Line Of Credit Facility, Option To Increase, Maximum Amount

No definition available.

Name:	ufcs_LineOfCreditFacilityOptionToIncreaseMaximumAmount
Namespace Prefix:	ufcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

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+ Details

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

- 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

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+ Details

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

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

- 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

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=ufcs_NewCreditAgreementMember
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_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	srt_CounterpartyNameAxis=ufcs_FederatedMutualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=ufcs_FederatedLifeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT (Narrative) (Details) - USD ($)	3 Months Ended
DEBT (Narrative) (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020	Dec. 15, 2020
Line of Credit Facility [Line Items]
Interest expense incurred	$ 797,000
Outstanding balance on credit facility	0	$ 0
New Credit Agreement
Line of Credit Facility [Line Items]
Option to increase, maximum amount		100,000,000
New Credit Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Interest expense incurred	0	0
Maximum borrowing capacity		50,000,000
New Credit Agreement \| Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		20,000,000
New Credit Agreement \| Swing Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 5,000,000
Surplus Notes
Line of Credit Facility [Line Items]
Principal amount			$ 50,000,000
Interest expense incurred	$ 797,000
Surplus Notes \| Federated Mutual
Line of Credit Facility [Line Items]
Principal amount			35,000,000
Surplus Notes \| Federated Life
Line of Credit Facility [Line Items]
Principal amount			$ 15,000,000