Annual report pursuant to Section 13 and 15(d)

Earnings per Share (Tables)

Earnings per Share (Tables)
12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Components of Calculation of Basic and Diluted Earnings Per Share
The following table provides a reconciliation of the components used in the calculation of basic and diluted earnings per share for the periods presented:
  Year Ended December 31,
  2020 2019 2018
Net income (loss) – basic and diluted $ (310,557) $ 70,589  $ 224,785 
Weighted-average shares – basic 15,176  15,110  15,059 
Effect of dilutive securities 1
—  16  233 
Weighted-average shares – diluted 15,176  15,126  15,292 
1     Represents a combination of unvested RSUs and PRSUs that are dilutive with the exception of December 31, 2019 at which time all of our unvested PRSUs were determined to be at a zero percent vesting level due to the relative performance of our common stock. For the year ended December 31, 2020, approximately 0.1 million potentially dilutive securities had the effect of being anti-dilutive and were excluded from the calculation of diluted earnings per common share.