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Product Warranty Accrual Included in Other Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Other Accrued Liabilities [Line Items]    
Balance as of January 1 $ 14,719 $ 14,886
Provision for warranties issued in current year 2,991 2,766
Provision for (Recovery of) pre-existing warranties, net (121) 650
Payments (2,599) (2,879)
Balance as of June 30 $ 14,990 $ 15,423