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Accounts Receivable - Net (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Mar. 31, 2013 | May 31, 2013 Fenco [Member]
Accounts Receivable - Net [Abstract] |  |  |  |  |  |
Accounts receivable - trade | $ 45,454,000 |  | $ 45,454,000 |  | $ 40,686,000 |
Allowance for bad debts | (993,000) |  | (993,000) |  | (1,019,000) |
Customer allowances earned | (10,876,000) |  | (10,876,000) |  | (11,160,000) |
Customer payment discrepancies | (471,000) |  | (471,000) |  | (514,000) |
Customer returns RGA issued | (8,589,000) |  | (8,589,000) |  | (4,966,000) |
Customer core returns accruals | (23,246,000) |  | (23,246,000) |  | (19,338,000) |
Less: total accounts receivable offset accounts | (44,175,000) |  | (44,175,000) |  | (36,997,000) |
Total accounts receivable - net | 1,279,000 |  | 1,279,000 |  | 3,689,000 |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Accounts receivable - net, deconsolidated |  |  |  |  |  | 4,377,000
Warranty Returns [Abstract] |  |  |  |  |  |
Warranty accrual included in customer returns RGA issued | 4,091,000 |  | 4,091,000 |  |  |
Warranty accrual included in customer finished goods returns accrual | 3,113,000 |  | 3,113,000 |  |  |
Warranty return accrual, deconsolidated |  |  |  |  |  | 5,642,000
Change in warranty return accrual [Roll Forward] |  |  |  |  |  |
Balance at beginning of period | 5,302,000 | 4,687,000 | 6,205,000 | 4,426,000 |  |
Charged to expense | 17,357,000 | 13,868,000 | 28,725,000 | 25,615,000 |  |
Amounts processed | (15,455,000) | (13,070,000) | (27,726,000) | (24,556,000) |  |
Balance at end of period | $ 7,204,000 | $ 5,485,000 | $ 7,204,000 | $ 5,485,000 |  |

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- Definition Represents the estimated future credits to be provided for Used Cores returned by the customers. + References No definition available. + Details
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- Definition A reduction to trade accounts receivable for customer payment discrepancies. + References No definition available. + Details
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- Definition A reduction from trade accounts receivable for returned goods authorization issued for in-transit unit returns. + References No definition available. + Details
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- Definition For the disposal group, including a component of the entity (discontinued operation), amount of the warranty accrual as of the balance sheet date. + References No definition available. + Details
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- Definition The sum of the total accounts receivable offset accounts. + References No definition available. + Details
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- Definition Amount as of the balance sheet date of the warranty estimate for which an RGA has not been issued and is included in the customer finished goods returns accrual liability. + References No definition available. + Details
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- Definition Amount as of the balance sheet date of the warranty accrual for which an RGA has been issued and is included as an offset account to total net accounts receivable. + References No definition available. + Details
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- Definition Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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