Goodwill and Other Asset Impairments - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2012
Goodwill And Other Intangible Assets [Line Items]
Valuation impairment charge of the Hopland California facility		$ 2,100,000	$ 2,100,000
Impairment of Goodwill		19,700,000
Impairment of other intangibles assets		200,000
Goodwill and other asset impairments	$ 22,000,000		$ 22,012,000