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Finance Receivables - Summary of portfolio delinquencies by origination fiscal year (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	$ 87,569
Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	76,747
Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	10,822
2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,134
2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,593
2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	31,249
2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	26,798
2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6,073
2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	31,183
2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	25,176
2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,385
2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	11,903
2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	11,573
2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	330
2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,623
2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,134
2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	30
Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,477
Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,473
Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4
Current
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	73,034
Current | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	63,916
Current | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	9,118
Current | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,779
Current | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,471
Current | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
Current | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	26,369
Current | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	21,988
Current | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,128
Current | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	25,676
Current | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	21,241
Current | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,688
Current | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	10,018
Current | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	9,748
Current | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	270
Current | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,499
Current | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,779
Current | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	28
Current | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,693
Current | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,689
Current | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4
30-59
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	9,286
30-59 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	8,280
30-59 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,006
30-59 | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	232
30-59 | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	744
30-59 | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
30-59 | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,917
30-59 | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,101
30-59 | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	580
30-59 | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,481
30-59 | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,337
30-59 | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	380
30-59 | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,369
30-59 | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,324
30-59 | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	45
30-59 | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	745
30-59 | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	232
30-59 | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
30-59 | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	542
30-59 | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	542
30-59 | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,043
60-89 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,611
60-89 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	432
60-89 | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	72
60-89 | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	256
60-89 | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89 | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,092
60-89 | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,000
60-89 | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	227
60-89 | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,195
60-89 | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	865
60-89 | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	195
60-89 | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	292
60-89 | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	282
60-89 | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	10
60-89 | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	256
60-89 | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89 | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89 | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	136
60-89 | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	136
60-89 | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,206
90-120 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,940
90-120 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	266
90-120 | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	51
90-120 | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	122
90-120 | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	871
90-120 | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	709
90-120 | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	138
90-120 | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	831
90-120 | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	733
90-120 | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	122
90-120 | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	224
90-120 | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	219
90-120 | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	123
90-120 | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	106
90-120 | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	106
90-120 | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	$ 0

X

- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-80

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
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-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-7

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-14

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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-Paragraph 80
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