DEBT (Details) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Debt
Total Debt	$ 662,948,000	$ 608,714,000
Mortgages Payable
Debt
Gross debt	144,791,000	221,847,000
Premiums and discounts on assumed mortgages	1,178,000	1,961,000
Total Debt	$ 145,969,000	223,808,000
Mortgage loan with a fixed interest of 7.66% per annum, due on December 1, 2015
Debt
Gross debt		$ 26,783,000
Fixed interest rate (as a percent)	7.66%	7.66%
Period of amortization schedule	20 years	20 years
Amount of balance due on maturity	$ 25,324,000	$ 25,324,000
Mortgage loan with a fixed interest of 4.50% per annum, due on January 5, 2027
Debt
Gross debt	$ 46,000,000	$ 46,000,000
Fixed interest rate (as a percent)	4.50%	4.50%
Period of amortization schedule	10 years	10 years
Amount of balance due on maturity	$ 42,008,000	$ 42,008,000
Mortgage loan with a fixed interest of 5.56% per annum, due on July 1, 2015
Debt
Gross debt		$ 12,442,000
Fixed interest rate (as a percent)	5.56%	5.56%
Period of amortization schedule	10 years	10 years
Amount of balance due on maturity	$ 12,288,000	$ 12,288,000
Mortgage loan with a fixed interest of 6.65% per annum, due on July 15, 2018
Debt
Gross debt	$ 29,201,000	$ 32,070,000
Fixed interest rate (as a percent)	6.65%	6.65%
Period of amortization schedule	25 years	25 years
Amount of balance due on maturity	$ 21,136,000	$ 21,136,000
Mortgage loan with a fixed interest of 5.06% per annum, due on September 1, 2015
Debt
Gross debt		$ 33,734,000
Fixed interest rate (as a percent)	5.06%	5.06%
Amount of balance due on maturity	$ 33,068,000	$ 33,068,000
Mortgage loan with a fixed interest of 5.39% per annum, due on March 1, 2021
Debt
Gross debt	$ 39,846,000	$ 40,526,000
Fixed interest rate (as a percent)	5.39%	5.39%
Amount of balance due on maturity	$ 35,695,000	$ 35,695,000
Mortgage loan with a fixed interest of 5.18% per annum, due on June 5, 2021
Debt
Gross debt	$ 29,744,000	$ 30,292,000
Fixed interest rate (as a percent)	5.18%	5.18%
Amount of balance due on maturity	$ 26,232,000	$ 26,232,000
Other debt
Debt
Gross debt	519,070,000	387,070,000
Premiums and discounts on assumed mortgages	(2,091,000)	(2,164,000)
Total Debt	516,979,000	384,906,000
Junior subordinated notes
Debt
Gross debt	$ 27,070,000	27,070,000
Junior subordinated notes \| LIBOR
Debt
Interest rate margin (as a percent)	3.25%
Unsecured term loan facility
Debt
Gross debt	$ 385,000,000
Unsecured credit facilities
Debt
Gross debt	$ 107,000,000	$ 360,000,000

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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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- Definition

The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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