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Acquisitions (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended |  | 3 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2012 Geofinity Manufacturing of Surrey, British Columbia [Member] | Dec. 31, 2012 Radiadores Visconde Ltda [Member] | Sep. 30, 2012 Radiadores Visconde Ltda [Member] South America [Member]
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration, net of cash acquired | $ 0 | $ 4.9 | $ 4.9 |  |
Purchase price allocation resulted in acquired technology |  |  | 3.5 |  |
Purchase price allocation, working capital net assets |  |  | 0.6 |  |
Purchase price allocation, goodwill |  |  | 0.8 |  |
Acquired technology, amortization period |  |  | 10 years |  |
Percentage of interests acquired (in hundredths) |  |  |  | 50.00% |
Notes payable |  |  |  | 2.0 |
Selling, General and Administrative Expense Increase Decrease |  |  |  |  | $ 2.0

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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