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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, 2018 $ 416 $ 1,740,163 $ (687,272) $ 1,053,307
Increase (Decrease) in Shareholders' Equity        
Net loss     (7,801) (7,801)
Nonvested stock amortization   452   452
Balance at the end at Mar. 31, 2019 416 1,740,615 (695,073) 1,045,958
Increase (Decrease) in Shareholders' Equity        
Net loss     (34,476) (34,476)
Nonvested stock amortization   569   569
Balance at the end at Jun. 30, 2019 416 1,741,184 (729,549) 1,012,051
Increase (Decrease) in Shareholders' Equity        
Net loss     (14,591) (14,591)
Nonvested stock amortization   575   575
Balance at the end at Sep. 30, 2019 416 1,741,759 (744,140) 998,035
Balance at the beginning at Dec. 31, 2019 417 1,721,268 (743,257) 978,428
Increase (Decrease) in Shareholders' Equity        
Net loss     (120,350) (120,350)
Issuance of vested RSUs, net of forfeitures 1 (1)    
Cash dividends declared   (7,363)   (7,363)
Nonvested stock amortization   481   481
Balance at the end at Mar. 31, 2020 418 1,714,385 (863,607) 851,196
Increase (Decrease) in Shareholders' Equity        
Net loss     (18,204) (18,204)
Cash dividends declared   (842)   (842)
Nonvested stock amortization   476   476
Balance at the end at Jun. 30, 2020 418 1,714,019 (881,811) 832,626
Increase (Decrease) in Shareholders' Equity        
Net loss     (21,098) (21,098)
Cash dividends declared   (842)   (842)
Nonvested stock amortization   534   534
Balance at the end at Sep. 30, 2020 $ 418 $ 1,713,711 $ (902,909) $ 811,220