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Guarantees, Other Contingent Liabilities, And Other Matters (Narrative) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Mar. 31, 2016
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Face amount of guarantee including unpaid accrued interest | $ 33,000 | $ 26,000 | $ 13,000
Fair value of the guarantees | 1,722 | 1,356 | 1,628
Other contingent liabilities | 2,000 |  |
Advances to suppliers current and non-current | 78,000 | 71,000 | 134,000
Valuation allowance amount related to advances to suppliers | 28,000 | 27,000 | 29,000
Net provision for losses (recoveries) on advances and guaranteed loans to suppliers | (2,038) | (4,354) |
Aggregate balance of recoverable value added tax credits | 35,000 | 52,000 | 52,000
Valuation allowance on recoverable value added tax credits | 10,000 | $ 21,000 | $ 19,000
Santa Catarina [Member] |  |  |
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits | 15,000 |  |
Reduced Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits | 14,000 |  |
Santa Catarina [Member] | Minimum [Member] |  |  |
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Estimate of possible loss on remaining VAT audit assessment | 0 |  |
Santa Catarina [Member] | Maximum [Member] |  |  |
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Estimate of possible loss on remaining VAT audit assessment | 14,000 |  |
Parana [Member] |  |  |
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits | 17,000 |  |
Reduced Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits | 5,000 |  |
Parana [Member] | Minimum [Member] |  |  |
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Estimate of possible loss on remaining VAT audit assessment | 0 |  |
Parana [Member] | Maximum [Member] |  |  |
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items] |  |  |
Estimate of possible loss on remaining VAT audit assessment | $ 5,000 |  |

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- Definition Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248 + Details
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Advances to Suppliers Current and Noncurrent + References No definition available. + Details
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- Definition Aggregate balance of recoverable value added tax credits + References No definition available. + Details
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- Definition Guarantee Face Amount Including Unpaid Accrued interest + References No definition available. + Details
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- Definition [Line Items] for Guarantees, Other Contingent Liabilities, and Other Matters [Table] + References No definition available. + Details
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- Definition Reduction of Brazil Audit Assessment For Tax, Penalties, And Interest On Recoverable Value Added Tax Credits + References No definition available. + Details
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- Definition Valuation Allowance Amount Related to Advances To Suppliers + References No definition available. + Details
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- Definition Valuation allowance on recoverable value added tax credits + References No definition available. + Details
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