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CAPITAL STOCK - Summary of Dividend Distribution Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Dividends Payable [Line Items]
Dividends and dividend equivalents declared on common stock and share-based awards	$ 308,346	$ 357,819
Distributions declared per common share (in dollars per share)	$ 0.22	$ 0.25
Distributions paid to common stockholders after period end	$ 307,671	$ 357,606
Distributions paid per common share after period end (in dollars per share)	$ 0.22	$ 0.25
Series D
Dividends Payable [Line Items]
Preferred dividends declared	$ 0	$ 8,625
Preferred series dividends declared (in dollars per share)	$ 0	$ 0.469
Series F
Dividends Payable [Line Items]
Preferred dividends declared	$ 12,510	$ 12,510
Preferred series dividends declared (in dollars per share)	$ 0.434	$ 0.434
Series G
Dividends Payable [Line Items]
Preferred dividends declared	$ 6,906	$ 6,906
Preferred series dividends declared (in dollars per share)	$ 0.406	$ 0.406
Series I
Dividends Payable [Line Items]
Preferred dividends declared	$ 7,467	$ 7,468
Preferred series dividends declared (in dollars per share)	$ 0.422	$ 0.422

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Aggregate dividends paid during the period for each share of common stock outstanding.

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