Revolving Line of Credit	12 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]
Revolving Line of Credit	Revolving Line of Credit On August 19, 2021, we amended our credit agreement with a syndicate of banks, increasing our borrowing capacity under the unsecured revolving line of credit to $600 million and extended its maturity to August 19, 2026. Borrowings under the credit facility can be used for working capital and general corporate purposes and may also be used for the refinancing of existing debt, acquisitions, and the repurchase of our common stock. Interest on amounts borrowed under the credit facility is based on (i) an adjusted base rate, which is the greatest of (a) the prime rate and (b) the Federal Funds rate plus 0.500% and (c) the one-month LIBOR rate plus 1.000%, plus, in each case, an applicable margin, or (ii) an adjusted LIBOR rate plus an applicable margin. The applicable margin for base rate borrowings ranges from 0% to 0.750% and for LIBOR borrowings ranges from 1.000% to 1.750% and is determined based on our consolidated leverage ratio. In addition, we must pay credit facility fees. The credit facility contains certain restrictive covenants, including maintaining a maximum consolidated leverage ratio of 3.50, subject to a step up to 4.00 following certain permitted acquisitions; and a minimum interest coverage ratio of 3.00. The credit agreement also contains other covenants typical of unsecured facilities. As of September 30, 2021, we had $518.0 million in borrowings outstanding at a weighted-average interest rate of 1.212% and we were in compliance with all financial covenants under this credit facility. In October 2021, we further amended the credit agreement. See Note 23 for additional information.

On August 19, 2021, we amended our credit agreement with a syndicate of banks, increasing our borrowing capacity under the unsecured revolving line of credit to $600 million and extended its maturity to August 19, 2026. Borrowings under the credit facility can be used for working capital and general corporate purposes and may also be used for the refinancing of existing debt, acquisitions, and the repurchase of our common stock. Interest on amounts borrowed under the credit facility is based on (i) an adjusted base rate, which is the greatest of (a) the prime rate and (b) the Federal Funds rate plus 0.500% and (c) the one-month LIBOR rate plus 1.000%, plus, in each case, an applicable margin, or (ii) an adjusted LIBOR rate plus an applicable margin. The applicable margin for base rate borrowings ranges from 0% to 0.750% and for LIBOR borrowings ranges from 1.000% to 1.750% and is determined based on our consolidated leverage ratio. In addition, we must pay credit facility fees. The credit facility contains certain restrictive covenants, including maintaining a maximum consolidated leverage ratio of 3.50, subject to a step up to 4.00 following certain permitted acquisitions; and a minimum interest coverage ratio of 3.00. The credit agreement also contains other covenants typical of unsecured facilities. As of September 30, 2021, we had $518.0 million in borrowings outstanding at a weighted-average interest rate of 1.212% and we were in compliance with all financial covenants under this credit facility.