XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.24.1.1.u2

Note 9 - Notes Payable (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | May 31, 2022 | Nov. 30, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Oct. 31, 2020 | Mar. 31, 2024 | Mar. 31, 2023 | Feb. 29, 2024 | Dec. 31, 2023 | May 31, 2023 | Aug. 31, 2022 | Jan. 31, 2021 | Aug. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Oct. 31, 2015
Long-Term Line of Credit |  |  |  |  |  |  |  |  |  | $ 1,839,521 |  |  |  | $ 1,838,647 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  |  |  |  |  |  |  |  | $ 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  |  |  |  |  |  |  | 41 months |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  |  |  |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  |  |  |  |  |  |  |  | 4.10% |  |  |  |  |  |  |  |  |  |  |  |  |
Term Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17,400 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |  |
Second Term Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | $ 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Line of Credit |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 2.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  |  |  |  |  | 24 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 6.125% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  |  |  |  |  | 400 |  | $ 400 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount |  |  |  |  |  |  |  |  |  | 400 |  | $ 0 |  |  |  |  |  |  |  |  |  |
Senior Notes 2029 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 9.25% |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 57,200 |  |  |  |  |  |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring October 30, 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 50,000 | [1] |  |  | 50,000 |  |  |  |  |  |  |  | $ 50,000
Long-Term Line of Credit | [2],[3],[4],[5] |  |  |  |  |  |  |  |  | 29,800 | [1] |  |  | 38,600 |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring November 1, 2025 1[Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 65,000 |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Line of Credit |  |  |  |  |  |  |  |  |  | 44,100 |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring July 20, 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 50,000 | [1] |  |  | 50,000 |  |  |  |  |  |  | $ 50,000 |
Long-Term Line of Credit | [2],[3],[4],[5] |  |  |  |  |  |  |  |  | 37,900 | [1] |  |  | 47,500 |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring December 15, 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 100,000 | [1] |  |  | 100,000 |  |  |  |  |  | $ 100,000 |  |
Long-Term Line of Credit | [2],[3],[4],[5],[6] |  |  |  |  |  |  |  |  | 0 | [1] |  |  | 0 |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring December 11, 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 20,000 | [1] |  |  | 20,000 |  |  |  |  | $ 20,000 |  |  |
Long-Term Line of Credit | [2],[3],[4],[5] |  |  |  |  |  |  |  |  | 10,900 | [1] |  |  | 14,300 |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring July 31, 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 35,000 | [1] |  |  | 35,000 |  |  | $ 35,000 |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4],[5] |  |  |  |  |  |  |  |  | 15,000 | [1] |  |  | 15,000 |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring December 15, 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 300,000 | [1] |  |  | 300,000 |  |  |  |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4],[6] |  |  |  |  |  |  |  |  | 300,000 | [1] |  |  | 300,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  |  |  |  |  |  |  | 4.24% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring December 15, 2026 [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  |  |  |  |  |  | 11 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring December 15, 2026 [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  |  |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring May 15, 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 300,000 | [1] |  |  | 300,000 |  |  |  |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4],[6] |  |  |  |  |  |  |  |  | 300,000 | [1] |  |  | 300,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  |  |  |  |  | 3.53% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring January 15, 2029 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 325,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Line of Credit |  |  |  |  |  |  |  |  |  | 325,000 |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  |  |  |  | 6.33% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring August 5, 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |
Long-Term Line of Credit |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring March 15, 2027 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 100,000 | [1] |  |  | 100,000 |  |  |  |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4],[6] |  |  |  |  |  |  |  |  | 100,000 | [1] |  |  | 100,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  |  |  | 7.32% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring May 26, 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 20,000 | [1] |  |  | 20,000 | $ 20,000 |  |  |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4] |  |  |  |  |  |  |  |  | 0 | [1] |  |  | 0 |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring February 15, 2028 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 300,000 | [1] |  |  | 300,000 |  |  |  |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4],[6] |  |  |  |  |  |  |  |  | 300,000 | [1] |  |  | 300,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  |  | 18 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  |  | 9.51% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Expiring May 17, 2027 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | 150,000 | [1] |  |  | 150,000 |  |  |  |  |  |  |  |
Long-Term Line of Credit | [2],[3],[4],[6] |  |  |  |  |  |  |  |  | $ 150,000 | [1] |  |  | $ 150,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure (Month) |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Term of Revolving Structure, Subsequent Amortization Period (Month) |  | 18 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Backed Securities, Weighted Average Interest Rate |  | 9.39% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prime Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Variable Rate |  |  |  |  |  |  |  |  |  | 8.50% |  |  |  |  |  |  |  |  |  |  |  |
Prime Rate [Member] | Revolving Credit Facility Expiring July 31, 2026 [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Variable Rate |  |  |  |  |  |  |  |  |  | 5.34% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | Revolving Credit Facility Expiring October 30, 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | Revolving Credit Facility Expiring November 1, 2025 1[Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 2.25% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | Revolving Credit Facility Expiring November 1, 2025 1[Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 2.60% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | Revolving Credit Facility Expiring July 20, 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 3.60% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | Revolving Credit Facility Expiring December 15, 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | August 2022 Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 1.80% |  |  |  |  |  |  |  |  |  |  |  |
Secured Overnight Financing Rate (SOFR) [Member] | Revolving Credit Facility Expiring May 26, 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  |
[1] | As of March 31, 2024, the Prime Rate was 8.50% and the Secured Overnight Financing Rate ("SOFR") was 5.34%.
[2] | Loans are associated with VIEs. See Note 7, "Variable Interest Entities" for more information.
[3] | Loans are subject to certain affirmative covenants tied to default rates and other performance metrics the failure of which could result in required early repayment of the remaining unamortized balances of the notes.
[4] | See below for additional information.
[5] | These notes reflect modifications to either extend the maturity date, increase the loan amount or both, and are treated as accounting modifications.
[6] | Creditors do not have recourse against the general assets of the Company but only to the collateral within the VIEs.

X
- Definition Represents the term of the revolving structure associated with asset backed securities. + References No definition available. + Details
Name: | atlc_AssetBackedSecuritiesTermOfRevolvingStructure
Namespace Prefix: | atlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the subsequent amortization period in connection with the term of a revolving structure associated with asset backed securities. + References No definition available. + Details
Name: | atlc_AssetBackedSecuritiesTermOfRevolvingStructureSubsequentAmortizationPeriod
Namespace Prefix: | atlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average interest rate of asset backed securities. + References No definition available. + Details
Name: | atlc_AssetBackedSecuritiesWeightedAverageInterestRate
Namespace Prefix: | atlc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The variable rate used for a debt instrument. + References No definition available. + Details
Name: | atlc_DebtInstrumentVariableRate
Namespace Prefix: | atlc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-3 + Details
Name: | us-gaap_AmortizationOfFinancingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 + Details
Name: | us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=atlc_TermNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=atlc_SecondTermFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=atlc_SeniorNotes2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=atlc_SeniorNotes2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringOctober302025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringNovember120251Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringJuly202025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringDecember152025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringDecember112024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringJuly312026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringDecember152026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringMay152026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringJanuary152029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringAugust52024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringMarch152027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringMay262026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringFebruary152028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_RevolvingCreditFacilityExpiringMay172027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=atlc_August2022RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |