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SHAREHOLDERS' EQUITY AND PARTNERS' CAPITAL (Preferred Stock and Preferred Units) (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Shareholders Equity [Line Items] |  |  |
Preferred stock, shares authorized (in shares) | 15,000,000 |  |
Preferred stock, par value (in dollars per share) | $ 0.01 |  |
Issuance of shares of stock (in shares) | 348,809 | 335,417 | 278,093
Series E preferred stock |  |  |
Shareholders Equity [Line Items] |  |  |
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
Issuance of shares of stock (in shares) | 6,900,000 | 6,900,000 |
Preferred stock, dividend rate | 6.625% | 6.625% |
Preferred stock, liquidation preference per share (in dollars per share) | $ 250.00 |  |
Depositary shares, liquidation preference (in dollars per share) | 25 |  |
Dividends in arrears per share (in dollars per share) | 16.5625 |  |
Dividends in arrears per depositary share (in dollars per share) | 1.65625 |  |
Redemption price per share (in dollars per share) | 250 |  |
7.375% Series D Cumulative Redeemable Preferred Stock |  |  |
Shareholders Equity [Line Items] |  |  |
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
Preferred stock, dividend rate | 7.375% | 7.375% |
Preferred stock, liquidation preference per share (in dollars per share) | $ 250 |  |
Depositary shares, liquidation preference (in dollars per share) | 25 |  |
Dividends in arrears per share (in dollars per share) | 18.4375 |  |
Dividends in arrears per depositary share (in dollars per share) | $ 1.84375 |  |
Depositary shares outstanding (in shares) | 18,150,000 | 18,150,000 |

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- Definition Preferred Stock Liquidation Preference, Depositary Shares, Per Share + References No definition available. + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21484-112644 Reference 3: 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21564-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21488-112644 + Details
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