Reinsurance retention one-time risk fee amount.

No definition available.

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Namespace Prefix:	cnfr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of earned premiums ceded to other entities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 235
-Section S99
-Paragraph 2
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of written premiums ceded to other entities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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

- Definition

Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred and costs incurred in the claim settlement process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
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-URI https://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 310
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+ Details

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

- Definition

Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to and paid by the ceding insurer.

+ References

+ Details

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

- Definition

Amount per policy of risk undertaken originally by insurer that is not ceded to reinsurer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387

+ Details

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

- Definition

Amount per policy of risk ceded to reinsurer in excess of risk undertaken originally by insurer that is not ceded to reinsurer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Reinsurance - Narrative (Q1) (Details) - USD ($)		3 Months Ended		12 Months Ended
Reinsurance - Narrative (Q1) (Details) - USD ($)	Nov. 01, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2022	Dec. 31, 2019
Effects Of Reinsurance [Line Items]
Ceded premium written		$ 17,872,000	$ 14,943,000	$ 46,787,000	$ 30,666,000	$ 18,395,000
Ceded premiums earned		12,342,000	8,809,000	38,690,000	24,248,000	17,511,000
Reinsurance recoverables on paid losses		9,023,000		6,653,000	1,347,000
Stated net reserves retained		84,261,000	100,333,000	82,888,000	98,741,000	87,052,000		$ 84,667,000
Losses and loss adjustment expenses, net		13,713,000	18,018,000	81,440,000	69,861,000	56,228,000
Prior period		1,213,000	5,521,000	24,284,000	19,432,000	15,594,000
Reinsurance recoverables on unpaid losses		61,101,000	40,605,000	82,651,000	40,344,000	24,218,000		$ 22,579,000
Accident Year 2019
Effects Of Reinsurance [Line Items]
Prior period			$ 1,300,000	9,600,000
Loss Portfolio Transfer ("LPT") Reinsurance Agreement
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses		3,000,000		3,800,000
Reinsurance recoverables on unpaid losses		22,000,000		25,900,000
Loss Portfolio Transfer ("LPT") Reinsurance Agreement \| Minimum
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses	$ 46,300,000
Fleming Reinsurance Ltd \| Loss Portfolio Transfer ("LPT") Reinsurance Agreement
Effects Of Reinsurance [Line Items]
Stated net reserves retained							$ 40,800,000
Losses and loss adjustment expenses, net	5,500,000
Amount reinsured	40,800,000
One-time risk fee retained							5,400,000
Fleming Reinsurance Ltd \| Loss Portfolio Transfer ("LPT") Reinsurance Agreement \| Maximum
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses	66,300,000
Fleming Reinsurance Ltd \| Loss Portfolio Transfer ("LPT") Reinsurance Agreement \| Minimum
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses	46,300,000
Fleming Reinsurance Ltd \| Loss Portfolio Transfer ("LPT") Reinsurance Agreement \| Accident Year 2019
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses							66,300,000
Stated net reserves retained							$ 40,800,000
Prior period	$ 20,000,000
100% Cede of Commercial Liability Risks In Excess of $400,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)		400,000		340,000	400,000	400,000
Corridor \| Agreement Between Cic And Wpic And Fleming Re
Effects Of Reinsurance [Line Items]
Losses and loss adjustment expenses, net		5,500,000		5,500,000
Layer \| Agreement Between Cic And Wpic And Fleming Re \| Maximum
Effects Of Reinsurance [Line Items]
Losses and loss adjustment expenses, net		20,000,000		20,000,000
Layer \| Agreement Between Cic And Wpic And Fleming Re \| Minimum
Effects Of Reinsurance [Line Items]
Losses and loss adjustment expenses, net		2,400,000		644,000
Ceded Commercial Property Risks In Excess of $200,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)		400,000		300,000
Ceded Homeowners Specific Risks In Excess of $300,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)		$ 300,000		300,000	300,000	300,000
Ceded Commercial Property Risks In Excess of $400,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)				300,000	200,000
Hurricane
Effects Of Reinsurance [Line Items]
Ceded premium written				1,600,000	86,000	195,000
Ceded premiums earned				$ 1,600,000	$ 86,000	$ 195,000