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Product Warranty Accrual Included in Other Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Other Accrued Liabilities [Line Items]    
Balance as of January 1 $ 14,719 $ 14,886
Provision for warranties issued in current year 4,975 4,462
Provision for (Recovery of) pre-existing warranties, net (112) 508
Payments (4,097) (4,256)
Balance as of September 30 $ 15,485 $ 15,600