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Net Income (Loss) per Share - Schedule of Earnings per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Numerator:        
Net income (loss) $ 38,427 $ (14,434) $ 12,391 $ (2,050)
Denominator:        
Weighted-average shares used to compute net income (loss) per share-basic (in shares) 51,416 51,190 51,315 51,161
Dilutive restrictive stock awards (in shares) 169 0 109 0
Weighted-average shares used to compute net income (loss) per share-basic (in shares) 51,585 51,190 51,424 51,161
Net income (loss) per share-basic (in dollars per share) $ 0.75 $ (0.28) $ 0.24 $ (0.04)
Net income (loss) per share-diluted (in dollars per share) $ 0.74 $ (0.28) $ 0.24 $ (0.04)