Condensed Consolidated Statement Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Jun. 30, 2011	$ 451	$ 582,972	$ 295,886	$ (19,750)	$ 7,144	$ 866,703	[1]
Balance, shares at Jun. 30, 2011	45,045,097			1,144,610		45,045,097
Net income			31,728			31,728
Foreign currency translation adjustments, net of tax					(14,959)	(14,959)
Change in deferred gains on cash flow hedging instruments, net of tax					806	806
Change in unrealized loss on available for sale investment, net of tax					(976)	(976)
Total comprehensive income						16,599
Issuance of common stock pursuant to compensation plans	4	7,292				7,296
Issuance of common stock pursuant to compensation plans, shares	459,900
Stock based compensation income tax effects		2,660				2,660
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans				(1,373)		(1,373)
Shares withheld for payment of employee payroll taxes due on shares issued under stock based compensation plans, shares				42,105
Stock based compensation charge		3,763				3,763
Balance at Dec. 31, 2011	$ 455	$ 596,687	$ 327,614	$ (21,123)	$ (7,985)	$ 895,648
Balance, shares at Dec. 31, 2011	45,504,997			1,186,715		45,504,997

[1] The balance sheet at June 30, 2011 has been derived from the audited financial statements at that date.