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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of grants of share-based awards
The following grants of share-based awards were made in 2020 under the 2005 Incentive Plan: 
Date of GrantShares/
Units		Grant Date
Fair Value
Per Share/Unit		Vesting Period
January 2, 2020 (1)
369,938 $9.63 33% per year over three years
January 2, 2020 (2)
369,938 $13.15 100% on January 2, 2023
January 2, 2020 (3)
5,679 $9.63 100% on January 1, 2022
April 1, 2020 (3)
43,351 $1.64 100% on January 1, 2022
July 1, 2020 (3)
19,407 $3.47 100% on January 1, 2022
October 1, 2020 (3)
24,831 $2.41 100% on January 1, 2022
December 10, 2020 (4)
204,546 $4.40 100% on December 10, 2021
(1)Reflects grants of restricted stock to our executive officers and select management employees.
(2)Reflects grants of PSUs to our executive officers and select management employees. These awards when vested can only be settled in shares of our common stock.
(3)Reflects grants of restricted stock to certain independent members of our Board who have elected to take their quarterly fees in stock in lieu of cash.
(4)Reflects annual equity grants to each independent member of our Board.
Summary of information about restricted stock The following table summarizes information about our restricted stock: 
Year Ended December 31,
202020192018
Shares
Grant Date
Fair Value (1)
Shares
Grant Date
Fair Value (1)
Shares
Grant Date
Fair Value (1)
Awards outstanding at beginning of year1,173,045 $6.81 1,320,989 $7.40 1,579,218 $7.63 
Granted667,752 7.06 846,835 6.02 614,286 7.46 
Vested (2)
(631,498)7.52 (993,361)6.92 (823,310)7.88 
Forfeited(32,348)5.41 (1,418)8.82 (49,205)7.62 
Awards outstanding at end of year1,176,951 $6.61 1,173,045 $6.81 1,320,989 $7.40 
(1)Represents the weighted average grant date fair value, which is based on the quoted closing market price of our common stock on the trading day prior to the date of grant.
(2)Total fair value of restricted stock that vested during the years ended December 31, 2020, 2019 and 2018 was $5.4 million, $6.5 million and $6.4 million, respectively.
Summary of information about equity PSU awards
The following table summarizes information about our equity PSU awards: 
Year Ended December 31,
202020192018
Units
Grant Date
Fair Value (1)
Units
Grant Date
Fair Value (1)
Units
Grant Date
Fair Value (1)
Equity PSU awards outstanding at beginning of year1,565,044 $10.17 1,006,360 $11.76 613,665 $12.64 
Granted369,938 13.15 688,540 7.60 449,271 10.44 
Vested(589,335)12.64 — — — — 
Forfeited(48,521)7.60 (129,856)8.91 (56,576)10.83 
Equity PSU awards outstanding at end of year1,297,126 $9.99 1,565,044 $10.17 1,006,360 $11.76 
(1)Represents the weighted average grant date fair value, which is determined using a Monte Carlo simulation model.