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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

X

- 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

X

- 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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X

- 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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- Details

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X

- Details

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Namespace Prefix:
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