Allowance for Losses and Credit Quality of Consumer Loans - Aging Analysis (Details) - Unsecured long-term consumer loans - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Aging analysis of past due financing receivables
Investment past due	$ 81,597	$ 69,041	$ 45,775
Current Receivable	80,811	89,252	110,208
Translation Adjustment	270	0	1,385
Total Financing Receivable	162,678	158,293	157,368
Allowance Balance	61,158	50,645	42,182	$ 38,087
Recorded Investment 90 Days Accruing	3,921	5,766	1,337
1-30
Aging analysis of past due financing receivables
Investment past due	11,245	7,336	6,752
31-60
Aging analysis of past due financing receivables
Investment past due	8,936	6,880	6,241
61-90
Aging analysis of past due financing receivables
Investment past due	6,373	7,389	3,152
90
Aging analysis of past due financing receivables
Investment past due	55,043	47,436	29,630
Performing loans
Aging analysis of past due financing receivables
Investment past due	27,610	25,504	12,376
Current Receivable	78,914	87,272	107,414
Translation Adjustment	270	0	1,387
Total Financing Receivable	106,794	112,776	121,177
Allowance Balance	5,274	5,128	5,989
Recorded Investment 90 Days Accruing	3,921	5,766	1,337
Performing loans \| 1-30
Aging analysis of past due financing receivables
Investment past due	10,360	6,783	5,068
Performing loans \| 31-60
Aging analysis of past due financing receivables
Investment past due	7,883	6,179	4,231
Performing loans \| 61-90
Aging analysis of past due financing receivables
Investment past due	5,446	6,776	1,740
Performing loans \| 90
Aging analysis of past due financing receivables
Investment past due	3,921	5,766	1,337
Non-performing loans
Aging analysis of past due financing receivables
Investment past due	53,987	43,537	33,399
Current Receivable	1,897	1,980	2,794
Translation Adjustment	0	0	(2)
Total Financing Receivable	55,884	45,517	36,191
Allowance Balance	55,884	45,517	36,193
Recorded Investment 90 Days Accruing	0	0	0
Non-performing loans \| 1-30
Aging analysis of past due financing receivables
Investment past due	885	553	1,684
Non-performing loans \| 31-60
Aging analysis of past due financing receivables
Investment past due	1,053	701	2,010
Non-performing loans \| 61-90
Aging analysis of past due financing receivables
Investment past due	927	613	1,412
Non-performing loans \| 90
Aging analysis of past due financing receivables
Investment past due	$ 51,122	$ 41,670	$ 28,293

Financing Receivable Fair Value Adjustment

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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- References

No definition available.

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524

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- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

+ Details

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- Definition

Amount before allowance of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(a),(b))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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