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CONSOLIDATED STATEMENTS OF OPERATIONS PARENTHETICALS (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Property operating expenses from affiliates and related parties | $ 61 | $ 8 | $ 15
General and administrative from affilites and related parties | 334 | 260 | 278
Interest income from affiliates and related parties | $ 5,183 | $ 4,447 | $ 4,292

X
- Definition The amount of general and administrative from related parties during the period. + References No definition available. + Details
Name: | fil_GeneralAndAdministrativeFromAffilitesAndRelatedParties
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business). + References No definition available. + Details
Name: | fil_InterestIncomeFromAffiliatesAndRelatedParties1
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of property operating expenses from related parties during the period. + References No definition available. + Details
Name: | fil_PropertyOperatingExpensesFromAffiliatesAndRelatedParties
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration