XML 63 R52.htm IDEA: XBRL DOCUMENT v3.6.0.2
Federal Income Tax Reporting - General and Income Tax Expense (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes      
Maximum ownership as a percentage of the voting power or value of the securities of each issuer other than REIT or "TRS" 10.00%    
Maximum ownership of securities in all TRS (as a percent) 25.00%    
Maximum ownership of securities in all TRS when considered together with other non-real estate assets (as a percent) 25.00%    
Period of statute of limitations applicable to the entity's income tax returns 3 years    
Net operating losses      
NOLs expiration period 20 years    
Gross amount of NOLs available to company $ 13,041,000 $ 13,041,000 $ 13,041,000
Income Tax Expense      
Revised Texas franchise tax 352,000 398,000 474,000
Other Taxes 66,000 35,000 24,000
Taxes on income 418,000 433,000 $ 498,000
Deferred income taxes 0    
Real estate assets net tax basis more (less) than book basis $ 197,669,000 $ 161,606,000