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Condensed Consolidated Statements of Equity - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Retained Earnings
Total
Balance at the beginning at Dec. 31, 2017 $ 345 $ 1,628,355 $ (654,332) $ 974,368
Increase (Decrease) in Shareholders' Equity        
Net loss     (55,813) (55,813)
Other comprehensive income       0
Nonvested stock amortization   493   493
Balance at the end at Mar. 31, 2018 345 1,628,848 (710,145) 919,048
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)
Other comprehensive income       0
Nonvested stock amortization   452   452
Balance at the end at Mar. 31, 2019 $ 416 $ 1,740,615 $ (695,073) $ 1,045,958