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Cincinnati Sub-Zero Acquisition - Summary of Amortization Expense (Detail) - Cincinnati Sub-Zero Products, LLC - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2016
Business Acquisition [Line Items]    
Amortization of intangibles $ 325 $ 975
Product revenues    
Business Acquisition [Line Items]    
Amortization of intangibles 195 585
Research and development expenses    
Business Acquisition [Line Items]    
Amortization of intangibles $ 130 $ 390