Consolidated Statements Of Shareholders' Equity (USD $) In Thousands	Common Stock At Par Value [Member]		Additional Paid-In Capital [Member]	Treasury Stock [Member]		Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]		Total
Beginning Balance at Jun. 30, 2008	$ 1,198	[1]	$ 1,338,302			$ 77,362	$ (24,685)		$ 1,392,177
Issuance of common stock			14						14
Comprehensive income:
Net income						104,405			104,405
Foreign currency translation							(1,147)		(1,147)
Reclassification into earnings on interest rate swaps, net of tax							14,422		14,422
Periodic revaluation of interest rate swaps, net of tax							(24,218)		(24,218)
Net change in interest rate swaps							(9,796)		(9,796)
Comprehensive income									93,462
Ending Balance at Jun. 30, 2009	1,198	[1]	1,338,316			181,767	(35,628)		1,485,653
Initial public offerring and exercise of stock options, including corresponding tax benefit	231	[1]	389,470						389,701
Share-based compensation			21,670						21,670
Common stock repurchased for treasury				(2,207)	[1]				(2,207)
Comprehensive income:
Net income						168,506			168,506
Foreign currency translation							458		458
Reclassification into earnings on interest rate swaps, net of tax							23,795		23,795
Periodic revaluation of interest rate swaps, net of tax							(10,881)		(10,881)
Net change in interest rate swaps							12,914		12,914
Comprehensive income									181,878
Ending Balance at Jun. 30, 2010	1,429	[1]	1,749,456	(2,207)	[1]	350,273	(22,256)	[2]	2,076,695
Exercise of stock options including corresponding tax benefit	2	[1]	1,322						1,324
Share-based compensation			11,070						11,070
Common stock repurchased for treasury				(224,719)	[1]				(224,719)
Comprehensive income:
Net income						229,508			229,508
Foreign currency translation							1,165		1,165
Reclassification into earnings on interest rate swaps, net of tax							23,802		23,802
Periodic revaluation of interest rate swaps, net of tax							(14,901)		(14,901)
Net change in interest rate swaps							8,901		8,901
Comprehensive income									239,574
Ending Balance at Jun. 30, 2011	$ 1,431	[1]	$ 1,761,848	$ (226,926)	[1]	$ 579,781	$ (12,190)	[2]	$ 2,103,944

[1] There were 600,000,000 authorized shares of par value $0.01 common stock at June 30, 2011 and 2010. Common stock outstanding and treasury stock balances and activity were as follows for the periods indicated.

[2] The balance in accumulated other comprehensive loss at June 30, 2011 and 2010 was comprised of $12.5 million and $21.4 million of cumulative unrealized losses on interest rate swaps, net of tax, respectively and $0.3 million and $(0.9) million of a cumulative foreign currency translation gain/(loss), respectively.