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Consolidated Statements of Equity - USD ($)
$ in Thousands
Series A Preferred Stock
Preferred Stock
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive (Loss) Income
Retained Earnings
Total
Balance at Dec. 31, 2015   $ 73 $ 1,483,105 $ (21) $ (377,191) $ 1,105,966
Increase (Decrease) in Shareholders' Equity            
Net loss         (165,138) (165,138)
Other comprehensive loss       (5)   (5)
Issuance of 61,244 shares of nonvested stock   1 (1)      
Nonvested stock amortization     10,928     10,928
Balance at Jun. 30, 2016   74 1,494,032 $ (26) (542,329) 951,751
Balance at Dec. 31, 2016 $ 120,789 74 1,503,784   (594,948) 1,029,699
Increase (Decrease) in Shareholders' Equity            
Net loss         (30,112) (30,112)
Conversion of 27,061,856 shares of Series A Preferred Stock $ (120,789) 270 120,519      
Nonvested stock amortization     2,281     2,281
Balance at Jun. 30, 2017   $ 344 $ 1,626,584   $ (625,060) $ 1,001,868