Acres of land related to land liens.

No definition available.

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- Definition

Additional reimbursement funds.

+ References

No definition available.

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Balance Type:	debit
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- Details

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- Definition

Letter of credit period.

+ References

No definition available.

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- Definition

Letter of credit renewal period.

+ References

No definition available.

+ Details

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- Definition

Long-term Water Assets (Volume)

+ References

No definition available.

+ Details

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- Definition

Number of Community Facility Districts

+ References

No definition available.

+ Details

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- Definition

Percentage of interest rate held.

+ References

No definition available.

+ Details

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- Definition

Amount of minimum lease payments for capital leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

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Period Type:	instant

- Definition

Amount of minimum lease payments for capital leases net of executory costs, which include amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- 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://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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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=6879938&loc=d3e572229-122910

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Balance Type:	credit
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- Definition

Number of defendants named in a legal action.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Taxes, excluding payroll, income and excise taxes, if not included elsewhere, that could include production, real and personal property, and other selling and distribution-related taxes.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

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- Details

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- Details

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- Details

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- Details

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Commitments and Contingencies (Details) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended
Commitments and Contingencies (Details) (USD $)	Mar. 31, 2015 facility aft	Dec. 31, 2014 aft	Nov. 10, 2009 defendant	Feb. 28, 2015 participant	Sep. 30, 2013
Commitment and Contingencies Disclosure [Line Items]
Future minimum payments due	$ 7,900,000
Long-term water assets (volume)	49,018trc_LongTermWaterAssetsVolume	49,461trc_LongTermWaterAssetsVolume
Estimated future payments	800,000
Number of community facility districts	2trc_NumberofCommunityFacilityDistricts
Additional bond debt authorized to be sold in future					4,750,000us-gaap_DebtInstrumentFaceAmount
Letter of credit period	2 years
Letter of credit renewal period	2 years
Special taxes paid		933,000us-gaap_TaxesOther
Percentage of interest rate held	2.00%trc_PercentageOfInterestRateHeld
Standby letter of credit
Commitment and Contingencies Disclosure [Line Items]
Letters of credit outstanding amount	5,426,000
Annual cost related to letter of credit	83,000
West CFD
Commitment and Contingencies Disclosure [Line Items]
Acres of land related to land liens	420
Bond debt sold by TRPFFA	28,620,000
Additional bond debt authorized to be sold in future	0
Additional reimbursement funds	0
East CFD
Commitment and Contingencies Disclosure [Line Items]
Acres of land related to land liens	1,931
Letters of credit outstanding amount	39,750,000
Additional bond debt authorized to be sold in future	80,250,000
Additional reimbursement funds		$ 4,971,000
Transferable water
Commitment and Contingencies Disclosure [Line Items]
Long-term water assets (volume)					22,179
Transferable water \| DMB
Commitment and Contingencies Disclosure [Line Items]
Long-term water assets (volume)	6,693
Affiliated Entity
Commitment and Contingencies Disclosure [Line Items]
Number of defendants			2
Settled Litigation \| Antelope Valley Groundwater Cases
Commitment and Contingencies Disclosure [Line Items]
Number of parties settled, more than				140