Cost Reduction Initiatives - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 31, 2012	Jun. 30, 2013	Jun. 30, 2013 Cost of Sales	Jun. 30, 2012 Cost of Sales	Jun. 30, 2013 Cost of Sales	Jun. 30, 2012 Cost of Sales	Jun. 30, 2013 Operating Expense	Jun. 30, 2012 Operating Expense	Jun. 30, 2013 Operating Expense	Jun. 30, 2012 Operating Expense	Jun. 30, 2013 Cost Reduction Initiatives	Mar. 31, 2013 Cost Reduction Initiatives	Jun. 30, 2012 Cost Reduction Initiatives	Jun. 30, 2013 Cost Reduction Initiatives	Jun. 30, 2012 Cost Reduction Initiatives	Jun. 30, 2013 Cost Reduction Initiatives
Restructuring Cost And Reserve [Line Items]
Total future estimated charges, at end of period	$ 65,000,000	$ 2,400,000												$ 2,400,000
Pre-tax restructuring charges to cost and expense			4,087,000	937,000	6,369,000	961,000	911,000	3,706,000	2,138,000	3,710,000	4,998,000	3,509,000	4,643,000	8,507,000	4,671,000	62,568,000
Expected annualized pre-tax savings from restructuring plan		$ 60,000,000