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Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Earnings Per Share [Abstract]        
Net income (loss) $ 13,290 $ (27,400) $ 23,150 $ (21,473)
Basic-weighted average shares outstanding (in shares) 29,125 28,542 29,052 28,506
Effect of dilutive potential securities (in shares) 3,339 0 2,912 0
Diluted- weighted average shares outstanding (in shares) 32,464 28,542 31,964 28,506
Basic (in dollars per share) $ 0.46 $ (0.96) $ 0.80 $ (0.75)
Diluted (in dollars per share) $ 0.41 $ (0.96) $ 0.72 $ (0.75)
Antidilutive securities excluded from computation of earnings per share (in shares) 700   500  
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities 1,400   1,200  
Incremental Common Shares Attributable to Dilutive Effect of Warrants 600   400