Debt (Policy)	6 Months Ended
Dec. 31, 2011
Debt [Abstract]
Debt	At December 31, 2011 and June 30, 2011, we had an unsecured revolving credit facility under which we may borrow up to a maximum of $160 million at any one time, with the potential to expand the total credit availability to $260 million based on obtaining consent of the issuing bank and certain other conditions. The facility expires in October 2012, and all outstanding amounts are then due and payable. At December 31, 2011 and June 30, 2011, we had no borrowings outstanding under this facility. Loans may be used for general corporate purposes. At December 31, 2011, we had approximately $6.7 million of standby letters of credit outstanding, which reduced the amount available for borrowing on the unsecured revolving credit facility.

Debt (Policy)

6 Months Ended

Dec. 31, 2011

At December 31, 2011 and June 30, 2011, we had an unsecured revolving credit facility under which we may borrow up to a maximum of $160 million at any one time, with the potential to expand the total credit availability to $260 million based on obtaining consent of the issuing bank and certain other conditions. The facility expires in October 2012, and all outstanding amounts are then due and payable. At December 31, 2011 and June 30, 2011, we had no borrowings outstanding under this facility. Loans may be used for general corporate purposes. At December 31, 2011, we had approximately $6.7 million of standby letters of credit outstanding, which reduced the amount available for borrowing on the unsecured revolving credit facility.