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EQUITY-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of restricted stock activity
The following table summarizes time-based restricted stock activity under our Equity Plan for 2021 and 2020:

 
 Number of SharesWeighted Average
Grant Date Fair Value
per Share		Aggregate
Current Value
  (in thousands)
Non-vested December 31, 2019448,467 $12.51  
Granted299,562 8.47  
Vested(172,170)13.31  
Forfeited(2,282)8.64 
Non-vested December 31, 2020573,577 10.18  
Granted536,980 10.27  
Vested(503,914)10.51  
Forfeited(1,173)9.98 
Non-vested December 31, 2021605,470 $9.98 $5,909 
The following table summarizes performance-based restricted stock activity under our Equity Plan for 2021 and 2020:

 
 Number of SharesWeighted Average
Grant Date Fair Value
per Share		Aggregate
Current Value
  (in thousands)
Non-vested December 31, 2019755,991 $14.31  
Granted376,609 9.38  
Vested— —  
Forfeited(210,361)17.13  
Non-vested December 31, 2020922,239 11.65  
Granted323,930 14.05  
Vested(182,480)13.73  
Forfeited(60,823)13.73  
Non-vested December 31, 20211,002,866 $11.92 $9,788 
Schedule of assumptions used estimate fair value of performance-based restricted stock awards granted
The fair value of performance-based restricted stock awards granted was estimated using a Monte Carlo simulation valuation model and the following assumptions:

 
 202120202019
Expected dividend yield— %8.16 %6.17 %
Expected stock price volatility63.7 %23.7 %23.2 %
Risk-free interest rate0.34 %0.53 %2.43 %
Monte Carlo iterations100,000 100,000 100,000 
Weighted average estimated fair value of performance-based restricted stock awards$14.05 $9.38 $12.81 
Schedule of equity-based compensation expense
Equity-based compensation expense included in Corporate General and Administrative expense in the Consolidated Statements of Operations for the years ended December 31, 2021, 2020, and 2019 was as follows (in thousands):

 
 202120202019
Time-based restricted stock$4,784 $2,470 $2,327 
Performance-based restricted stock5,314 3,559 3,396 
Director stock583 447 496 
 $10,681 $6,476 $6,219 
Schedule of unrecognized equity-based compensation expense for all non-vested awards
Unrecognized equity-based compensation expense for all non-vested awards pursuant to our Equity Plan was $8.0 million at December 31, 2021 as follows (in thousands):

 
 Total2022202320242025
Time-based restricted stock$3,823 $1,929 $1,468 $404 $22 
Performance-based restricted stock4,153 2,261 1,637 255 — 
 $7,976 $4,190 $3,105 $659 $22