Condensed Consolidated Statement Of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Jun. 30, 2011	$ 866,703	$ 451	$ 582,972	$ 295,886	$ (19,750)	$ 7,144
Balance, shares at Jun. 30, 2011	45,045,097	45,045,097			1,144,610
Net income	55,835			55,835
Foreign currency translation adjustments, net of tax	(2,648)					(2,648)
Change in deferred gains on cash flow hedging instruments, net of tax	616					616
Change in unrealized loss on available for sale investment, net of tax	(820)					(820)
Total comprehensive income	52,983
Issuance of common stock pursuant to compensation plans	12,464	8	12,456
Issuance of common stock pursuant to compensation plans, shares		874,916
Stock based compensation income tax effects	6,083		6,083
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans	(2,026)				2,026
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans, shares					58,002
Stock based compensation charge	6,321		6,321
Balance at Mar. 31, 2012	$ 942,528	$ 459	$ 607,832	$ 351,721	$ (21,776)	$ 4,292
Balance, shares at Mar. 31, 2012	45,920,013	45,920,013			1,202,612