Derivative interest rate cap payment received or accrued from counter parties.

No definition available.

Name:	uht_DerivativeInterestRateCapPaymentReceivedOrAccruedFromCounterParties
Namespace Prefix:	uht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line of credit facility expiration year and month.

+ References

No definition available.

+ Details

Name:	uht_LineOfCreditFacilityExpirationYearAndMonth
Namespace Prefix:	uht_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit increase in borrowing capacity.

+ References

No definition available.

+ Details

Name:	uht_LineOfCreditIncreaseInBorrowingCapacity
Namespace Prefix:	uht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Margin on base rate.

+ References

No definition available.

+ Details

Name:	uht_MarginOnBaseRate
Namespace Prefix:	uht_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Mortgage debt.

+ References

No definition available.

+ Details

Name:	uht_MortgageDebt
Namespace Prefix:	uht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of extension options.

+ References

No definition available.

+ Details

Name:	uht_NumberOfExtensionOptions
Namespace Prefix:	uht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Premiums paid for derivatives.

+ References

No definition available.

+ Details

Name:	uht_PremiumsPaidForDerivatives
Namespace Prefix:	uht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateTerms
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Data Type:	xbrli:stringItemType
Balance Type:	na
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

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

+ Details

Name:	us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
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

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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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- Details

Name:	us-gaap_CreditFacilityAxis=uht_RevolvingCreditAgreementMember
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Debt and Financial Instruments - Additional Information (Detail)			3 Months Ended			6 Months Ended		12 Months Ended	33 Months Ended	36 Months Ended
	Apr. 02, 2019 USD ($)	Mar. 27, 2018 USD ($) Option	Mar. 31, 2019 USD ($)	Sep. 30, 2016 USD ($) Derivative	Jun. 30, 2016 USD ($) Derivative	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Outstanding borrowings under revolving credit agreement						$ 191,550,000		$ 196,400,000
Available borrowing capacity						108,400,000		103,600,000
Repayments of mortgage loan						3,351,000	$ 22,585,000
Interest Rate Cap
Debt Instrument [Line Items]
Number of interest rate cap agreements \| Derivative				1	1
Notional amount				$ 30,000,000	$ 30,000,000	$ 60,000,000
Premium paid				$ 55,000	$ 115,000
Expiration date of interest rate cap				Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2019
Derivative interest rate cap, payment received or accrued from counterparties			$ 61,000					144,000	$ 205,000	$ 205,000
Level 2
Debt Instrument [Line Items]
Mortgage loan fair value						$ 64,100,000		64,900,000
Mortgage debt								$ 65,300,000
Vibra Hospital-Corpus Christi Fixed Rate Mortgage Loan
Debt Instrument [Line Items]
Repayments of mortgage loan	$ 2,500,000
Lease expiration date						Jun. 01, 2019
LIBOR \| Interest Rate Cap
Debt Instrument [Line Items]
Derivative instruments, LIBOR rate				1.50%	1.50%
Credit Agreement
Debt Instrument [Line Items]
Outstanding borrowing		$ 300,000,000				$ 300,000,000
Increase in borrowing capacity		$ 50,000,000
Unsecured revolving amended credit agreement terminated date		2022-03
Number of additional six month extension options \| Option		2
Proceeds from Lines of Credit		$ 50,000,000
Credit facility, Interest Rate Terms						one, two, three, or six month LIBOR plus an applicable margin ranging from 1.10% to 1.35% or at the Base Rate plus an applicable margin ranging from 0.10% to 0.35%.
Base rate description						the greater of: (a) the administrative agent’s prime rate; (b) the federal funds effective rate plus 1/2 of 1%, and; (c) one month LIBOR plus 1%.
Facility fee payable on commitment						0.20%
Credit Agreement \| LIBOR
Debt Instrument [Line Items]
Margin points added to the reference rate						1.20%
Credit Agreement \| Base Rate
Debt Instrument [Line Items]
Margin points added to the reference rate						0.20%
Credit Agreement \| Swingline/Short-Term Loans
Debt Instrument [Line Items]
Outstanding borrowing		30,000,000
Credit Agreement \| Letters of Credit
Debt Instrument [Line Items]
Outstanding borrowing		$ 40,000,000
Credit Agreement \| Minimum
Debt Instrument [Line Items]
Facility fee payable on commitment		0.15%
Credit Agreement \| Minimum \| LIBOR
Debt Instrument [Line Items]
Margin points added to the reference rate		1.10%
Margin points added to the base rate		1.00%
Credit Agreement \| Minimum \| Base Rate
Debt Instrument [Line Items]
Margin points added to the reference rate		0.10%
Credit Agreement \| Minimum \| Federal Funds Effective Rate
Debt Instrument [Line Items]
Margin points added to the base rate		0.50%
Credit Agreement \| Maximum
Debt Instrument [Line Items]
Facility fee payable on commitment		0.35%
Credit Agreement \| Maximum \| LIBOR
Debt Instrument [Line Items]
Margin points added to the reference rate		1.35%
Credit Agreement \| Maximum \| Base Rate
Debt Instrument [Line Items]
Margin points added to the reference rate		0.35%