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Segment Reporting (Details Textual) (USD $) | 3 Months Ended
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Mar. 31, 2011 acre Easement
Segment Reporting (Textual) [Abstract] |
Number of conservation easements sold | 5
Number of conservation easements acres sold | 62,000
Proceeds from sale of conservation easements | $ 15,750,000

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- Definition Conservation easement acres sold. + References No definition available. + Details
Name: | trc_ConservationEasementAcresSold
Namespace Prefix: | trc_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of conservation easement sold. + References No definition available. + Details
Name: | trc_NumberOfConservationEasementSold
Namespace Prefix: | trc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from sale of conservation easement. + References No definition available. + Details
Name: | trc_RevenueFromSaleOfConservationEasement
Namespace Prefix: | trc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | trc_SegmentReportingTextualAbstract
Namespace Prefix: | trc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration