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Significant real estate transactions (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Mar. 19, 2015
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Significant real estate transactions |  |
TCI sold acres of land | 17.872 fil_TciSoldAcresOfLand | 15.515 fil_TciSoldAcresOfLand
Sale price | $ 3.90 fil_SalePrice | $ 3.40 fil_SalePrice
Existing debt secured by the property | 1.90 fil_ExistingDebtSecuredByTheProperty | 5.10 fil_ExistingDebtSecuredByTheProperty
Recorded a gain on the sale | $ 1.60 fil_RecordedAGainOnTheSale | $ 1.30 fil_RecordedAGainOnTheSale
Sold to related parties acres of land | 110 fil_SoldToRelatedPartiesAcresOfLand |
Sold to related party apartment complex | 1 fil_SoldToRelatedPartyApartmentComplex |
Sold to related party commercial building | 1 fil_SoldToRelatedPartyCommercialBuilding |

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- Definition Existing debt secured by the property + References No definition available. + Details
Name: | fil_ExistingDebtSecuredByTheProperty
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of the gain recorded in connection with the transaction involving the sale of property + References No definition available. + Details
Name: | fil_RecordedAGainOnTheSale
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sale price of land parcels + References No definition available. + Details
Name: | fil_SalePrice
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition TCI has sold to a related party + References No definition available. + Details
Name: | fil_SoldToRelatedPartiesAcresOfLand
Namespace Prefix: | fil_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition TCI has sold to a related party one apartment complex + References No definition available. + Details
Name: | fil_SoldToRelatedPartyApartmentComplex
Namespace Prefix: | fil_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition TCI has sold to a related party one commercial building. + References No definition available. + Details
Name: | fil_SoldToRelatedPartyCommercialBuilding
Namespace Prefix: | fil_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition TCI sold acres of land + References No definition available. + Details
Name: | fil_TciSoldAcresOfLand
Namespace Prefix: | fil_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant