Consolidated Statement of Shareholders Equity Statement - USD ($) $ in Thousands	Total	Ordinary Shares	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Beginning balance, Shares at Jun. 30, 2014		(44,080,000)	11,751,000
Beginning balance, Value at Jun. 30, 2014	$ 232,457	$ 615	$ (423,101)	$ 309,990	$ 342,840	$ 2,113
Issuance of ordinary shares due to share option exercises, Value	(9,779)		$ 6,689	(16,468)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			672,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(6,448)		$ 4,280	(10,728)
Excess tax benefit from share-based compensation	20,763			20,763
Cancellation of treasury shares, Shares			201,000
Share-based compensation expense	20,724			20,724
Net Income (Loss) Attributable to Parent	92,212				92,212
Net unrealized loss on derivative instruments designated and qualifying as cash flow hedges	(602)					(602)
Marketable Securities, Unrealized Gain (Loss)	(6,275)					(6,275)
Foreign currency translation, net of hedges	(93,757)					(93,757)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(388)					(388)
Ending balance, Shares at Jun. 30, 2015		(44,080,000)	10,878,000
Ending balance, Value at Jun. 30, 2015	248,907	$ 615	$ (412,132)	324,281	435,052	(98,909)
Cumulative Effect of New Accounting Principle in Period of Adoption	2,546			546	2,000
Issuance of ordinary shares due to share option exercises, Value	4,706		$ 5,199	(493)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			120,000
Stock Issued During Period, Value, Acquisitions	8,810		$ 4,900	3,910
Stock Issued During Period, Shares, Acquisitions			112,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(7,469)		$ 3,857	(11,326)
Cancellation of treasury shares, Shares			180,000
Stock Issued During Period, Value, Restricted Stock Award, Gross	0		$ 3,094	(3,094)
Stock Issued During Period, Shares, Restricted Stock Award, Gross			82,000
Share-based compensation expense	21,368			21,368
Treasury Stock, Value, Acquired, Cost Method	(153,467)		$ (153,467)
Treasury Stock, Shares, Acquired			(2,160,000)
Accretion to Redemption Value	(4,919)				(4,919)
Net Income (Loss) Attributable to Parent	54,349				54,349
Net unrealized loss on derivative instruments designated and qualifying as cash flow hedges	(917)					(917)
Marketable Securities, Unrealized Gain (Loss)	517					517
Foreign currency translation, net of hedges	(9,267)					(9,267)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	561					561
Ending balance, Shares at Jun. 30, 2016		(44,080,000)	(12,544,000)
Ending balance, Value at Jun. 30, 2016	$ 165,725	$ 615	$ (548,549)	335,192	486,482	(108,015)
Issuance of ordinary shares due to share option exercises, Shares	495,763
Issuance of ordinary shares due to share option exercises, Value	$ 3,494		$ 6,949	(3,455)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			319,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(7,333)		$ 3,243	(10,576)
Cancellation of treasury shares, Shares			154,000
Share-based compensation expense	43,504			43,504
Treasury Stock, Value, Acquired, Cost Method	(50,008)		$ (50,008)
Treasury Stock, Shares, Acquired			(594,000)
Accretion to Redemption Value	(68)			(68)
Reclassification of mandatorily redeemable noncontrolling interest				(3,357)
Net Income (Loss) Attributable to Parent	(71,711)				(71,711)
Net unrealized loss on derivative instruments designated and qualifying as cash flow hedges	72					72
Marketable Securities, Unrealized Gain (Loss)	(5,756)					(5,756)
Marketable Securities, Gain (Loss)	2,268					2,268
Foreign currency translation, net of hedges	(4,161)					(4,161)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	2,194					2,194
Ending balance, Shares at Jun. 30, 2017		(44,080,000)	12,665,000
Ending balance, Value at Jun. 30, 2017	$ 74,999	$ 615	$ (588,365)	$ 361,376	$ 414,771	$ (113,398)