Annual report pursuant to Section 13 and 15(d)

NET (LOSS) INCOME PER SHARE - Calculation of Net Income Per Share (Details)

v3.20.4
NET (LOSS) INCOME PER SHARE - Calculation of Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Numerator (both basic and diluted)                      
Net (loss) income relevant to common stockholders $ (44,112) $ (29,184) $ (25,920) $ (7,804) $ 22,675 $ 34,397 $ 36,133 $ 69,805 $ (107,020) $ 163,010 $ 173,862
Denominator                      
Denominator for basic net (loss) income per share (in shares) 100,911 100,897 100,821 100,687 100,618 100,606 100,425 100,232 100,829 100,472 83,460
Denominator for diluted net (loss) income per share (in shares) 100,911 100,897 100,821 100,687 103,055 103,652 104,379 104,123 100,829 103,750 87,046
Basic net (loss) income per common share (in dollars per share) $ (0.44) $ (0.29) $ (0.26) $ (0.08) $ 0.23 $ 0.34 $ 0.36 $ 0.70 $ (1.06) $ 1.62 $ 2.08
Diluted net (loss) income per common share (in dollars per share) $ (0.44) $ (0.29) $ (0.26) $ (0.08) $ 0.22 $ 0.33 $ 0.35 $ 0.67 $ (1.06) $ 1.57 $ 2.00
Stock options                      
Denominator                      
Dilutive effect of stock options/units (in shares)                 0 2,929 3,129
Performance stock units                      
Denominator                      
Dilutive effect of stock options/units (in shares)                 0 169 277
Restricted stock units                      
Denominator                      
Dilutive effect of stock options/units (in shares)                 0 179 180