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EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								9 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2019
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners						20.00%
Business Combination, Consideration Transferred					$ 195,000
Common Stock, Dividends, Per Share, Cash Paid		$ 0.89	$ 0.865	$ 0.86	$ 0.825	$ 0.795	$ 0.77
Dividends, Preferred Stock, Cash		$ 300	$ 300	$ 300
Preferred Stock, Dividends, Declared		$ 275	$ 275	$ 275	$ 275	$ 275	$ 275
Stock Issued During Period, Shares, New Issues							21,900,000
Proceeds from Issuance or Sale of Equity							$ 1,200,000
Aggregate Amount Of Common Shares Available For Issuance And Sale Under Equity Distribution Agreement								$ 1,000,000
Issued Under Equity Agreement [Member]
Common Stock Sold Under Equity Distribution Agreement									0
Series E Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage									5.50%
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.915
Dividends Payable, Date of Record	Nov. 04, 2019
Dividends Payable, Date to be Paid	Nov. 14, 2019
Preferred Stock, Dividends, Declared	$ 300

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