COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Lease Obligations
Rents charged to expense under operating leases	$ 5,700,000	$ 5,500,000
Minimum future lease commitments
2018	5,444,675
2019	4,552,452
2020	3,618,693
2021	2,608,271
2022	2,074,661
Thereafter	3,733,399
Total minimum lease payments	22,032,151
Self-insured liabilities reserve
Liabilities for workers' compensation, general liability and health insurance	1,500,000	1,300,000
Beginning balance	1,300,000	1,600,000
Charged to expense	6,500,000	5,700,000
Payments	6,300,000	6,000,000
Ending balance	$ 1,500,000	$ 1,300,000