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Consolidated Statements of Equity - USD ($) $ in Thousands | Common Stock | Additional Paid-in Capital | Accumulated Deficit | Total
--- | --- | --- | --- | ---
Balance at the beginning at Dec. 31, 2017 | $ 345 | $ 1,628,355 | $ (654,332) | $ 974,368
Increase (Decrease) in Shareholders' Equity |  |  |  |
Net loss |  |  | (32,940) | (32,940)
Issuance of 7,015,000 shares of common stock | 70 | 109,578 |  | 109,648
Issuance of shares of vested RSUs | 1 | (1) |  |
Nonvested stock amortization |  | 2,231 |  | 2,231
Balance at the end at Dec. 31, 2018 | 416 | 1,740,163 | (687,272) | 1,053,307
Increase (Decrease) in Shareholders' Equity |  |  |  |
Net loss |  |  | (55,985) | (55,985)
Issuance of shares of vested RSUs | 1 | (1) |  |
Cash dividends declared |  | (20,951) |  | (20,951)
Nonvested stock amortization |  | 2,057 |  | 2,057
Balance at the end at Dec. 31, 2019 | 417 | 1,721,268 | (743,257) | 978,428
Increase (Decrease) in Shareholders' Equity |  |  |  |
Net loss |  |  | (225,573) | (225,573)
Issuance of 47,341 shares of vested RSUs, net of forfeitures of 1,490 shares | 1 | (1) |  |
Cash dividends declared |  | (9,887) |  | (9,887)
Nonvested stock amortization |  | 2,026 |  | 2,026
Balance at the end at Dec. 31, 2020 | $ 418 | $ 1,713,406 | $ (968,830) | $ 744,994

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