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Earnings per share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Reconciliation of components of basic and diluted EPS
A reconciliation of the components of basic and diluted EPS is presented below:
 
 
 
 
Successor
 
 
 
 
 
 
 
 
Period from
 
 
 
 
 
 
March 22, 2017
 
 
For the Year Ended December 31,
 
through
(in thousands, except share and per share data)
 
2019
 
2018
 
December 31, 2017
Numerator for basic and diluted earnings per share
 
 
 
 
 
 

Net (loss) income
 
$
(468,948
)
 
$
33,442

 
$
(118,902
)
Denominator for basic earnings per share
 
 
 
 
 
 
Weighted average common shares - Basic for Class A and Class B (1)
 
45,637,338

 
45,288,980

 
44,984,046

Effect of dilutive securities
 
 
 
 
 
 
Dilutive shares from equity compensation awards
 
—

 
441,191

 
—

Denominator for diluted earnings per share
 
 
 
 
 
 
Weighted average common shares - Diluted for Class A and Class B (1)
 
45,637,338

 
45,730,171

 
44,984,046

Earnings (loss) per share
 
 
 
 
 
 
Basic for Class A and Class B (1)
 
$
(10.28
)
 
$
0.74

 
$
(2.64
)
Diluted for Class A and Class B (1)
 
$
(10.28
)
 
$
0.73

 
$
(2.64
)
Securities excluded from earnings per share calculations
 
 
 
 
 
 
Unvested restricted stock awards or units at period end
 
3,187,231

 
125,323

 
1,833,136

Warrants (2)
 
—

 
—

 
140,023

____________________________________________________________
(1)
Effective December 19, 2018, Class B shares were converted to Class A shares.
(2)
The warrants to purchase shares of our Class A common stock are antidilutive for the period from March 22 to December 31, 2017, due to the exercise price exceeding the average price of our Class A shares and due to the net loss we incurred. These warrants expired on June 30, 2018. They were antidilutive during the first and second quarter of 2018 due to the exercise price exceeding the average price of our Class A shares and hence are omitted from diluted earnings per share for the year ended December 31, 2018.