Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Income tax expense	$ 22,736,000	$ 6,598,000	$ 37,603,000	$ 14,283,000
Effective income tax rate	27.70%	11.10%	25.90%	15.10%
Gross deferred tax assets	440,100,000		440,100,000
Deferred tax liabilities	51,000,000		51,000,000
Valuation allowance against deferred tax assets	161,600,000		161,600,000
Unrecognized tax benefits	32,100,000		32,100,000
Interest related to unrecognized tax benefit			1,000,000
Unrecognized tax benefit that would affect the tax rate if recognized	1,700,000		1,700,000
Tax reserves on uncertain tax positions	700,000		1,200,000
Additional interest expense on uncertain tax positions	$ 100,000		$ 200,000