Finance Receivables, Net - Aging of Finance Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	$ 188,327	$ 256,595
Finance receivables before fair value adjustments		219,865
Fair value premium on non-PCD finance receivables	0	40,251
Non-credit discount on PCD finance receivables	0	(3,521)
Year 2022
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	161,028
Finance receivables before fair value adjustments		0
Year 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	27,299
Finance receivables before fair value adjustments		194,997
Year 2020
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	0
Finance receivables before fair value adjustments		24,868
1 to 30 days past due
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	16,981
Finance receivables before fair value adjustments		18,337
1 to 30 days past due \| Year 2022
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	14,186
Finance receivables before fair value adjustments		0
1 to 30 days past due \| Year 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	2,795
Finance receivables before fair value adjustments		16,077
1 to 30 days past due \| Year 2020
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	0
Finance receivables before fair value adjustments		2,260
31 to 60 days past due
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	9,870
Finance receivables before fair value adjustments		11,672
31 to 60 days past due \| Year 2022
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	8,048
Finance receivables before fair value adjustments		0
31 to 60 days past due \| Year 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	1,822
Finance receivables before fair value adjustments		10,024
31 to 60 days past due \| Year 2020
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	0
Finance receivables before fair value adjustments		1,648
61 to 90 days past due
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	8,347
Finance receivables before fair value adjustments		9,376
61 to 90 days past due \| Year 2022
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	6,597
Finance receivables before fair value adjustments		0
61 to 90 days past due \| Year 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	1,750
Finance receivables before fair value adjustments		7,898
61 to 90 days past due \| Year 2020
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	0
Finance receivables before fair value adjustments		1,478
Past due
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	35,198
Finance receivables before fair value adjustments		39,385
Past due \| Year 2022
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	28,831
Finance receivables before fair value adjustments		0
Past due \| Year 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	6,367
Finance receivables before fair value adjustments		33,999
Past due \| Year 2020
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	0
Finance receivables before fair value adjustments		5,386
Current
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	153,129
Finance receivables before fair value adjustments		180,480
Current \| Year 2022
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	132,197
Finance receivables before fair value adjustments		0
Current \| Year 2021
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	20,932
Finance receivables before fair value adjustments		160,998
Current \| Year 2020
Financing Receivable, Past Due [Line Items]
Finance receivables, amortized cost	$ 0
Finance receivables before fair value adjustments		$ 19,482

Finance Receivable, before Allowance for Credit Loss, Premium and Discount

No definition available.

Name:	fcfs_FinanceReceivableBeforeAllowanceForCreditLossPremiumAndDiscount
Namespace Prefix:	fcfs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Premium on non-PCD finance receivables

+ References

No definition available.

+ Details

Name:	fcfs_PremiumOnNonPCDFinanceReceivables
Namespace Prefix:	fcfs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

+ Details

Name:	us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph (a)

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	fcfs_OriginationYearAxis=fcfs_Year2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	fcfs_OriginationYearAxis=fcfs_Year2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	fcfs_OriginationYearAxis=fcfs_Year2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables1To29DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: