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
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Unsecured Short-term consumer loans [Member]
Allowance for losses on consumer loans
Allowance Balance at Beginning of Period	$ 13,368	$ 2,848	$ 14,645	$ 2,928
Charge-offs	(7,029)	(16,601)	(16,080)	(28,803)
Recoveries	3,495	16,689	6,786	20,884
Provision (Benefit)	2,862	5,644	7,858	13,559
Translation Adjustment	(479)	5	(992)	17
Allowance Balance at End of Period	12,217	8,585	12,217	8,585
Financing Receivable at End of Period	26,265	26,815	26,265	26,815
Secured Short-term consumer loans [Member]
Allowance for losses on consumer loans
Allowance Balance at Beginning of Period	1,134	2,332	1,049	1,804
Charge-offs	(12,955)	(18,382)	(27,392)	(32,571)
Recoveries	11,748	16,573	24,737	31,755
Provision (Benefit)	889	1,291	2,422	826
Translation Adjustment	0	0	0	0
Allowance Balance at End of Period	816	1,814	816	1,814
Financing Receivable at End of Period	5,299	7,959	5,299	7,959	$ 8,173
Unsecured Long-term consumer loans [Member]
Allowance for losses on consumer loans
Allowance Balance at Beginning of Period	42,182	23,889	38,087	19,849
Charge-offs	(101)	(18)	(268)	(89)
Recoveries	0	0	0	0
Provision (Benefit)	4,052	3,099	11,663	7,108
Translation Adjustment	(1,412)	(5)	(4,761)	97
Allowance Balance at End of Period	44,721	26,965	44,721	26,965
Financing Receivable at End of Period	$ 161,579	$ 143,362	$ 161,579	$ 143,362	$ 162,860