Cost Reduction Initiatives - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended				9 Months Ended		15 Months Ended
	Jul. 31, 2012	Sep. 30, 2013	Sep. 30, 2013 Cost of sales	Sep. 30, 2012 Cost of sales	Sep. 30, 2013 Cost of sales	Sep. 30, 2012 Cost of sales	Sep. 30, 2013 Operating expenses	Sep. 30, 2012 Operating expenses	Sep. 30, 2013 Operating expenses	Sep. 30, 2012 Operating expenses	Sep. 30, 2013 Cost Reduction Initiatives	Jun. 30, 2013 Cost Reduction Initiatives	Mar. 31, 2013 Cost Reduction Initiatives	Sep. 30, 2012 Cost Reduction Initiatives	Sep. 30, 2013 Cost Reduction Initiatives	Sep. 30, 2012 Cost Reduction Initiatives	Sep. 30, 2013 Cost Reduction Initiatives
Restructuring Cost And Reserve [Line Items]
Pre-tax restructuring charges to cost and expense			$ 1,005,000	$ 27,302,000	$ 7,374,000	$ 28,263,000	$ 853,000	$ 7,782,000	$ 2,991,000	$ 11,492,000	$ 1,858,000	$ 4,998,000	$ 3,509,000	$ 35,084,000	$ 10,365,000	$ 39,755,000	$ 64,426,000
Total future estimated charges, at end of period	68,000,000														3,000,000
Expected annualized pre-tax savings from restructuring plan		60,000,000
Estimated future charges remaining		$ 3,000,000