Consolidated Statement Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Jun. 30, 2012	$ 338	$ 337,740	$ 217,354	$ (74,871)	$ 1,166	$ 481,727
Balance, shares at Jun. 30, 2012	33,789			(4,353)
Issuance of common stock upon exercise of options, net of tax withholdings of $1,444	3	3,067				3,070
Issuance of common stock upon exercise of options, net of tax withholdings of $1,444, shares	339
Issuance of common stock for employee stock purchase plan		1,057				1,057
Issuance of common stock for employee stock purchase plan, shares	37
Issuance of restricted stock, net of forfeitures and tax withholdings of $2,748		(2,748)				(2,748)
Issuance of restricted stock, net of forfeitures and tax withholdings of $2,748, shares	(30)
Amortization of share-based awards		2,848				2,848
Excess tax benefit from share-based awards		4,905				4,905
Comprehensive Income:
Net Income			46,993			46,993
Foreign currency translation adjustments					1,069	1,069	[1]
Net unrealized cash flow hedging gain					18	18	[2]
Balance at Dec. 31, 2012	$ 341	$ 346,869	$ 264,347	$ (74,871)	$ 2,253	$ 538,939
Balance, shares at Dec. 31, 2012	34,135			(4,353)

[1] Foreign currency translation adjustments are not adjusted for income taxes since they relate to indefinite investments in non-U.S. subsidiaries.

[2] Net of tax expense of $121 for the three months ended December 31, 2012 and net of tax benefit of $212 for the three months ended December 31, 2011. Net of tax benefit of $58 for the six months ended December 31, 2012 and net of tax expense of $686 for the six months ended December 31, 2011.