
Payments of revolving line of credit	(12,000)	0	(5,000)
Deferred acquisition payments	0	0	0
Proceeds from issuance of debt	2,314
Payment of long-term debt	(558)	(481)	(1,316)
Proceeds from exercise of stock options	0		0
Purchase of treasury stock	0	0	0
Net cash provided by (used in) financing activities	(10,244)	1,519	(1,316)
Net increase (decrease) in cash and cash equivalents	8,016	4,859	(9,757)
Effect of foreign currency fluctuations on cash	(1,174)	668	(2,728)
Cash and cash equivalents at beginning of fiscal year	28,155	22,628	35,113
Cash and cash equivalents at end of fiscal year	$ 34,997	$ 28,155	$ 22,628

Subsequent Events - Tokin (Deta

Subsequent Events - Tokin (Details) ¥ in Millions, $ in Millions	Apr. 14, 2017JPY (¥)	Feb. 23, 2017USD ($)	Feb. 23, 2017JPY (¥)	Apr. 19, 2017	Apr. 14, 2017USD ($)Rate	Apr. 14, 2017JPY (¥)Rate	Apr. 09, 2017Rate	Mar. 31, 2017Rate
Subsequent Event [Line Items]
Exchange rate								11182.00%
Subsequent Event
Subsequent Event [Line Items]
Exchange rate					10887.40%	10887.40%	10875.10%
NEC TOKIN | Subsequent Event
Subsequent Event [Line Items]
Purchase price					$ 442.7	¥ 49,600
Proceeds | ¥	¥ 99
NEC TOKIN | KEC
Subsequent Event [Line Items]
Consideration transferred		$ 148.8	¥ 16,200
Purchase price paid		$ 55.2	¥ 6,000
NEC TOKIN | KEC | Subsequent Event
Subsequent Event [Line Items]
Interest acquired				66.00%

Subsequent Events - Schedule of

Subsequent Events - Schedule of gain on sale of business (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017JPY (¥)	Mar. 31, 2017USD ($)Rate	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Jun. 30, 2017JPY (¥)
Subsequent Event [Line Items]
Gain on sale | $			$ 0	$ 0	$ 5,644
Exchange rate | Rate			11182.00%
Scenario, Forecast
Subsequent Event [Line Items]
Gain on sale	$ 81,804	¥ 133.6
KEMET’s equity ownership %	34.00%					34.00%
Scenario, Forecast | NEC TOKIN
Subsequent Event [Line Items]
Sales price	$ 443,355					¥ 495.8
Carrying amount of EMD net assets	68,971					77.1
Remove AOCI	4,619					5.2
Transaction related fees and taxes	6,099					6.8
Deferred tax asset	123,144					¥ 13.8
Gain on sale	$ 240,600	¥ 392.9

Subsequent Events - Long-term d

Subsequent Events - Long-term debt (Details) - USD ($)	Apr. 28, 2017	Mar. 31, 2017	Dec. 31, 2016	May 05, 2010
Term Loan Credit Agreement | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 345,000,000
Incremental commitments	$ 50,000,000
Stated interest rate (as a percent)	0.97%
Discount bps	3.00%
Percent of outstanding voting stock	65.00%
Percent of aggregate principal	1.25%
Payment amount	$ 4,300,000
Loan Amendment | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 75,000,000
10.5% Senior Notes
Subsequent Event [Line Items]
Stated interest rate (as a percent)		10.50%	10.50%	10.50%
Base Rate | Term Loan Credit Agreement | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Spread on variable rate basis (as a percent)	5.00%
LIBOR | Term Loan Credit Agreement | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Spread on variable rate basis (as a percent)	6.00%
Minimum | LIBOR | Term Loan Credit Agreement | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Spread on variable rate basis (as a percent)	1.00%