Condensed Consolidated Statements Of Shareholders' Equity (USD $) In Thousands	Common Stock [Member]	Capital In Excess Of Par [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Non-Controlling Interest [Member]	Total
Balance, value at Jun. 30, 2011	$ 2,020	$ 132,529	$ 833,839	$ 48,323	$ 6,540	$ 1,023,251
Balance, shares at Jun. 30, 2011	80,805
Net income			37,232		151	37,383
Foreign currency translation adjustments, net of tax of $0				(43,768)	(407)	(44,175)
Unrealized gains (losses) on long-term investments, net of tax benefits				(924)		(924)
Share-based compensation		3,005				3,005
Stock issued upon exercise of options, value	1	1,387				1,388
Stock issued upon exercise of options, shares	56
Repurchases of stock, value	(14)	(25,410)				(25,424)
Repurchases of stock, shares	(576)
Income tax benefit from options exercised		268				268
Balance, value at Sep. 30, 2011	2,007	111,779	871,071	3,631	6,284	994,772
Balance, shares at Sep. 30, 2011	80,285
Balance, value at Jun. 30, 2012	2,008	107,662	1,000,822	(17,847)	3,486	1,096,131
Balance, shares at Jun. 30, 2012	80,309					80,309
Net income			41,064		2	41,066
Foreign currency translation adjustments, net of tax of $0				14,826	48	14,874
Unrealized gains (losses) on long-term investments, net of tax benefits				(2)		(2)
Share-based compensation		4,210				4,210
Stock issued upon exercise of options, value	5	4,359				4,364
Stock issued upon exercise of options, shares	201
Repurchases of stock, value	(7)	(13,158)				(13,165)
Repurchases of stock, shares	(276)
Income tax benefit from options exercised		1,407				1,407
Balance, value at Sep. 30, 2012	$ 2,006	$ 104,480	$ 1,041,886	$ (3,023)	$ 3,536	$ 1,148,885
Balance, shares at Sep. 30, 2012	80,234					80,234