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Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Changes to the Company's accrual for product warranties
Warranty Accrual, Balance at beginning of period	$ 16,295	$ 16,748
Accruals for warranties	14,246	12,918
Foreign currency translation	20	48
Payments / utilizations	(14,354)	(13,585)
Warranty Accrual, Balance at end of period	$ 16,207	$ 16,129

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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

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Increase or Decrease in standard product warranty liability due to currency translation. Does not include any Increase or Decrease in an extended product warranty liability due to currency translation.

+ References

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-Publisher FASB

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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.

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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

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