Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY

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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated (Deficit) Surplus
Balance (in shares) at Dec. 31, 2017   83,040    
Balance at Dec. 31, 2017 $ 413,252 $ 83 $ 607,466 $ (194,297)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock-based compensation cost 758   758  
Issuance of equity awards, net (in shares)   372    
Net income 36,708     36,708
Balance (in shares) at Mar. 31, 2018   83,412    
Balance at Mar. 31, 2018 450,718 $ 83 608,224 (157,589)
Balance (in shares) at Dec. 31, 2018   100,190    
Balance at Dec. 31, 2018 797,355 $ 100 817,690 (20,435)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock-based compensation cost 1,829   1,829  
Issuance of equity awards, net (in shares)   104    
Issuance of equity awards, net 552 $ 0 552  
Net income 69,805     69,805
Balance (in shares) at Mar. 31, 2019   100,294    
Balance at Mar. 31, 2019 $ 869,541 $ 100 $ 820,071 $ 49,370