Period of time for interest only payment.

No definition available.

Name:	tphs_DebtInstrumentInterestOnlyPaymentPeriod
Namespace Prefix:	tphs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The period of time for which no prepayment of debt allowed.

+ References

No definition available.

+ Details

Name:	tphs_DebtInstrumentLockInPeriod
Namespace Prefix:	tphs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

It represents the rate of percentage of prepayment premium.

+ References

No definition available.

+ Details

Name:	tphs_DebtInstrumentPrepaymentPremium
Namespace Prefix:	tphs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The rate at which premium should pay up on prepayment of debt.

+ References

No definition available.

+ Details

Name:	tphs_DebtInstrumentPrepaymentRate
Namespace Prefix:	tphs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Unconsolidated VIE's

+ References

No definition available.

+ Details

Name:	tphs_NumberOfUnconsolidatedVieS
Namespace Prefix:	tphs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents value of purchased price of the property

+ References

No definition available.

+ Details

Name:	tphs_PurchasePriceOfProperty
Namespace Prefix:	tphs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Threshold maximum common stock price per share, to trigger prepayment of debt instrument, an option available to lender.

+ References

No definition available.

+ Details

Name:	tphs_ThresholdMaximumCommonStockPricePerShareToTriggerPrepaymentOfDebtInstrument
Namespace Prefix:	tphs_
Data Type:	num:perShareItemType
Balance Type:	na
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

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=114775744&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

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

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=114775744&loc=d3e28551-108399

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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599

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 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_VariableRateAxis=tphs_ThirtyDayLondonInterBankOfferRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=tphs_New7YearLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tphs_BerkleyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tphs_TwoHundredAndFiftyNorth10thStreetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Investments in Unconsolidated Joint Ventures - Additional information (Details) $ / shares in Units, $ in Thousands			1 Months Ended	9 Months Ended
	Feb. 28, 2020 USD ($)	Jan. 15, 2020 USD ($) $ / shares	Dec. 31, 2016 USD ($)	Sep. 30, 2020 USD ($) entity	Dec. 31, 2019 entity
Schedule of Equity Method Investments [Line Items]
Unconsolidated VIE's \| entity				1	1
Equity Method Investments				$ 5,700
Thirty Day London Inter Bank Offer Rate [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Basis Spread on Variable Rate				216.00%
Debt Instrument Interest				5 years
Debt Instrument Period				2 years
Debt Instrument Prepayment				1.00%
Berkley Loan [Member]
Schedule of Equity Method Investments [Line Items]
Purchase Price Of Property			$ 68,885
Equity Method Investment, Ownership Percentage				50.00%
Debt Instrument, Face Amount			$ 42,500
Debt Instrument, Term			10 years
Debt Instrument, Interest Rate, Effective Percentage					3.92%
New 7-year Loan [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument Period	5 years
Debt Instrument Prepayment Premium	$ 33,000
Debt Instrument, Term	7 years
Debt Instrument, Interest Rate, Effective Percentage	2.717%
Partner Loan [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Term		4 years
Debt Instrument, Interest Rate, Effective Percentage		7.00%
Threshold Maximum Common Stock Price Per Share, To Trigger Prepayment Of Debt Instrument \| $ / shares		$ 6.50
The Berkley [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument Prepayment Premium	$ 6,000
Equity Method Investment, Ownership Percentage				50.00%	50.00%
250 North 10th
Schedule of Equity Method Investments [Line Items]
Purchase Price Of Property		$ 137,750
Equity Method Investment, Ownership Percentage				10.00%
Debt Instrument, Face Amount		$ 82,750
Debt Instrument, Term		15 years
Debt Instrument, Interest Rate, Effective Percentage		3.39%
250 North 10th \| Partner Loan [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments		$ 5,900