PROPERTY ACQUISITIONS - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2013 Lease Transactions	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	May 09, 2013 Transactions
Business Acquisition [Line Items]
Sale/leaseback transaction investment						$ 72,500,000
Sale/leaseback, initial term	15 years
Number of sale/leaseback transactions						2
Number of Triple-Net Unitary Leases	2
Number of Lease Renewal Options	3
Amount of Credit Line Borrowings Used to Finance Acquisition	57,500,000
Purchase price allocation, assets acquired		62,365,000		62,365,000
Purchase price allocated to direct financing and capital lease assets		6,267,000		6,267,000
Purchase price allocated to in-place lease and other intangible assets		3,868,000		3,868,000
Transaction cost related to acquisition		476,000		476,000
Future contractual minimum annual rent receivable receivable in 2013		3,762,000		3,762,000
Future contractual minimum annual rent receivable in 2014		5,830,000		5,830,000
Future contractual minimum annual rent receivable in 2015		5,830,000		5,830,000
Future contractual minimum annual rent receivable in 2016		5,908,000		5,908,000
Future contractual minimum annual rent receivable in 2017		6,026,000		6,026,000
Future contractual minimum annual rent receivable in 2018		6,147,000		6,147,000
Future contractual minimum annual rent receivable thereafter		64,195,000		64,195,000
Revenue from rental properties		25,425,000	21,591,000	72,360,000	72,078,000
Income form continuing operations		15,295,000	3,155,000	29,031,000	10,431,000
Mobil Gasoline Station [Member]
Business Acquisition [Line Items]
Acquisition of real estate assets	16
Exxon and Shell Gasoline Station [Member]
Business Acquisition [Line Items]
Acquisition of real estate assets	20
Internal Revenue Code Section 1031 [Member]
Business Acquisition [Line Items]
Amount of 1031 Exchange Proceeds Used To Finance Acquisition	11,500,000
White Oak, Hudson, Big Apple and Dogwood [Member]
Business Acquisition [Line Items]
Revenue from rental properties				2,501,000
Income form continuing operations				$ 1,577,000