Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, Amount at Jun. 30, 2011	$ 587,394	$ 123,608	$ 460,157	$ 3,629
Beginning Balance, Shares at Jun. 30, 2011		27,109,932
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	74,288		74,288
Unrealized gain on hedged transaction, net of tax	139			139
Foreign currency translation adjustment	(25,459)			(25,459)
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		494,908
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes	7,642	7,642
Share based compensation	7,004	7,004
Tax benefit of deductible compensation arising from exercise or vesting of share based payment arrangements	1,303	1,303
Ending Balance, Amount at Jun. 30, 2012	652,311	139,557	534,445	(21,691)
Ending Balance, Shares at Jun. 30, 2012		27,604,840
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	34,662		34,662
Unrealized gain on hedged transaction, net of tax	0			0
Foreign currency translation adjustment	(1,281)			(1,281)
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		366,969
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes	4,024	4,024
Share based compensation	5,692	5,692
Tax benefit of deductible compensation arising from exercise or vesting of share based payment arrangements	548	548
Ending Balance, Amount at Jun. 30, 2013	695,956	149,821	569,107	(22,972)
Ending Balance, Shares at Jun. 30, 2013	27,971,809	27,971,809
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	81,789		81,789
Unrealized gain on hedged transaction, net of tax	0
Foreign currency translation adjustment	6,272			6,272
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		567,672
Exercise of stock options and shares issued under share-based compensation plans, net of shares withheld for employee taxes	12,581	12,581
Share based compensation	5,328	5,328
Tax benefit of deductible compensation arising from exercise or vesting of share based payment arrangements	717	717
Ending Balance, Amount at Jun. 30, 2014	$ 802,643	$ 168,447	$ 650,896	$ (16,700)
Ending Balance, Shares at Jun. 30, 2014	28,539,481	28,539,481