Accrued Liabilities (Details) - USD ($)	Sep. 30, 2019	Sep. 30, 2018
Accrued Liabilities
Compensation and benefits	$ 63,005,000	$ 61,182,000
Deferred revenue	18,165,000	18,450,000
Interest payable	17,951,000	23,008,000
Rental obligations	11,670,000	12,129,000
Insurance reserves	4,567,000	4,816,000
Property and other taxes	3,869,000	4,607,000
Loss contingency obligation	0	14,294,000
Operating accruals and other	49,827,000	41,801,000
Total accrued liabilities	$ 169,054,000	$ 180,287,000