CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
NET SALES	$ 1,703,230		$ 1,303,942		$ 1,143,299
COST OF SALES	808,921		623,702		530,983
GROSS PROFIT	894,309		680,240		612,316
OPERATING EXPENSES	437,886		332,426		275,007
OPERATING INCOME	456,423		347,814		337,309
OTHER INCOME (EXPENSE):
Interest and other income, net	1,619		2,246		2,273
Loss on investments and put option, net (Note 2)	(772)		(758)		(3,887)
Total other income (expense)	847		1,488		(1,614)
INCOME BEFORE PROVISION FOR INCOME TAXES	457,270		349,302		335,695
PROVISION FOR INCOME TAXES	171,051		137,273		126,979
NET INCOME	$ 286,219		$ 212,029		$ 208,716
NET INCOME PER COMMON SHARE:
Basic (in dollars per share)	$ 1.62	[1]	$ 1.20	[1]	$ 1.16	[1]
Diluted (in dollars per share)	$ 1.53	[1]	$ 1.14	[1]	$ 1.10	[1]
WEIGHTED AVERAGE NUMBER OF SHARES OF COMMON STOCK AND COMMON STOCK EQUIVALENTS:
Basic (in shares)	176,212	[1]	177,028	[1]	179,934	[1]
Diluted (in shares)	186,674	[1]	186,042	[1]	189,286	[1]

[1] Stock Split - On January 11, 2012, the Company announced that its Board of Directors had approved a two-for-one stock split of its common stock to be effected in the form of a 100% stock dividend. The stock dividend was issued on February 15, 2012. See Note 1 for additional information.