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Summary of Significant Accounting Policies and Basis of Presentation (Tables) | 12 Months Ended
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Dec. 31, 2012
Reconciliation of Changes in Accrued Warranty Costs | The following is a reconciliation of the changes in accrued warranty costs for the reporting period:
|  | December 31, |
|  | 2012 |  |  | 2011 |
Balance at beginning of year |  | $ | 8,487 |  |  | $ | 1,261 |
Assumed warranty from W.E.T. at acquisition |  |  | — |  |  |  | 6,979 |
Warranty claims paid |  |  | (347 | ) |  |  | (81 | )
Expense |  |  | 215 |  |  |  | 551 |
Adjustment due to currency translation |  |  | 233 |  |  |  | (223 | )
Balance at end of year |  | $ | 8,588 |  |  | $ | 8,487 |
Reconciliation of Changes in Inventory Reserve | The following is a reconciliation of the changes in the inventory reserve (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Balance at beginning of year |  | $ | 1,127 |  |  | $ | 572 |
Expense |  |  | 1,307 |  |  |  | 532 |
Inventory write off |  |  | (215 | ) |  |  | (10 | )
Adjustment due to currency translation |  |  | (34 | ) |  |  | 33 |
Balance at end of year |  | $ | 2,185 |  |  | $ | 1,127 |
Estimated Useful Lives of Property and Equipment | The estimated useful lives of the Company’s property and equipment are as follows:
Asset Category |  | Useful Life
Plant and Equipment |  | 2 to 20 years
Computer equipment and software |  | 1 to 10 years
Leasehold improvements |  | Shorter of estimated life or term of lease
Production tooling |  | Estimated life of tool (2 to 5 years)
Buildings |  | 5 to 50 years
Capital Leases |  | Shorter of useful life or term of lease
Furniture, fixtures and fittings |  | 1 to 15 years
Fair Value and Corresponding Useful Lives for Acquired Intangible Assets | The fair value and corresponding useful lives for acquired intangible assets were determined with the assistance of an independent third-party valuation firm and are listed below as follows:
Asset Category |  | Useful Life
Customer relationships |  | 10-15 years
Order Backlog |  | 0.5 years
Technology |  | 8-9 years
Production Development Costs |  | 4 years
Estimate of Total Intangible Asset Amortization | An estimate of total intangible asset amortization by year, including the aforementioned Johnson Control patents and those obtained through the acquisition of W.E.T., is as follows:
2013 |  |  | 15,917 |
2014 |  |  | 15,066 |
2015 |  |  | 13,618 |
2016 |  |  | 12,444 |
2017 |  |  | 11,296 |
Thereafter |  |  | 27,363 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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