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, 2010	$ 2,001	$ 117,462	$ 689,750	$ (25,833)	$ 6,232	$ 789,612
Balance, shares at Jun. 30, 2010	80,042
Net income			63,944		251	64,195
Foreign currency translation adjustments, net of tax of $0				37,452	514	37,966
Unrealized losses on long-term investments, net of tax				668		668
Noncontrolling interest put arrangement			30			30
Purchase of minority interest					(682)	(682)
Dividends to noncontrolling interest					(292)	(292)
Share-based compensation		6,961				6,961
Stock issued upon exercise of options, value	24	16,455				16,479
Stock issued upon exercise of options, shares	959
Repurchases of stock, value	(4)	(6,393)				(6,397)
Repurchases of stock, shares	(145)
Income tax benefit from options exercised		5,082				5,082
Balance, value at Dec. 31, 2010	2,021	139,567	753,724	12,287	6,023	913,622
Balance, shares at Dec. 31, 2010	80,856
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					80,805
Net income			75,517		49	75,566
Foreign currency translation adjustments, net of tax of $0				(57,973)	(547)	(58,520)
Unrealized losses on long-term investments, net of tax				(860)		(860)
Noncontrolling interest put arrangement						0
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					79,921