Stock Purchase And Award Plans (Tables)

12 Months Ended

Dec. 31, 2011

Stock Purchase And Award Plans [Abstract]

Summary Of Employee Stock-Based Compensation Expense

	Years Ended December 31,
	2011		2010		2009
	(In thousands)
Selling, general and administrative	$	26,310	$	16,694	$	14,958
Research and development expense		404		426		492
Cost of product revenues		91		89		130
Total employee stock-based compensation expense		26,805		17,209		15,580
Total tax benefit related to employee stock-based compensation expense		10,468		7,006		6,253
Net effect on net income	$	16,337	$	10,203	$	9,327

Summary Of Weighted-Average Assumptions

	Years Ended December 31,
	2011	2010	2009
Dividend yield	0%	0%	0%
Expected volatility	28%	30%	29%
Risk free interest rate	2.47%	2.82%	2.0%
Expected life of option from grant date	8 years	8 years	8 years

Summary Of Stock Option Activity

Stock Options	Shares			Weighted Average Exercise Price		Weighted Average Contractual Term in Years		Aggregate Intrinsic Value
	(In thousands)							(In thousands)
Outstanding at December 31, 2010		1,560			$38.13
Granted		34			50.78
Exercised		(100	)		34.43
Forfeited or Expired		(11	)		36.60
Outstanding at December 31, 2011		1,483			$38.68		4.4		$270
Vested or expected to vest at December 31, 2011		1,483			$38.68		4.4		$270
Exercisable at December 31, 2011		1,465			$38.54		4.4		$270

Summary Of Vested And Unvested RSU

	Restricted Stock Awards					Performance Stock and Contract Stock Awards
	Shares			Wtd. Avg. Grant Date Fair Value Per Share		Shares			Wtd. Avg Grant Date Fair Value Per Share
	(In thousands)			(In thousands)
Unvested, December 31, 2010		413			$34.98		277			$40.74
Granted		122			47.48		361			40.29
Cancellations		(35	)		37.99		(6	)		40.66
Released		(195	)		36.95		(9	)		44.51
Vested but not released		—			—		(479	)		43.83
Unvested, December 31, 2011		305			$38.37		144			$29.15