Allowance for Losses and Credit Quality of Consumer Loans - Changes in the Allowance of Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Unsecured short-term consumer loans
Allowance for losses on consumer loans
Allowance Balance at Beginning of Period	$ 8,992	$ 13,368	$ 11,498	$ 14,645	$ 14,645
Charge-offs	(1,152)	(7,029)	(4,229)	(16,080)
Recoveries	568	3,495	2,209	6,786
Provision (Benefit)	318	2,862	(500)	7,858
Translation Adjustment	(267)	(479)	(519)	(992)
Allowance Balance at End of Period	8,459	12,217	8,459	12,217	11,498
Financing Receivable at End of Period	10,724	26,265	10,724	26,265
Secured short-term consumer loans
Allowance for losses on consumer loans
Allowance Balance at Beginning of Period	0	1,134	2,004	1,049	1,049
Charge-offs	0	(12,955)	(2,229)	(27,392)
Recoveries	0	11,748	436	24,737
Provision (Benefit)	0	889	(211)	2,422
Translation Adjustment	0	0	0	0
Allowance Balance at End of Period	0	816	0	816	2,004
Financing Receivable at End of Period	0	5,299	0	5,299
Unsecured long-term consumer loans
Allowance for losses on consumer loans
Allowance Balance at Beginning of Period	61,158	42,182	50,645	38,087	38,087
Charge-offs	(469)	(101)	(1,213)	(268)
Recoveries	0	0	0	0
Provision (Benefit)	8,432	4,052	20,234	11,663
Translation Adjustment	478	(1,412)	(67)	(4,761)
Allowance Balance at End of Period	69,599	44,721	69,599	44,721	50,645
Financing Receivable at End of Period	$ 156,369	$ 161,579	$ 156,369	$ 161,579	$ 158,293
Grupo Finmart
Financing Receivable, Allowance for Credit Losses [Line Items]
Reserve on past due loans					100.00%
Grupo Finmart | Unsecured long-term consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum collection period					4 years
Grupo Finmart | Unsecured Long Term Consumer Loans - In Payroll
Financing Receivable, Allowance for Credit Losses [Line Items]
Threshold period past due for write-off of financing receivable					180 days