Legal Proceedings and Other Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 Installment Agreement
Loss Contingencies [Line Items]
Workmen's compensation insurance policy per claim deductible	$ 250
Remaining obligation to pay product liability settlement to plaintiffs	1,615
Number of installments for the payment of product liability settlement	17
Annual installment amount	95
Settlement agreements date	May 5, 2011
Number of settlement agreements	2
Estimated Reserve for Product Liability Claims, change in period	12 months
Fiscal Year 2012 [Member]
Loss Contingencies [Line Items]
Maximum workmen's compensation insurance policy aggregate	1,000
Fiscal Year 2013 [Member]
Loss Contingencies [Line Items]
Maximum workmen's compensation insurance policy aggregate	1,150
Fiscal Year 2014 [Member]
Loss Contingencies [Line Items]
Maximum workmen's compensation insurance policy aggregate	1,325
Minimum [Member]
Loss Contingencies [Line Items]
Product liability insurance self insurance retention amount	50
Maximum [Member]
Loss Contingencies [Line Items]
Product liability insurance self insurance retention amount	$ 500