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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Series C Preferred Stock | Series B Preferred Stock | Preferred Stock Series C Preferred Stock | Preferred Stock Series B Preferred Stock | Common Stock | Additional Paid-in Capital | Additional Paid-in Capital Series C Preferred Stock | Accumulated Deficit | Accumulated Deficit Series C Preferred Stock | Accumulated Deficit Series B Preferred Stock | Accumulated Other Comprehensive Income | Revision of Prior Period, Accounting Standards Update, Adjustment | Revision of Prior Period, Accounting Standards Update, Adjustment Accumulated Deficit
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Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference (in dollars per share) |  |  |  |  |  | $ 25.00 |  |  |  |  |  |  |  |  |
Balance (in shares) at Dec. 31, 2017 |  |  |  |  |  | 8,000,000 | 397,831,000 |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2017 |  | $ 3,261,636 |  |  |  | $ 80 | $ 3,978 | $ 3,227,304 |  | $ (578,950) |  |  | $ 609,224 | $ 295 | $ 295
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss)/income |  | 301,801 |  |  |  |  |  |  |  | 301,801 |  |  |  |  |
Issuance of stock, net of expenses (in shares) |  |  |  |  |  |  | 52,420,000 |  |  |  |  |  |  |  |
Issuance of stock, net of expenses |  | 392,145 |  |  |  |  | $ 520 | 391,625 |  |  |  |  |  |  |
Repurchase of shares of common stock (in shares) | [1] |  |  |  |  |  | (464,000) |  |  |  |  |  |  |  |
Repurchase of shares of common stock | [1] | (3,392) |  |  |  |  |  | (3,392) |  |  |  |  |  |  |
Equity based compensation expense |  | 7,999 |  |  |  |  |  | 7,999 |  |  |  |  |  |  |
Change in accrued dividends attributable to stock-based awards |  | (261) |  |  |  |  |  | (261) |  |  |  |  |  |  |
Dividends declared on common stock |  | (339,244) |  |  |  |  |  |  |  | (339,244) |  |  |  |  |
Dividends declared on preferred stock |  | (15,000) |  |  |  |  |  |  |  | (15,000) |  |  |  |  |
Dividends attributable to dividend equivalents |  | (942) |  |  |  |  |  |  |  | (942) |  |  |  |  |
Change in unrealized losses on MBS, net |  | (203,481) |  |  |  |  |  |  |  |  |  |  | (203,481) |  |
Derivative hedging instrument fair value changes and amortization, net |  | 14,545 |  |  |  |  |  |  |  |  |  |  | 14,545 |  |
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Dec. 31, 2018 |  |  |  |  |  | 8,000,000 | 449,787,000 |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2018 |  | $ 3,416,101 |  |  |  | $ 80 | $ 4,498 | 3,623,275 |  | (632,040) |  |  | 420,288 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to tax withholding for share-based compensation |  |  |  |  |  |  | $ 3,400 |  |  |  |  |  |  |  |
Shares paid for tax withholding for share based compensation (in shares) |  |  |  |  |  |  | 464,429 |  |  |  |  |  |  |  |
Preferred stock, dividend rate |  |  |  |  |  | 7.50% |  |  |  |  |  |  |  |  |
Preferred stock, cash dividends declared (in dollars per share) |  |  |  | $ 1.875 |  |  |  |  |  |  |  |  |  |  |
Common stock, cash dividends declared (in dollars per share) |  | $ 0.80 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference (in dollars per share) |  |  |  |  |  | $ 25.00 |  |  |  |  |  |  |  |  |
Net (loss)/income |  | $ 378,117 |  |  |  |  |  |  |  | 378,117 |  |  |  |  |
Issuance of stock, net of expenses (in shares) |  |  |  |  |  |  | 3,145,000 |  |  |  |  |  |  |  |
Issuance of stock, net of expenses |  | 12,325 |  |  |  |  | $ 26 | 12,299 |  |  |  |  |  |  |
Repurchase of shares of common stock (in shares) | [1] |  |  |  |  |  | (563,000) |  |  |  |  |  |  |  |
Repurchase of shares of common stock | [1] | (4,118) |  |  |  |  |  | (4,118) |  |  |  |  |  |  |
Equity based compensation expense |  | 9,230 |  |  |  |  |  | 9,230 |  |  |  |  |  |  |
Change in accrued dividends attributable to stock-based awards |  | (345) |  |  |  |  |  | (345) |  |  |  |  |  |  |
Dividends declared on common stock |  | (361,033) |  |  |  |  |  |  |  | (361,033) |  |  |  |  |
Dividends declared on preferred stock |  | (15,000) |  |  |  |  |  |  |  | (15,000) |  |  |  |  |
Dividends attributable to dividend equivalents |  | (1,084) |  |  |  |  |  |  |  | (1,084) |  |  |  |  |
Change in unrealized losses on MBS, net |  | (24,445) |  |  |  |  |  |  |  |  |  |  | (24,445) |  |
Derivative hedging instrument fair value changes and amortization, net |  | (25,796) |  |  |  |  |  |  |  |  |  |  | (25,796) |  |
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Dec. 31, 2019 |  |  |  |  | 0 | 8,000,000 | 452,369,000 |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2019 |  | $ 3,383,952 |  |  | $ 0 | $ 80 | $ 4,524 | 3,640,341 |  | (631,040) |  |  | 370,047 | $ (8,326) | $ (8,326)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible List] |  | us-gaap:AccountingStandardsUpdate201613Member |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to tax withholding for share-based compensation |  |  |  |  |  |  | $ 4,100 |  |  |  |  |  |  |  |
Shares paid for tax withholding for share based compensation (in shares) |  |  |  |  |  |  | 562,815 |  |  |  |  |  |  |  |
Preferred stock, dividend rate |  |  |  | 7.50% | 6.50% | 7.50% |  |  |  |  |  |  |  |  |
Preferred stock, cash dividends declared (in dollars per share) |  |  |  | $ 1.875 |  |  |  |  |  |  |  |  |  |  |
Common stock, cash dividends declared (in dollars per share) |  | $ 0.80 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference (in dollars per share) |  |  |  |  | $ 25.00 | $ 25.00 |  |  |  |  |  |  |  |  |
Net (loss)/income |  | $ (679,390) |  |  |  |  |  |  |  | (679,390) |  |  |  |  |
Issuance of stock, net of expenses (in shares) |  |  |  |  | 11,000,000 |  | 13,792,000 |  |  |  |  |  |  |  |
Issuance of stock, net of expenses |  | 7,453 | $ 266,052 |  | $ 110 |  | $ 138 | 7,315 | $ 265,942 |  |  |  |  |  |
Repurchase of shares of common stock (in shares) | [1] |  |  |  |  |  | (14,447,000) |  |  |  |  |  |  |  |
Repurchase of shares of common stock | [1] | (53,577) |  |  |  |  | $ (145) | (53,432) |  |  |  |  |  |  |
Equity based compensation expense |  | 6,715 |  |  |  |  |  | 6,715 |  |  |  |  |  |  |
Change in accrued dividends attributable to stock-based awards |  | 856 |  |  |  |  |  | 856 |  |  |  |  |  |  |
Dividends declared on common stock |  | (56,546) |  |  |  |  |  |  |  | (56,546) |  |  |  |  |
Dividends declared on preferred stock |  | (29,796) | $ (14,796) | $ (15,000) |  |  |  |  |  |  | $ (14,796) | $ (15,000) |  |  |
Dividends attributable to dividend equivalents |  | (229) |  |  |  |  |  |  |  | (229) |  |  |  |  |
Change in unrealized losses on MBS, net |  | (313,115) |  |  |  |  |  |  |  |  |  |  | (313,115) |  |
Derivative hedging instrument fair value changes and amortization, net |  | 22,675 |  |  |  |  |  |  |  |  |  |  | 22,675 |  |
Warrants issued and repurchased, net |  | (19,608) |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk |  | (2,314) |  |  |  |  |  |  |  |  |  |  | (2,314) |  |
Balance (in shares) at Dec. 31, 2020 |  |  |  |  | 11,000,000 | 8,000,000 | 451,714,000 |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2020 |  | $ 2,524,802 |  |  | $ 110 | $ 80 | $ 4,517 | $ 3,848,129 |  | $ (1,405,327) |  |  | $ 77,293 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to tax withholding for share-based compensation |  |  |  |  |  |  | $ 2,700 |  |  |  |  |  |  |  |
Shares paid for tax withholding for share based compensation (in shares) |  |  |  |  |  |  | 360,534 |  |  |  |  |  |  |  |
Preferred stock, dividend rate |  |  | 6.50% | 7.50% | 6.50% | 7.50% |  |  |  |  |  |  |  |  |
Preferred stock, cash dividends declared (in dollars per share) |  |  | $ 1.345 | $ 1.875 |  |  |  |  |  |  |  |  |  |  |
Common stock, cash dividends declared (in dollars per share) |  | $ 0.125 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference (in dollars per share) |  |  |  |  | $ 25.00 | $ 25.00 |  |  |  |  |  |  |  |  |
[1] | For the year ended December 31, 2020, includes approximately $2.7 million (360,534 shares) surrendered for tax purposes related to equity-based compensation awards. For the year ended December 31, 2019, includes approximately $4.1 million (562,815 shares) surrendered for tax purposes related to equity-based compensation awards. For the year ended December 31, 2018, includes approximately $3.4 million (464,429 shares) surrendered for tax purposes related to equity-based compensation awards.

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