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CAPITAL STOCK - Summary of Dividend Distribution Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019
Dividends Payable [Line Items] |  |  |  |  |
Dividends and dividend equivalents declared on common stock and share-based awards | $ 359,736 | $ 365,488 | $ 1,158,629 | $ 1,062,685 |
Distributions declared per common share (in dollars per share) | $ 0.25 | $ 0.30 | $ 0.80 | $ 0.90 |
Distributions paid to common stockholders after period end | $ 359,491 | $ 102,811 | $ 359,491 | $ 102,811 |
Distributions paid per common share after period end (in dollars per share) | $ 0.25 | $ 0.08 | $ 0.25 | $ 0.08 |
Cumulative and undeclared dividends |  |  |  |  | $ 300
Series C |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 742 | $ 3,336 | $ 7,414 | $ 10,987 |
Preferred series dividends declared (in dollars per share) | $ 0.106 | $ 0.477 | $ 1.060 | $ 1.430 |
Series D |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 8,625 | $ 8,625 | $ 25,875 | $ 25,875 |
Preferred series dividends declared (in dollars per share) | $ 0.469 | $ 0.469 | $ 1.407 | $ 1.406 |
Series E |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 0 | $ 0 | $ 0 | $ 2,253 |
Preferred series dividends declared (in dollars per share) | $ 0 | $ 0 | $ 0 | $ 0.196 |
Series F |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 12,510 | $ 12,510 | $ 37,530 | $ 37,530 |
Preferred series dividends declared (in dollars per share) | $ 0.434 | $ 0.434 | $ 1.303 | $ 1.303 |
Series G |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 6,906 | $ 6,906 | $ 20,718 | $ 19,875 |
Preferred series dividends declared (in dollars per share) | $ 0.406 | $ 0.406 | $ 1.219 | $ 1.169 |
Series H |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 0 | $ 298 | $ 1,862 | $ 298 |
Preferred series dividends declared (in dollars per share) | $ 0 | $ 0.135 | $ 0.846 | $ 0.135 |
Series I |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Preferred dividends declared | $ 7,668 | $ 0 | $ 7,668 | $ 0 |
Preferred series dividends declared (in dollars per share) | $ 0.436 | $ 0 | $ 0.436 | $ 0 |
Cumulative and undeclared dividends | $ 300 |  | $ 300 |  |

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