Debt Narrative (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2012	Jun. 30, 2012
Debt Instrument [Line Items]
Revolving Credit Facility, Current Borrowing Capacity	$ 150,000
Revolving Credit Facility, Maximum Borrowing Capacity	250,000
Revolving Credit Facility, Expiration Date	Jun. 04, 2015
Revolving Credit Facility, Amount Outstanding	0
Term Loan, Original Principal Balance	150,000
Term Loan, Quarterly Principal Payments	5,625
Term Loan, Date Of First Required Payment	Sep. 30, 2011
Current maturities of long-term debt	28,705	25,297
Maturity Date	Jun. 04, 2015
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate at Period End	2.37%
Current maturities of long-term debt	22,500
Credit Facility Points Above Federal Funds Rate [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.50%
Credit Facility Points Above LIBOR [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.00%
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Current maturities of long-term debt	6,060
Unsecured Debt [Member]
Debt Instrument [Line Items]
Interest Rate at Period End	2.25%
Issuance Date	Apr. 29, 2012
Amount Outstanding	0
Maturity Date	Apr. 29, 2014
Unused Borrowing Capacity	$ 5,000
Basis Spread on Variable Rate	(1.00%)