Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Building available for sale Cost Reduction Initiatives	Sep. 30, 2012 Building available for sale Cost Reduction Initiatives	Sep. 30, 2012 Write-off Amortizing Intangibles and Goodwill Cost Reduction Initiatives	Sep. 30, 2012 Write-off Amortizing Intangibles and Goodwill Cost Reduction Initiatives	Sep. 30, 2012 Write-off Property Plant and Equipment Cost Reduction Initiatives	Sep. 30, 2012 Write-off Property Plant and Equipment Cost Reduction Initiatives
Financial Instruments [Line Items]
Asset impairment charges	$ 17,056,000	$ 5,413,000	$ 7,939,000	$ 7,939,000	$ 5,156,000	$ 5,156,000	$ 11,317,000	$ 11,317,000