RECENT ACCOUNTING PRONOUNCEMENTS Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Other Assets	$ 89,554	$ 91,858
Assets	1,659,282	1,661,904
Secured Debt	345,444	350,285
Unsecured Debt	528,312	528,210
Unsecured bank credit facilities	165,849	149,414
Liabilities	1,102,999	1,102,703
Liabilities and Equity	$ 1,659,282	1,661,904
Accounting Standards Update 2015-03 SImplifying the Presentation of Debt Issuance Costs [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Other Assets		91,858
Assets		1,661,904
Secured Debt		350,285
Unsecured Debt		528,210
Unsecured bank credit facilities		149,414
Liabilities		1,102,703
Liabilities and Equity		1,661,904
Accounting Standards Update 2015-03 SImplifying the Presentation of Debt Issuance Costs [Member] \| Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Other Assets		96,186
Assets		1,666,232
Secured Debt		351,401
Unsecured Debt		530,000
Unsecured bank credit facilities		150,836
Liabilities		1,107,031
Liabilities and Equity		$ 1,666,232

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.18)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 12
-Article 7

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Including the current and noncurrent portions, the carrying value as of the balance sheet date of notes payable to banks, excluding mortgage notes, initially due beyond one year or beyond the operating cycle if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Number 210
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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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