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Intangible Assets (Tables) | 9 Months Ended
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Dec. 31, 2012
Intangible Assets [Abstract] |
Intangible assets subject to amortization | The following is a summary of the intangible assets attributable to the Company's rotating electrical product line segment subject to amortization at December 31, 2012 and March 31, 2012.
|  |  | December 31, 2012 |  |  | March 31, 2012 |
| Weighted Average Amortization Period |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Gross Carrying Value |  |  | Accumulated Amortization |
Intangible assets subject to amortization |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks | 9 years |  | $ | 553,000 |  |  | $ | 318,000 |  |  | $ | 553,000 |  |  | $ | 262,000 |
Customer relationships | 12 years |  |  | 6,464,000 |  |  |  | 2,582,000 |  |  |  | 6,464,000 |  |  |  | 2,096,000 |
Non-compete agreements | 4 years |  |  | 257,000 |  |  |  | 198,000 |  |  |  | 257,000 |  |  |  | 160,000 |
Total | 11 years |  | $ | 7,274,000 |  |  | $ | 3,098,000 |  |  | $ | 7,274,000 |  |  | $ | 2,518,000 |
Undercar Product Line The following is a summary of the undercar product line segment's intangible assets subject to amortization at December 31, 2012 and March 31, 2012.
|  |  | December 31, 2012 |  |  | March 31, 2012 |
| Weighted Average Amortization Period |  | Gross Carrying Value |  |  | Accumulated A mortization |  |  | Gross Carrying Value |  |  | Accumulated Amortization |
Intangible assets subject to amortization |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks | 20 years |  | $ | 11,159,000 |  |  | $ | 918,000 |  |  | $ | 11,159,000 |  |  | $ | 500,000 |
Customer relationships | 10 years |  |  | 7,680,000 |  |  |  | 1,267,000 |  |  |  | 7,680,000 |  |  |  | 691,000 |
Non-compete agreements | 2 years |  |  | 144,000 |  |  |  | 118,000 |  |  |  | 144,000 |  |  |  | 64,000 |
Total | 16 years |  | $ | 18,983,000 |  |  | $ | 2,303,000 |  |  | $ | 18,983,000 |  |  | $ | 1,255,000 |
Amortization expense for acquired intangible assets | Consolidated amortization expense for acquired intangible assets for the three and nine months ended December 31, 2012 and 2011 is as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | December 31, |  |  | December 31, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Amortization expense |  | $ | 543,000 |  |  | $ | 495,000 |  |  | $ | 1,628,000 |  |  | $ | 1,464,000 |
Estimated future amortization expense for intangible assets | The consolidated aggregate estimated future amortization expense for intangible assets subject to amortization is as follows:
Year Ending March 31, |  |  |
2013 - remaining 3 months |  | $ | 544,000 |
2014 |  |  | 2,070,000 |
2015 |  |  | 1,996,000 |
2016 |  |  | 1,675,000 |
2017 |  |  | 1,592,000 |
Thereafter |  |  | 12,979,000 |
Total |  | $ | 20,856,000 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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