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(Loss) Earnings per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Calculation of Weighted Average Common Shares Outstanding Used in Computation of Diluted (Loss) Earnings Per Share The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted (loss) earnings per share:
 
Net (Loss) Income
 
Weighted Average Shares
 
(Loss) Earnings Per Share
 
(In thousands, except per share amounts)
Three Months Ended March 31, 2018
 
 
 
 
 
Basic loss per share
$
(40,894
)
 
34,575

 
$
(1.18
)
Effect of dilutive securities
 
 
 
 
 
Restricted stock awards(1)
—

 
—

 
 
Performance share units(2)
—

 
—

 
 
Warrants(3)
—

 
—

 
 
Diluted loss per share
$
(40,894
)
 
34,575

 
$
(1.18
)
Three Months Ended March 31, 2017
 
 
 
 
 
Basic earnings per share
$
50,808

 
26,801

 
$
1.90

Effect of dilutive securities
 
 
 
 
 
Restricted stock awards(4)
—

 
—

 
 
Performance share units(4)
—

 
—

 
 
Warrants(3)
—

 
—

 
 
Diluted earnings per share
$
50,808

 
26,801

 
$
1.90

____________________
(1)
No incremental shares of potentially dilutive restricted stock awards were included for the three-month period ended March 31, 2018, as their effect was antidilutive under the treasury stock method. See Note 14 for discussion of the Company’s share and incentive-based compensation awards.
(2)
Performance share units covering an insignificant amount of shares for the three-month period ended March 31, 2018, were excluded from the computation of loss per share because their effect would have been antidilutive. See Note 14 for discussion of the Company’s share and incentive-based compensation awards.
(3)
No incremental shares of potentially dilutive warrants were included for the three-month periods ended March 31, 2018, or March 31, 2017, as their effect was antidilutive. See Note 14 for discussion of the Company’s share and incentive-based compensation awards.
(4)
No incremental shares of potentially dilutive restricted stock awards or performance share units were included for the three-month period ended March 31, 2017, as their effect was antidilutive under the treasury stock method. See Note 14 for discussion of the Company’s share and incentive-based compensation awards.