DEBT (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Debt
Gross debt	$ 608,917,000us-gaap_DebtInstrumentCarryingAmount
Total Debt	608,714,000us-gaap_DebtAndCapitalLeaseObligations	395,105,000us-gaap_DebtAndCapitalLeaseObligations
Mortgages Payable
Debt
Gross debt	221,847,000	228,319,000
Premiums and discounts on assumed mortgages	1,961,000	2,786,000
Total Debt	223,808,000	231,105,000
Mortgage loan with a fixed interest of 7.66% per annum, due on December 1, 2015
Debt
Gross debt	26,783,000	28,262,000
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	12,737,000
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	32,070,000	34,755,000
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	34,583,000
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	40,526,000	41,170,000
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	30,292,000	30,812,000
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	387,070,000	164,000,000
Total Debt	384,906,000	164,000,000
Junior subordinated notes
Debt
Gross debt	27,070,000
Premiums and discounts on assumed mortgages	(2,164,000)
Junior subordinated notes \| LIBOR
Debt
Interest rate margin (as a percent)	3.25%
Unsecured credit facilities
Debt
Gross debt	$ 360,000,000	$ 164,000,000
Unsecured credit facilities \| Minimum
Debt
Weighted average rate (as a percent)	1.31%
Unsecured credit facilities \| Maximum
Debt
Weighted average rate (as a percent)	1.37%

Represents the period of amortization schedule of debt obligation.

No definition available.

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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 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

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- Definition

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

+ References

No definition available.

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- Definition

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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- Definition

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

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

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-Topic 210

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- Definition

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

+ References

No definition available.

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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

-Topic 835

-SubTopic 30

-Section 45

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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