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			75,517		49	75,566
Foreign currency translation adjustments, net of tax of $0				(57,973)	(547)	(58,520)
Unrealized gains (losses) on long-term investments, net of tax benefits				(860)		(860)
Share-based compensation		8,781				8,781
Stock issued upon exercise of options, value	5	3,055				3,060
Stock issued upon exercise of options, shares	192
Repurchases of stock, value	(27)	(48,422)				(48,449)
Repurchases of stock, shares	(1,076)
Income tax benefit from options exercised		1,408				1,408
Balance, value at Dec. 31, 2011	1,998	97,351	909,356	(10,510)	6,042	1,004,237
Balance, shares at Dec. 31, 2011	79,921
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			85,150		206	85,356
Foreign currency translation adjustments, net of tax of $0				22,553	50	22,603
Unrealized gains (losses) on long-term investments, net of tax benefits				2,683		2,683
Acquisition of non-controlling interest		(197)			(649)	(846)
Share-based compensation		11,526				11,526
Stock issued upon exercise of options, value	6	4,649				4,655
Stock issued upon exercise of options, shares	228
Repurchases of stock, value	(30)	(53,342)				(53,372)
Repurchases of stock, shares	(1,196)
Income tax benefit from options exercised		(1,475)				(1,475)
Balance, value at Dec. 31, 2012	$ 1,984	$ 71,773	$ 1,085,972	$ 7,389	$ 3,093	$ 1,170,211
Balance, shares at Dec. 31, 2012	79,341					79,341