GOODWILL AND INTANGIBLE ASSETS Schedule of Intangible Asses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Finite-lived Intangible Assets [Roll Forward]
Balance as of September 30, 2018			$ 70,719	$ 52,178
Acquisitions during the period			78	47
Amortization during the period			(9,978)	(4,412)
Impairment on rental equipment			(313)	(89)
Balance as of March 31, 2019	$ 60,506	$ 47,724	60,506	47,724
Gross carrying amount					$ 109,859	$ 81,830
Accumulated amortization					(38,446)	(23,240)
Accumulated impairment					(10,907)	(10,866)
Balance as of March 31, 2019	60,506	47,724	70,719	52,178	60,506	47,724
Asset impairment charges	100	0	0	0
Other Intangible Assets
Finite-lived Intangible Assets [Roll Forward]
Balance as of September 30, 2018			7,980	8,638
Acquisitions during the period			78	47
Amortization during the period			(487)	(456)
Impairment on rental equipment			(313)	(89)
Balance as of March 31, 2019	7,258	8,140	7,258	8,140
Gross carrying amount					10,667	10,550
Accumulated amortization					(2,750)	(1,792)
Accumulated impairment					(659)	(618)
Balance as of March 31, 2019	7,258	8,140	7,980	8,638	7,258	8,140
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Balance as of September 30, 2018			48,455	31,707
Acquisitions during the period			0	0
Amortization during the period			(8,742)	(3,388)
Impairment on rental equipment			0	0
Balance as of March 31, 2019	39,713	28,319	39,713	28,319
Gross carrying amount					82,088	57,810
Accumulated amortization					(32,127)	(19,243)
Accumulated impairment					(10,248)	(10,248)
Balance as of March 31, 2019	39,713	28,319	48,455	31,707	39,713	28,319
Noncompete Agreements
Finite-lived Intangible Assets [Roll Forward]
Balance as of September 30, 2018			1,297	1,782
Acquisitions during the period			0	0
Amortization during the period			(235)	(249)
Impairment on rental equipment			0	0
Balance as of March 31, 2019	1,062	1,533	1,062	1,533
Gross carrying amount					2,480	2,480
Accumulated amortization					(1,418)	(947)
Accumulated impairment					0	0
Balance as of March 31, 2019	1,062	1,533	1,297	1,782	1,062	1,533
Trademarks
Finite-lived Intangible Assets [Roll Forward]
Balance as of September 30, 2018			12,987	10,051
Acquisitions during the period			0	0
Amortization during the period			(514)	(319)
Impairment on rental equipment			0	0
Balance as of March 31, 2019	12,473	9,732	12,473	9,732
Gross carrying amount					14,624	10,990
Accumulated amortization					(2,151)	(1,258)
Accumulated impairment					0	0
Balance as of March 31, 2019	$ 12,473	$ 9,732	$ 12,987	$ 10,051	$ 12,473	$ 9,732
Refund Advantage Financial Services Inc | Noncompete Agreements
Finite-lived Intangible Assets [Roll Forward]
Useful life			3 years
Refund Advantage Financial Services Inc | Trademarks
Finite-lived Intangible Assets [Roll Forward]
Useful life			15 years
Minimum | Refund Advantage Financial Services Inc | Other Intangible Assets
Finite-lived Intangible Assets [Roll Forward]
Useful life			3 years
Minimum | Refund Advantage Financial Services Inc | Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Useful life			10 years
Maximum | Refund Advantage Financial Services Inc | Other Intangible Assets
Finite-lived Intangible Assets [Roll Forward]
Useful life			20 years
Maximum | Refund Advantage Financial Services Inc | Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Useful life			30 years