CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares and Additional Paid in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income	Non-Controlling Interests	Adjustment	Adjustment Retained Earnings
Beginning balance (in shares) at Jun. 30, 2017		264,060,000	(1,102,000)
Beginning balance at Jun. 30, 2017	$ 3,533,319	$ 1,613,454	$ (27,520)	$ 1,897,624	$ 48,800	$ 961
Issuance of Common Shares
Under employee stock option plans (in shares)		2,870,000
Under employee stock option plans	54,355	$ 54,355
Under employee stock purchase plans (in shares)		721,000
Under employee stock purchase plans	20,458	$ 20,458
Share-based compensation	$ 27,594	27,594
Purchase of treasury stock (in shares)	0
Issuance of treasury stock	$ 0	$ (8,788)	$ 8,788
Issuance of treasury stock (in shares)	411,276		411,000
Dividends declared	$ (145,613)			(145,613)
Other comprehensive income - net	(15,155)				(15,155)
Net income for the year	242,300			242,224		76
Ending balance (in shares) at Jun. 30, 2018		267,651,000	(691,000)
Ending balance at Jun. 30, 2018	$ 3,717,258	$ 1,707,073	$ (18,732)	1,994,235	33,645	1,037
Ending balance (Cumulative effect of ASU 2016-16) at Jun. 30, 2018							$ (26,780)	$ (26,780)
Ending balance (Cumulative effect of Topic 606) at Jun. 30, 2018							$ 29,786	$ 29,786
Issuance of Common Shares
Under employee stock option plans (in shares)	1,472,031	1,472,000
Under employee stock option plans	$ 35,626	$ 35,626
Under employee stock purchase plans (in shares)		711,000
Under employee stock purchase plans	21,835	$ 21,835
Share-based compensation	$ 26,770	26,770
Purchase of treasury stock (in shares)	(726,059)		(726,000)
Purchase of treasury stock	$ (26,499)		$ (26,499)
Issuance of treasury stock	$ 0	(16,465)	$ 16,465
Issuance of treasury stock (in shares)	613,524		614,000
Dividends declared	$ (168,859)			(168,859)
Other comprehensive income - net	(9,521)				(9,521)
Non-controlling interest	(583)	$ (625)				42
Net income for the year	285,637			285,501		136
Ending balance (in shares) at Jun. 30, 2019		269,834,000	(803,000)
Ending balance at Jun. 30, 2019	$ 3,884,670	$ 1,774,214	$ (28,766)	2,113,883	24,124	1,215
Issuance of Common Shares
Under employee stock option plans (in shares)	1,529,947	1,530,000
Under employee stock option plans	$ 41,282	$ 41,282
Under employee stock purchase plans (in shares)		499,000
Under employee stock purchase plans	17,757	$ 17,757
Share-based compensation	$ 29,532	29,532
Purchase of treasury stock (in shares)	(300,000)		(300,000)
Purchase of treasury stock	$ (12,424)		$ (12,424)
Issuance of treasury stock	$ 6,574	$ (11,008)	$ 17,582
Issuance of treasury stock (in shares)	480,574		481,000
Dividends declared	$ (188,712)			(188,712)
Other comprehensive income - net	(6,299)				(6,299)
Non-controlling interest	(39)					(39)
Net income for the year	234,368			234,225		143
Ending balance (in shares) at Jun. 30, 2020		271,863,000	(622,000)
Ending balance at Jun. 30, 2020	$ 4,006,709	$ 1,851,777	$ (23,608)	$ 2,159,396	$ 17,825	$ 1,319