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Equity Incentive Compensation Plans and Other Long-term Incentive Programs (Tables)
3 Months Ended
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Non-Cash Stock-Based Compensation Cost Related to Equity Awards
The following table presents the long-term equity and cash incentive compensation related to awards for the periods indicated:

 Three Months Ended March 31,
 20202019
 (in thousands)
Nonvested common stock (1)
$1,150  $1,796  
Nonvested common stock units (1)
280  294  
Nonvested performance cash units (2)(3)
(974) 632  
Total$456  $2,722  

(1)Unrecognized compensation expense as of March 31, 2020 was $6.8 million, which related to grants of nonvested shares of common stock that are expected to be recognized over a weighted-average period of 1.9 years.
(2)The nonvested performance-based cash units are accounted for as liability awards with $0.2 million and $1.2 million in other noncurrent liabilities as of March 31, 2020 and December 31, 2019, respectively, in the Unaudited Consolidated Balance Sheets.
(3)Liability awards are fair valued at each reporting date. The expense for the period will increase or decrease based on updated fair values of these awards at each reporting date.
Nonvested Equity Shares  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Share Activity A summary of the Company's nonvested common stock awards for the three months ended March 31, 2020 and 2019 is presented below:
Three Months Ended March 31, 2020Three Months Ended March 31, 2019
Nonvested Common Stock AwardsSharesWeighted Average
Grant Date
Fair Value
SharesWeighted Average
Grant Date
Fair Value
Outstanding at January 1,2,968,497  $3.81  2,912,166  $5.27  
Granted2,028,617  1.14  1,835,700  2.64  
Vested(1,455,814) 4.25  (1,299,599) 5.19  
Forfeited or expired(9,488) 3.44  (16,487) 4.74  
Outstanding at March 31,3,531,812  2.10  3,431,780  3.90  
Nonvested Performance Cash Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Performance-based Units Activity A summary of the Company's nonvested performance-based cash unit awards for the three months ended March 31, 2020 and 2019 is presented below:
Three Months Ended March 31, 2020Three Months Ended March 31, 2019
Nonvested Performance-Based Cash Unit AwardsUnitsWeighted Average
Fair Value
UnitsWeighted Average
Fair Value
Outstanding at January 1,2,576,062  909,585  
Granted3,569,434  2,026,521  
Forfeited or expired(49,266) (67,472) 
Outstanding at March 31,6,096,230  $0.19  2,868,634  $2.21  
Director  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Share Activity
A summary of the Company's nonvested common stock unit awards for the three months ended March 31, 2020 and 2019 is presented below:

Three Months Ended March 31, 2020Three Months Ended March 31, 2019
Nonvested Common Stock Unit AwardsUnitsWeighted Average
Grant Date
Fair Value
UnitsWeighted Average
Grant Date
Fair Value
Outstanding at January 1,796,103  $3.27  311,237  $7.26  
Granted—  —  14,704  2.21  
Vested—  —  (14,704) 2.21  
Outstanding at March 31,796,103  3.27  311,237  7.26