Schedule of Compensation Cost for Stock Options, Unvested Shares and Performance Share Units (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes			$ 13,464	$ 11,162
Stock Option
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,332	1,344	5,044	5,254
Income tax benefit	(439)	(442)	(1,620)	(1,642)
Total expense after income taxes	893	902	3,424	3,612
Stock Option | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	94	111	385	593
Stock Option | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,238	1,233	4,659	4,661
Unvested Shares
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	2,415	1,642	7,786	5,908
Income tax benefit	(551)	(412)	(1,864)	(1,552)
Total expense after income taxes	1,864	1,230	5,922	4,356
Unvested Shares | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	338	199	1,065	802
Unvested Shares | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	2,077	1,443	6,721	5,106
Performance Shares
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	229		634
Income tax benefit	(82)		(195)
Total expense after income taxes	147		439
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	$ 229		$ 634