Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Condensed Consolidated Statements Of Income [Abstract]
Net revenue	$ 601,273	$ 530,397	$ 1,124,932	$ 995,846
Cost of sales (excluding amortization of acquired intangible assets)	251,481	221,326	469,535	417,592
Gross profit	349,792	309,071	655,397	578,254
Operating expenses:
Selling, general and administrative	151,816	139,307	295,666	268,158
Research and development	40,643	38,190	78,058	72,637
Restructuring expenses		4,413		4,413
Litigation settlement expenses		8,500		8,500
Acquisition related expenses		10,076		10,076
Amortization of acquired intangible assets	11,317	11,690	23,099	23,431
Total operating expenses	203,776	212,176	396,823	387,215
Income from operations	146,016	96,895	258,574	191,039
Other income (loss), net:
Interest income	4,579	4,191	9,449	8,065
Interest expense	(7,370)	(6,628)	(15,155)	(12,994)
Other, net	(1,460)	1,749	(2,618)	3,021
Total other income (loss), net	(4,251)	(688)	(8,324)	(1,908)
Income before income taxes	141,765	96,207	250,250	189,131
Income taxes	132,238	19,464	154,599	36,282
Net income	$ 9,527	$ 76,743	$ 95,651	$ 152,849
Basic earnings per share (note 11)	$ 0.07	$ 0.54	$ 0.67	$ 1.08
Diluted earnings per share (note 11)	0.07	0.54	0.67	1.08
Dividend declared per share	$ 0.35	$ 0.33	$ 0.70	$ 0.66
Basic shares outstanding (000's)	142,715	141,310	142,511	141,048
Diluted shares outstanding (000's)	143,855	142,097	143,757	141,982