Unaudited Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2013

The Company's unaudited quarterly results are summarized below (in thousands, except per share data):

			First		Second		Third		Fourth
2013			Quarter		Quarter		Quarter		Quarter		Total
Net sales			$	430,338	$	451,115	$	457,317	$	565,448	$	1,904,218
Cost of sales				174,568		188,329		191,568		228,991		783,456
	Gross profit			255,770		262,786		265,749		336,457		1,120,762
Selling and administrative expenses				118,660		123,062		120,563		130,680		492,965
Research and development expenses				25,312		24,650		23,599		26,975		100,536
Purchased intangibles amortization				2,393		2,382		2,518		2,625		9,918
	Operating income			109,405		112,692		119,069		176,177		517,343
Other expense (Note 3)				-		(1,575)		-		-		(1,575)
Interest expense				(7,185)		(7,580)		(7,358)		(7,927)		(30,050)
Interest income				1,187		1,179		946		1,075		4,387
	Income from operations before
		income taxes		103,407		104,716		112,657		169,325		490,105
Provision for income tax (benefit) expense				(17,652)		15,402		14,609		27,743		40,102
	Net income		$	121,059	$	89,314	$	98,048	$	141,582	$	450,003
Net income per basic common share				1.41		1.04		1.15		1.67		5.27
Weighted-average number of basic
	common shares			86,049		85,482		85,185		85,006		85,426
Net income per diluted common share				1.39		1.03		1.14		1.65		5.20
Weighted-average number of diluted
	common shares and equivalents			87,215		86,576		86,364		86,017		86,546

			First		Second		Third		Fourth
2012			Quarter		Quarter		Quarter		Quarter		Total
Net sales			$	420,458	$	451,465	$	449,952	$	521,766	$	1,843,641
Cost of sales				167,290		179,259		182,702		208,363		737,614
	Gross profit			253,168		272,206		267,250		313,403		1,106,027
Selling and administrative expenses				117,119		122,682		115,322		122,147		477,270
Research and development expenses				23,347		23,943		23,756		24,958		96,004
Purchased intangibles amortization				2,485		2,458		6,427		2,459		13,829
Litigation provisions				-		3,000		-		4,434		7,434
	Operating income			110,217		120,123		121,745		159,405		511,490
Interest expense				(6,491)		(6,878)		(7,107)		(7,597)		(28,073)
Interest income				769		1,031		1,184		1,224		4,208
	Income from operations before
		income taxes		104,495		114,276		115,822		153,032		487,625
Provision for income tax expense (benefit)				15,829		16,552		16,713		(22,912)		26,182
	Net income		$	88,666	$	97,724	$	99,109	$	175,944	$	461,443
Net income per basic common share				1.00		1.11		1.13		2.03		5.25
Weighted-average number of basic
	common shares			88,992		88,317		87,411		86,712		87,841
Net income per diluted common share				0.98		1.09		1.12		2.00		5.19
Weighted-average number of diluted
	common shares and equivalents			90,269		89,381		88,451		87,851		88,979