Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended		9 Months Ended
	Mar. 31, 2012	Sep. 30, 2012	Sep. 30, 2012 Minimum [Member]	Sep. 30, 2012 Maximum [Member]
Loss Contingencies [Line Items]
Occurrences in excess for purchased catastrophic coverage			$ 250	$ 40,000
Losses up to per occurrence related to product liability, automotive, workers' compensation and general liability		250
Liability recorded for such risk insurance reserves		2,711
Aggregate vendors and insurers letters of credit related to product purchases and insurance coverage of product liability, workers' compensation and general liability		5,241
Group health claims up to annual stop loss limit per participant		200
Annual group health insurance claims in excess of expected claims		125.00%
Liability recorded for such group health insurance reserves		1,984
Company agreed to pay Steelworks Hardware LLC in full settlement of all alleged claims and plaintiff legal fees	$ 1,635