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Deferred Compensation Awards (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation, Stock Options, Activity [Table Text Block]
A summary of stock option activity is as follows (in thousands, except option prices and years):
Number of OptionsWeighted Average Exercise PriceWeighted Average Remaining Contractual LifeAggregate Intrinsic Value
Options Outstanding at December 31, 2018498 $9.02 7.0$558.9 
Options Vested at December 31, 2018196 $8.43 4.4$335.4 
Granted250 $11.26 
Exercised(67)$7.67 
Forfeited(49)$8.06 
Cancelled— 
Options Outstanding at December 31, 2019633 $10.12 8.4$1,915.1 
Options Vested at December 31, 2019193 $9.40 9.6$725.4 
Granted— 
Exercised(5)$9.83 
Forfeited(2)$10.85 
Cancelled— 
Options Outstanding at December 31, 2020626 $10.12 7.39$2,683.6 
Options Vested at December 31, 2020348 $9.72 6.96$1,629.7 
Schedule of Total Awards Granted, Number of Units Outstanding and Amounts Paid to PSU Holders
The following table details total awards granted and the number of units outstanding as of December 31, 2020 along with the amounts paid to holders of phantom stock units ("PSUs") for the years ended December 31, 2020 and 2019 (in thousands, except unit amounts):
Amounts Paid For the Year Ended December 31,
Grant DateUnits GrantedUnits Outstanding20202019
Q1 201634,830 — — 29 
Q1 201722,712 — 24 80 
Q1 201830,907 2,576 113 109 
Q1 201932,190 13,413 118 86 
Q1 202022,481 16,861 58 — 
Total143,120 32,850 $313 $304 
Schedule of Recipients of SARs Awards, Grant Date, Units Granted, Exercise Price, Outstanding Shares and Amounts Paid
The following table details the recipients of the stock appreciation rights ("SARs") awards, the grant date, units granted, exercise price, outstanding units as of December 31, 2020 and amounts paid during the years ended December 31, 2020 and 2019 (in thousands, except unit and per unit amounts):
Amounts Paid For the Year Ended December 31,
RecipientsGrant DateUnits GrantedExercise PriceUnits Outstanding20202019
Members of Management (1)(3)
Q1 2015299,000 $4.26 80,500 208 481 
Key Executives (2)(4)
Q2 2015300,000 $5.13 — 623 705 
Members of Management (1)(5)
Q3 2017103,000 $9.40 54,750 37 125 
Members of Management (1)(6)
Q1 201833,000 $8.99 24,750 — 27 
Total 735,000  160,000 $868 $1,338 

(1)The SARs vest ratably over sixteen quarters from the grant date.
(2)The SARs vest over sixteen quarters, vesting 20% per year for the first three years, with the remainder, 40%, vesting in year four.
(3)The exercise price was determined to be the fair market value of one share of GWRC stock on the grant date of February 11, 2015.
(4)The exercise price was determined to be the fair market value of one share of GWRC stock on the grant date of May 8, 2015.
(5)The exercise price was determined to be the fair market value of one share of GWRI stock on the grant date of August 10, 2017.
(6)The exercise price was determined to be the fair market value of one share of GWRI stock on the grant date of March 12, 2018.
Schedule of Estimated Future Compensation Expense Based on GWRI’s closing share price on December 31, 2020 (the last trading date of the quarter), deferred compensation expense to be recognized over future periods is estimated for the years ending December 31 as follows (in thousands):
 PSUsSARs
2021273 153 
2022112 13 
Total385 166