Significant property acquisitions and sales in third quarter of 2014 (Details) (USD $)	Sep. 23, 2014	Sep. 19, 2014	Aug. 12, 2014	Jul. 25, 2014
Significant property acquisitions and sales in third quarter of 2014
Company sold acres of land known as Stanley Tools and Kelly Lots, to an independent third party				24.498
Sale price of land known as Stanley Tools and Kelly Lots				$ 4,300,000
Company paid existing mortgage of land				1,700,000
Company paid existing mortgagerelated to another parcel of land				200,000
Company sold a commercial building known as Sesame Square to an independent third party in square foot			20,715
Sale price of commercial building known as Sesame Square sold to an independent third party			2,600,000
Gain recorded on the sale of commercial building known as Sesame Square sold to an independent third party			1,800,000
Company paid existing mortagage of commercial building known as Sesame Square			800,000
Company acquired 100% ownership of Summer Breeze I-V, LLC, from an independent third party in units		216
Company exchanged the existing note receivable and all accrued interest in the amount for the ownership interest		3,500,000
Company sold complex known as Bridgewood Ranch, to an independent third party	106
Sale price of complex known as Bridgewood Ranch, sold to an independent third party	8,000,000
Paid off the existing mortagage on complex known as Bridgewood Ranch	4,500,000
New mortagage obtained by buyer on complex known as Bridgewood Ranch	$ 6,600,000