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SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands | Jan. 17, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Subsequent Event [Line Items] |  |  |
Preferred shares, aggregate liquidation value |  | $ 775,000 | $ 775,000
Subsequent event | Series D 5.50% Preferred Shares |  |  |
Subsequent Event [Line Items] |  |  |
Preferred shares, number of shares redeemed (in shares) | 9,000,000 |  |
Preferred shares, aggregate liquidation value | $ 225,000 |  |

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- Definition Value of the difference between preference in liquidation and the par or stated values of the preferred shares. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |