Weighted average amortization period of finite-lived intangible liabilities acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

INCOME PROPERTIES (Details)					1 Months Ended		3 Months Ended
INCOME PROPERTIES (Details)	Mar. 31, 2017 USD ($) ft² state property	Mar. 01, 2017 USD ($) ft² a building property	Jan. 27, 2017 USD ($) ft² a	Feb. 18, 2016 USD ($)	Sep. 30, 2016 property	Apr. 30, 2016 property	Mar. 31, 2017 USD ($) ft² state property	Mar. 31, 2016 USD ($) a property
Acquisitions
Area of real estate property \| ft²	1,800,000						1,800,000
Dallas, Texas
Acquisitions
Purchase price				$ 4,100,000
Commercial
Acquisitions
Purchase price							$ 19,100,000
Aggregate acquisition cost							19,400,000
Land acquired	$ 13,300,000						13,300,000
Buildings and improvements acquired	4,800,000						4,800,000
Intangible assets acquired	2,100,000						2,100,000
Intangible liabilities acquired	$ 800,000						$ 800,000
Weighted average amortization period of intangible assets							3 years 10 months 24 days
Weighted average amortization period of intangible liabilities							3 years 10 months 24 days
Acres \| a								3.1
Number of real estate properties \| state	33						33
Commercial \| Sarasota, Florida
Acquisitions
Occupancy Percentage			100.00%
Purchase price			$ 4,100,000
Area of real estate property \| ft²			18,120
Acres \| a			1.20
Remaining lease term			5 years
Commercial \| Fort Worth, Texas
Acquisitions
Occupancy Percentage		96.00%
Purchase price		$ 15,000,000
Area of real estate property \| ft²		136,000
Acres \| a		10.3
Number of land parcels \| property		3
Commercial \| Fort Worth, Texas \| Weighted average
Acquisitions
Remaining lease term		4 years 1 month 6 days
Single-tenant
Acquisitions
Number of acquisitions \| property							1
Number of real estate properties \| property	22						22
Single-tenant \| Fort Worth, Texas
Acquisitions
Number of real estate properties \| building		4
Multi-tenant
Acquisitions
Number of acquisitions \| property							1	1
Purchase price								$ 2,500,000
Number of real estate properties \| property	11						11
Multi-tenant \| Fort Worth, Texas
Acquisitions
Number of real estate properties \| building		1
2017 Disposals \| Sold
Acquisitions
Number of properties in the disposal group \| property							0
2016 Disposals \| Sold
Acquisitions
Number of properties in the disposal group \| property								0
Impairment write-down								$ 210,000
2016 Disposals \| Sold \| Single-tenant
Acquisitions
Number of properties in the disposal group \| property					14	3
2016 Disposals \| Under contract to be sold \| Single-tenant
Acquisitions
Number of properties in the disposal group \| property	17