Summary of Warranty Liability and Activity (Detail) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Schedule of Accrued Liabilities [Line Items]
Accrued product warranties, beginning of period	$ 19,214	$ 17,299	$ 18,686	$ 9,438
Amounts paid for warranty services	(948)	(1,022)	(6,128)	(5,783)
Warranty provisions for products sold	(388)	1,367	4,639	5,754
Accrued product warranties acquired				8,247
Currency translation adjustments and other	(448)	503	233	491
Accrued product warranties, end of period	17,430	18,147	17,430	18,147
Current accrued product warranties, end of period	14,090	15,330	14,090	15,330	15,711
Long-term accrued product warranties, end of period	$ 3,340	$ 2,817	$ 3,340	$ 2,817

Product Warranty Accrual, Warranties Issued, Increase (Decrease)

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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 liability for standard and extended product warranties acquired in a business acquisition.

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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. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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