GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 14, 2016	Nov. 01, 2016	Sep. 08, 2015	Dec. 02, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 98,723	$ 36,928	$ 98,723	$ 98,898
Goodwill [Roll Forward]
Balance, beginning of period	98,723	36,928
Acquisitions during the period	0	61,970
Write-offs during the period	0	0
Balance, end of period	98,723	98,898
Intangible Assets [Roll Forward]
Balance, beginning of period	52,178	28,921
Acquisitions during the period	38	46,076
Amortization of Intangible Assets	(1,681)	(1,525)
Write-offs during the period	(14)	0
Balance, end of period	50,521	73,472
Amortizable intangible assets [Abstract]
Amount Upon Acquisition			81,820	81,461
Accumulated amortization			(20,508)	(7,989)
Accumulated impairment			(10,791)
Total anticipated intangible amortization	52,178	28,921	50,521	73,472
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining in 2018			6,028
2019			7,151
2020			5,753
2021			5,184
2022			4,262
2023			3,625
Thereafter			18,518
Total anticipated intangible amortization	52,178	28,921	50,521	73,472
Impairment of intangible assets	0	0
AFS/IBEX Financial Services Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill								$ 11,600
Refund Advantage Financial Services Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill					$ 31,400	$ 30,400	$ 25,400
Trademark [Member]
Intangible Assets [Roll Forward]
Balance, beginning of period	10,051	5,149
Acquisitions during the period	0	5,480
Amortization of Intangible Assets	(159)	(120)
Write-offs during the period	0	0
Balance, end of period	9,892	10,509
Amortizable intangible assets [Abstract]
Amount Upon Acquisition			10,990	10,970
Accumulated amortization			(1,098)	(461)
Accumulated impairment			0
Total anticipated intangible amortization	10,051	5,149	9,892	10,509
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total anticipated intangible amortization	$ 10,051	5,149	9,892	10,509
Trademark [Member] | Refund Advantage Financial Services Inc [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Trademark [Member] | Refund Advantage Financial Services Inc [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	15 years
Non-Compete [Member]
Intangible Assets [Roll Forward]
Balance, beginning of period	$ 1,782	127
Acquisitions during the period	0	2,210
Amortization of Intangible Assets	(132)	(86)
Write-offs during the period	0	0
Balance, end of period	1,650	2,251
Amortizable intangible assets [Abstract]
Amount Upon Acquisition			2,480	2,510
Accumulated amortization			(830)	(259)
Accumulated impairment			0
Total anticipated intangible amortization	1,782	127	1,650	2,251
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total anticipated intangible amortization	$ 1,782	127	1,650	2,251
Non-Compete [Member] | Refund Advantage Financial Services Inc [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years
Non-Compete [Member] | Refund Advantage Financial Services Inc [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Customer Relationships [Member]
Intangible Assets [Roll Forward]
Balance, beginning of period	$ 31,707	20,590
Acquisitions during the period	0	32,230
Amortization of Intangible Assets	(1,160)	(1,193)
Write-offs during the period	0	0
Balance, end of period	30,547	51,627
Amortizable intangible assets [Abstract]
Amount Upon Acquisition			57,810	58,270
Accumulated amortization			(17,015)	(6,643)
Accumulated impairment			(10,248)
Total anticipated intangible amortization	31,707	20,590	30,547	51,627
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total anticipated intangible amortization	$ 31,707	20,590	30,547	51,627
Customer Relationships [Member] | Refund Advantage Financial Services Inc [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years
Customer Relationships [Member] | Refund Advantage Financial Services Inc [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	30 years
Other [Member]
Intangible Assets [Roll Forward]
Balance, beginning of period	$ 8,638	3,055
Acquisitions during the period	38	6,156
Amortization of Intangible Assets	(230)	(126)
Write-offs during the period	(14)	0
Balance, end of period	8,432	9,085
Amortizable intangible assets [Abstract]
Amount Upon Acquisition			10,540	9,711
Accumulated amortization			(1,565)	(626)
Accumulated impairment			(543)
Total anticipated intangible amortization	8,638	3,055	8,432	9,085
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total anticipated intangible amortization	$ 8,638	$ 3,055	$ 8,432	$ 9,085
Other [Member] | Refund Advantage Financial Services Inc [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years
Other [Member] | Refund Advantage Financial Services Inc [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	20 years