COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Lease Obligations
Rents charged to expense under operating leases	$ 6,100,000	$ 5,700,000
Minimum future lease commitments
2019	6,307,616
2020	4,671,779
2021	3,731,591
2022	3,026,818
2023	2,153,584
Thereafter	3,814,291
Total minimum lease payments	23,705,679
Self-insured liabilities reserve
Liabilities for workers' compensation, general liability and health insurance	1,600,000	1,500,000
Beginning balance	1,500,000	1,300,000
Charged to expense	5,800,000	6,500,000
Payments	(5,700,000)	(6,300,000)
Ending balance	$ 1,600,000	$ 1,500,000