Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Condensed Consolidated Statements Of Income [Abstract]
Net revenue	$ 651,100	$ 601,273	$ 1,239,380	$ 1,124,932
Cost of sales (excluding amortization of acquired intangible assets)	267,369	251,481	512,556	469,535
Gross profit	383,731	349,792	726,824	655,397
Operating expenses:
Selling, general and administrative	161,579	151,816	308,881	295,666
Research and development	43,111	40,643	81,902	78,058
Amortization of acquired intangible assets	15,840	11,317	28,707	23,099
Acquisition related expenses	6,123		6,123
Total operating expenses	226,653	203,776	425,613	396,823
Income from operations	157,078	146,016	301,211	258,574
Other income (loss), net:
Interest income	678	4,579	1,600	9,449
Interest expense	(7,487)	(7,370)	(11,195)	(15,155)
Other, net	(621)	(1,460)	(3,086)	(2,618)
Total other income (loss), net	(10,805)	(4,251)	(16,056)	(8,324)
Income before income taxes	146,273	141,765	285,155	250,250
Income taxes	21,634	132,238	54,778	154,599
Loss attributable to equity method investments (note 6)	(3,375)		(3,375)
Net income	$ 124,639	$ 9,527	$ 230,377	$ 95,651
Basic earnings per share (note 11)	$ 0.87	$ 0.07	$ 1.61	$ 0.67
Diluted earnings per share (note 11)	0.86	0.07	1.60	0.67
Dividend declared per share	$ 0.37	$ 0.35	$ 0.74	$ 0.70
Basic shares outstanding (000's)	142,923,000	142,715,000	142,796,000	142,511,000
Diluted shares outstanding (000's)	144,349,000.00	143,855,000.00	144,418,000.00	143,757,000.00