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Accrued Liabilities - Other - Summary of Activity in Accrued Warranty and Service Liabilities (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2015
USD ($)
Payables and Accruals [Abstract]  
Liability, beginning of year $ 1,176
Expense for new warranties issued 226
Accruals assumed in acquisition 165
Accruals related to preexisting warranties (216)
Warranty claims paid (275)
Liability, end of period $ 1,076