Note 12 - Long-term Debt	6 Months Ended
Feb. 28, 2015
Disclosure Text Block [Abstract]
Long-term Debt [Text Block]	12. Long-Term Debt On May 5, 2011, the Company entered into a $250.0 million unsecured revolving credit agreement (the “Credit Agreement”) with a syndicate of banks, which matures on May 4, 2016. Under the Credit Agreement, the Company is able to borrow funds at variable interest rates based on, at the Company’s election, the Eurodollar rate or a base rate, plus in each case a spread based on the Company’s consolidated funded debt ratio. Availability of credit requires compliance with certain financial and other covenants, including a maximum consolidated funded debt ratio and minimum consolidated interest coverage ratio as defined in the Credit Agreement. The Company tests its compliance with these financial covenants on a fiscal quarterly basis. At February 28, 2015, the interest rates applicable to the Company’s borrowings under the Credit Agreement would be calculated as LIBOR plus 75 basis points at the time of the respective borrowing. As of February 28, 2015, the Company had no outstanding borrowings, outstanding letters of credit amounting to $53.2 million and $196.8 million available for borrowing under the Credit Agreement. On September 14, 2006, the Company issued $100.0 million of floating rates notes (“Floating Rate Notes”) pursuant to a Note Purchase Agreement, which bore interest at LIBOR plus 50 basis points. On September 14, 2013, the Floating Rate Notes matured and were repaid in full from the Company’s cash reserves. As of February 28, 2015, the Company was in compliance with all covenants under the Credit Agreement.

Note 12 - Long-term Debt

6 Months Ended

Feb. 28, 2015

12. Long-Term Debt

On May 5, 2011, the Company entered into a $250.0 million unsecured revolving credit agreement (the “Credit Agreement”) with a syndicate of banks, which matures on May 4, 2016. Under the Credit Agreement, the Company is able to borrow funds at variable interest rates based on, at the Company’s election, the Eurodollar rate or a base rate, plus in each case a spread based on the Company’s consolidated funded debt ratio. Availability of credit requires compliance with certain financial and other covenants, including a maximum consolidated funded debt ratio and minimum consolidated interest coverage ratio as defined in the Credit Agreement. The Company tests its compliance with these financial covenants on a fiscal quarterly basis. At February 28, 2015, the interest rates applicable to the Company’s borrowings under the Credit Agreement would be calculated as LIBOR plus 75 basis points at the time of the respective borrowing. As of February 28, 2015, the Company had no outstanding borrowings, outstanding letters of credit amounting to $53.2 million and $196.8 million available for borrowing under the Credit Agreement.

On September 14, 2006, the Company issued $100.0 million of floating rates notes (“Floating Rate Notes”) pursuant to a Note Purchase Agreement, which bore interest at LIBOR plus 50 basis points. On September 14, 2013, the Floating Rate Notes matured and were repaid in full from the Company’s cash reserves.

As of February 28, 2015, the Company was in compliance with all covenants under the Credit Agreement.