Summary of Significant Accounting Policies (Changes in the Carrying Amount of Warranty Obligations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Product Warranties Disclosures [Abstract]
Balance at December 31	$ 3,440	$ 3,468
Provision charged to income	4,376	3,678
Usage	(3,649)	(3,258)
Adjustments to previously provided warranties, net	(198)	(477)
Currency translation	(59)	29
Balance at December 31	$ 3,910	$ 3,440

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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Total Increase or Decrease in the standard and extended product warranty liability due to currency translation.

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Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates).

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The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

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-Publisher FASB

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