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Extended Product Warranty Included in Short and Long-Term Deferred Revenue and Customer Advances (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Product Warranty Liability [Line Items]      
Balance at beginning of period $ 43,300 $ 34,909 $ 28,044
Acquisition 870    
Deferral of new extended warranty revenue 28,549 29,519 20,630
Recognition of extended warranty deferred revenue (26,220) (21,128) (13,765)
Balance at end of period $ 46,499 $ 43,300 $ 34,909