Schedule of Compensation Cost for Stock Options, Unvested Shares and Performance Share Units (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes			$ 9,489	$ 8,176
Stock Option
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,352	1,651	3,712	3,910
Income tax benefit	(445)	(492)	(1,182)	(1,200)
Total expense after income taxes	907	1,159	2,530	2,710
Stock Option | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	99	189	291	482
Stock Option | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,253	1,462	3,421	3,428
Unvested Shares
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	2,310	1,864	5,372	4,266
Income tax benefit	(609)	(477)	(1,319)	(1,140)
Total expense after income taxes	1,701	1,387	4,053	3,126
Unvested Shares | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	212	197	614	603
Unvested Shares | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	2,098	1,667	4,758	3,663
Performance Shares
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	216		405
Income tax benefit	(77)		(114)
Total expense after income taxes	139		291
Performance Shares | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	0		0
Performance Shares | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	$ 216		$ 405