Long-term Debt (Details) (USD $)	Dec. 31, 2011	Jun. 30, 2011
Debt Instrument [Line Items]
Long-term Debt	$ 250,000,000	$ 195,000,000
Long-term Debt, Current Maturities	(50,000,000)	(50,000,000)
Long-term Debt, Excluding Current Maturities	200,000,000	145,000,000
Intercompany receivables, interest rate at period end	3.25%
Line of Credit [Member] | Asset Backed Bank Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	75,000,000	70,000,000
Line of Credit Facility, Maximum Borrowing Capacity	100,000,000
Accounts Receivable Oustanding Under Revolving Agreement	154,700,000
Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	50,000,000	0
Line of Credit Facility, Maximum Borrowing Capacity	150,000,000
Senior Notes [Member] | Senior Notes Due 2012 [Member]
Debt Instrument [Line Items]
Long-term Debt	50,000,000	50,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.04%
Senior Notes [Member] | Senior Notes Due 2013 [Member]
Debt Instrument [Line Items]
Long-term Debt	50,000,000	50,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.70%
Senior Notes [Member] | Senior Notes Due 2014 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 25,000,000	$ 25,000,000
Debt Instrument, Interest Rate, Stated Percentage	7.19%