Less [Abstract]

No definition available.

Name:	conn_LessAbstract
Namespace Prefix:	conn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt discount (premium).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28567-108399

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

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

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_FinanceLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt and lease obligation, including portion classified as current.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2018AVIEClassANotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2018AVIEClassBNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2018AVIEClassCNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2019AVIEClassANotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2019AVIEClassBNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2019AVIEClassCNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2019BVIEClassANotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2019BVIEClassBNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2019BVIEClassCNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2020AVIEClassANotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2020AVIEClassBNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2020AVIEClassCNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=conn_A2017BClassCNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt and Financing Lease Obligations - Schedule of Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Oct. 16, 2020	Jan. 31, 2020
Long-term debt [Abstract]
Long-term debt	$ 574,609
Financing lease obligations	5,665		$ 5,209
Total debt and financing lease obligations	807,274		1,034,341
Less:
Discount on debt	(983)		(1,404)
Deferred debt issuance costs	(4,936)		(6,797)
Current maturities of long-term debt and financing lease obligations	(769)		(605)
Long-term debt and financing lease obligations	800,586		1,025,535
Original principal amount	1,466,150
2018-A VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	2,029
Less:
Original principal amount	$ 219,200
Contractual Interest Rate	3.25%
2018-A VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 2,861
Less:
Original principal amount	$ 69,550
Contractual Interest Rate	4.65%
2018-A VIE Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 2,861
Less:
Original principal amount	$ 69,550
Contractual Interest Rate	6.02%
2019-A VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 27,393
Less:
Original principal amount	$ 254,530
Contractual Interest Rate	3.40%
2019-A VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 35,180
Less:
Original principal amount	$ 64,750
Contractual Interest Rate	4.36%
2019-A VIE Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 33,963
Less:
Original principal amount	$ 62,510
Contractual Interest Rate	5.29%
2019-B VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 61,412
Less:
Original principal amount	$ 317,150
Contractual Interest Rate	2.66%
2019-B VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 85,540
Less:
Original principal amount	$ 85,540
Contractual Interest Rate	3.62%
2019-B VIE Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 83,270
Less:
Original principal amount	$ 83,270
Contractual Interest Rate	4.60%
2020-A VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 174,900
Less:
Original principal amount	$ 174,900	$ 174,900
Contractual Interest Rate	1.71%
2020-A VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 65,200
Less:
Original principal amount	$ 65,200	65,200
Contractual Interest Rate	4.27%
2020-A VIE Class C Notes [Member]
Less:
Original principal amount		$ 62,900
Contractual Interest Rate		7.10%
Senior Notes [Member]
Long-term debt [Abstract]
Long-term debt	$ 227,000		227,000
Secured Debt [Member]
Long-term debt [Abstract]
Long-term debt	574,600
Secured Debt [Member] \| 2017-B Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	0		59,655
Secured Debt [Member] \| 2018-A VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	2,029		34,112
Secured Debt [Member] \| 2018-A VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	2,861		20,572
Secured Debt [Member] \| 2018-A VIE Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	2,861		20,572
Secured Debt [Member] \| 2019-A VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	27,393		76,241
Secured Debt [Member] \| 2019-A VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	35,180		64,750
Secured Debt [Member] \| 2019-A VIE Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	33,963		62,510
Secured Debt [Member] \| 2019-B VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	61,412		265,810
Secured Debt [Member] \| 2019-B VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	85,540		85,540
Secured Debt [Member] \| 2019-B VIE Class C Notes [Member]
Long-term debt [Abstract]
Long-term debt	83,270		83,270
Secured Debt [Member] \| 2020-A VIE Class A Notes [Member]
Long-term debt [Abstract]
Long-term debt	174,900		0
Secured Debt [Member] \| 2020-A VIE Class B Notes [Member]
Long-term debt [Abstract]
Long-term debt	65,200		0
Revolving Credit Facility [Member]
Less:
Deferred debt issuance costs	(4,100)		(3,500)
Revolving Credit Facility [Member] \| Line of Credit [Member]
Long-term debt [Abstract]
Long-term debt	$ 0		$ 29,100