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Stock Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
Stock-based compensation expense recorded for each type of stock-based compensation award activity for the three months ended March 31, 2020 and 2019 is as follows (in thousands):
Three Months Ended March 31,
20202019
Time-based restricted stock$660  $1,406  
Time-based restricted stock units3,968  2,311  
Performance-based restricted stock(1)
530  1,193  
Performance-based restricted stock units1,232  412  
Restructuring and other termination costs4,750  —  
Total stock-based compensation$11,140  $5,322  

(1)  Includes stock-based compensation expense related to historical PSUs that were converted to PSAs.
Summary of Restricted Stock, Restricted Stock Unit and Performance Unit Activity
The following table summarizes the Company’s stock-based compensation award activity for the three months ended March 31, 2020:
Time-Based Restricted Stock Awards (RSAs)Time-Based Restricted Stock Units
(RSUs)		Performance-Based Restricted Stock Awards
(PSAs)		Performance-Based Restricted Stock Units (PSUs)
Outstanding at January 1, 2020386,390  1,240,458  790,507  358,240  
Granted(1)
—  1,179,778  —  440,926  
Vested(158,737) (229,257) (236,944) —  
Forfeited—  (31,029) (101,556) —  
Outstanding at March 31, 2020227,653  2,159,950  452,007  799,166  
(1) Weighted average grant date fair value$—  $16.50  $—  $22.17