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RELATED PARTY TRANSACTIONS (Details) - USD ($)			1 Months Ended	12 Months Ended
	Oct. 31, 2016	Jan. 01, 2016	Oct. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction
Share based compensation charged to operations				$ 3,133,000	$ 2,983,000	$ 2,334,000
Deptford, New Jersey | Consolidated JV | MCB Real Estate LLC And Its Affiliates
Related Party Transaction
Purchase of Minority Interest Percentage	5.00%		5.00%
Gould Investors L.P.
Related Party Transaction
Number of common stock owned by the related party				1,785,976	1,785,976
Ownership percentage held by the related party				9.50%	9.80%
Number of shares purchased by the related party under the dividend reinvestment plan						81,211
Amount of insurance reimbursed				$ 790,000	$ 699,000	$ 520,000
Real estate insurance expense				757,000	645,000	339,000
Majestic
Related Party Transaction
Fees under compensation and services agreement				2,673,000	2,504,000	2,339,000
Property management costs allocated to real estate expenses annually				1,154,000	1,057,000	892,500
Additional payment for the entity's share of all direct office expenses				216,000	196,000	196,000
Chairman | General and administrative expense
Related Party Transaction
Fee paid				276,000	262,500	262,500
Vice Chairman | General and administrative expense
Related Party Transaction
Fee paid				110,000	105,000	105,000
Executive officers and others
Related Party Transaction
Share based compensation charged to operations				1,539,000	1,480,000	1,245,000
Joint venture partners
Related Party Transaction
Real estate management and acquisition costs				143,000	185,000	$ 198,000
Percentage of financing fees in Other Income						50.00%
Corporate joint venture
Related Party Transaction
Aggregate fees paid to other partners				175,000	176,000	$ 409,000
Decrease in equity earnings, joint venture transaction				$ 88,000	$ 88,000	205,000
Fee received						$ 131,000
Net lease tenants | Majestic
Related Party Transaction
Property management fee (as a percent)		1.50%
Operating lease tenants | Majestic
Related Party Transaction
Property management fee (as a percent)		2.00%

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