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Stock Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Stock Compensation  
Schedule of stock-based compensation costs
The following table sets forth stock-based compensation costs for the periods indicated:
SuccessorPredecessor
 Year Ended
Dec. 31, 2021		Period from Sept. 19, 2020 through
Dec. 31, 2020		Period from Jan. 1, 2020 through
Sept. 18, 2020		Year Ended
Dec. 31, 2019
In thousands
Stock-based compensation expense included in G&A$25,322 $8,212 $4,111 $12,470 
Stock-based compensation capitalized1,883 695 1,660 4,018 
Total cost of stock-based compensation arrangements$27,205 $8,907 $5,771 $16,488 
Income tax benefit recognized for stock-based compensation arrangements$6,331 $2,053 $1,028 $3,118 
Restricted Stock Units  
Stock Compensation  
Summary of the total vesting date fair value of equity awards The following is a summary of the total vesting date fair value of non-performance-based restricted stock units:
Year Ended
Dec. 31, 2021
In thousands
Fair value of restricted stock units vested
$31,073 
Schedule of nonvested restricted stock units activity
A summary of the status of our nonvested non-performance-based RSUs issued and the changes during the Successor period is presented below:
Number
of Awards		Weighted
Average
Grant-Date
Fair Value
Nonvested at December 31, 20201,219,867 $24.67 
Granted56,236 31.87 
Vested(405,311)24.80 
Forfeited(20,885)24.67 
Nonvested at December 31, 2021849,907 25.08 
Performance Share Units  
Stock Compensation  
Summary of the total vesting date fair value of equity awards
The following is a summary of the total vesting date fair value of PSU awards:
Year Ended
Dec. 31, 2021
In thousands
Vesting date fair value of PSU awards
$45,077 
Summary of performance-based equity awards valuation assumptions The range of assumptions used in the Monte Carlo simulation valuation approach is as follows:
Successor
Period from Sept. 19, 2020 through
Dec. 31, 2020
 
Weighted average fair value of PSU awards granted$24.19 
Risk-free interest rate0.21 %
Expected life0.23 years
Expected volatility110.0 %
Dividend yield— %
Schedule of nonvested performance stock unit awards activity
A summary of the PSU awards activity during the Successor period is as follows:
Number
of Awards		Weighted
Average
Grant-Date Fair Value
Nonvested at December 31, 20201,021,222 $24.19 
Granted— — 
Vested(1,021,222)24.19 
Forfeited— — 
Nonvested at December 31, 2021— — 
Restricted Stock  
Stock Compensation  
Summary of the total vesting date fair value of equity awards
The following is a summary of the total vesting date fair value of non-performance-based restricted stock:
Predecessor
Period from Jan. 1, 2020 through
Sept. 18, 2020		Year Ended
Dec. 31, 2019
In thousands
Fair value of restricted stock vested$707 $5,743 
Performance-Based Equity Awards  
Stock Compensation  
Summary of the total vesting date fair value of equity awards
The following is a summary of the total vesting date fair value of performance-based equity awards for the Predecessor:
Predecessor
Period from Jan. 1, 2020 through
Sept. 18, 2020		Year Ended
Dec. 31, 2019
In thousands
Vesting date fair value of Performance-Based Operational Awards$— $— 
Vesting date fair value of Performance-Based TSR Awards79 2,783 
Summary of performance-based equity awards valuation assumptions The range of assumptions used in the Monte Carlo simulation valuation approach for Performance-Based TSR Awards (presented at the target level) is as follows:
Predecessor
Period from Jan. 1, 2020 through
Sept. 18, 2020		Year Ended
Dec. 31, 2019
 
Weighted average fair value of Performance-Based TSR Awards granted$0.15 $1.95 
Risk-free interest rate0.27 %2.27 %
Expected life3.0 years3.0 years
Expected volatility89.6 %77.2 %
Dividend yield— %— %