Schedule of Compensation Cost for Stock Options and Unvested Shares (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes				$ 11,162	$ 9,755
Stock Option
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,344	1,359		5,254	5,785
Income tax benefit	(442)	(390)		(1,642)	(1,842)
Total expense after income taxes	902	969		3,612	3,943
Stock Option | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	111	202		593	645
Stock Option | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,233	1,157		4,661	5,140
Unvested Shares
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,642	(1,686)	[1]	5,908	3,970	[1]
Income tax benefit	(412)	(451)	[1]	(1,552)	(1,537)	[1]
Total expense after income taxes	1,230	(2,137)	[1]	4,356	2,433	[1]
Unvested Shares | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	199	197	[1]	802	495	[1]
Unvested Shares | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	$ 1,443	$ (1,883)	[1]	$ 5,106	$ 3,475	[1]

[1] Reflects the forfeiture of unvested shares related to the Company's transition to a new CEO in August 2011.