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Finance Receivables - Additional Information (Detail) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrual period for financing receivables		60 days
Aggregate unpaid principal balance		$ 415,933	$ 402,180
Fair value of receivables	[1]	466,465	457,296
Finance receivables at amortized cost in non-accrual status		$ 38	$ 100
Recency delinquency
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrual period for financing receivables		60 days
Contractual delinquency
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrual period for financing receivables		90 days	90 days
90+ days
Financing Receivable, Allowance for Credit Loss [Line Items]
Aggregate unpaid principal balance		$ 15,900	$ 17,600
Fair value of receivables		$ 2,500	$ 2,700
[1] (1) Includes amounts in consolidated variable interest entities ("VIEs") presented separately in the table below.

X

- Definition

Financing Receivable, After Allowance for Credit Loss, Before Fair Value Option Adjustment

+ References

No definition available.

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- Definition

Finance receivables at fair value.

+ References

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- Definition

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+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

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- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)
-Publisher SEC

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-7

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