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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