Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]

No definition available.

Name:	ufcs_ShareBasedCompensationArrangementByShareBasedPaymentAwardAvailableForGrantRollForward
Namespace Prefix:	ufcs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of share-based compensation awards forfeited or expired in Period

+ References

No definition available.

+ Details

Name:	ufcs_ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeituresAndExpirationInPeriod
Namespace Prefix:	ufcs_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period, Gross

+ References

No definition available.

+ Details

Name:	ufcs_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantsInPeriodGross
Namespace Prefix:	ufcs_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of additional shares authorized for issuance under share-based payment arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(02)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: 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(28))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PlanNameAxis=ufcs_EmployeeStockAwardPlan2008Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=ufcs_UnrestrictedStockAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=ufcs_DirectorPlan2005Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock-Based Compensation - Stock Award Plans (Details) - shares	1 Months Ended		12 Months Ended	168 Months Ended
	May 31, 2021	May 31, 2014	Dec. 31, 2022	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Number of option awards exercised (in shares)			59,943
Employee Stock Award Plan-2008
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Beginning balance (in shares)			1,317,819	1,900,000
Additional shares authorized (in shares)	650,000	1,500,000	0	2,150,000
Number of awards granted (in shares)			(171,385)	(3,622,141)
Number of awards forfeited or expired (in shares)			195,685	914,260
Ending balance (in shares)			1,342,119	1,342,119
Employee Stock Award Plan-2008 \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Number of option awards exercised (in shares)			51,363	1,533,336
Employee Stock Award Plan-2008 \| Unrestricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Number of awards granted (in shares)			0	(10,090)
Employee Stock Award Plan-2008 \| Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Number of restricted stock awards vested (in shares)			49,984	267,845
Director Plan - 2005
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Beginning balance (in shares)			144,352	300,000
Additional shares authorized (in shares)			0	150,000
Number of awards granted (in shares)			(22,860)	(355,238)
Number of awards forfeited or expired (in shares)			1,905	28,635
Ending balance (in shares)			123,397	123,397
Director Plan - 2005 \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Number of option awards exercised (in shares)			8,580	150,581
Director Plan - 2005 \| Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]
Number of restricted stock awards vested (in shares)			18,510	117,001