Schedule of Compensation Cost for Stock Options and Unvested Shares (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	$ 16,993	$ 13,102	$ 12,076
Stock Option
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	6,268	6,292	6,958
Income tax benefit	(2,016)	(1,988)	(2,208)
Total expense after income taxes	4,252	4,304	4,750
Stock Option | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	479	650	805
Stock Option | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	5,789	5,642	6,153
Unvested Shares
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	9,851	6,810	5,118
Income tax benefit	(2,296)	(1,682)	(1,827)
Total expense after income taxes	7,555	5,128	3,291
Unvested Shares | Cost Of Goods Sold
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	1,380	991	684
Unvested Shares | Selling, General And Administrative Expenses
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total expense before income taxes	$ 8,471	$ 5,819	$ 4,434