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Stock-Based Compensation (Tables)
3 Months Ended
Apr. 03, 2021
Stock-Based Compensation [Abstract]  
Summary of Recognized Stock-based Compensation Expense
The following table summarizes stock-based compensation expense recognized:

   
Fiscal quarters ended
 
   
April 3, 2021
   
April 4, 2020
 
             
Restricted stock units
 
$
3,911
   
$
2,783
 
Phantom stock units
   
209
     
215
 
Total
 
$
4,120
   
$
2,998
 
Summary of Unrecognized Compensation Cost and Weighted Average Remaining Amortization Periods
The following table summarizes unrecognized compensation cost and the weighted average remaining amortization periods at April 3, 2021 (amortization periods in years):

 
Unrecognized
Compensation
Cost
   
Weighted
Average
Remaining
Amortization
Periods
 
             
Restricted stock units
 
$
5,885
     
1.1
 
Phantom stock units
   
-
     
n/a
 
Total
 
$
5,885
         
RSU Activity
RSU activity under the 2007 Program as of April 3, 2021 and changes during the three fiscal months then ended are presented below (number of RSUs in thousands):

 
Number of
RSUs
   
Weighted
Average
Grant-date
Fair Value per
Unit
 
Outstanding:
           
January 1, 2021
   
793
   
$
18.90
 
Granted
   
319
     
22.07
 
Vested*
   
(235
)
   
18.79
 
Cancelled or forfeited
   
-
     
-
 
Outstanding at April 3, 2021
   
877
   
$
20.08
 
                 
Expected to vest at April 3, 2021
   
877
         

* The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements.
RSUs with Performance-Based Vesting Criteria
The number of performance-based RSUs that are scheduled to vest increases ratably based on the achievement of defined performance criteria between the established target and maximum levels.  RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands):

Vesting Date
 
Expected
to Vest
   
Not Expected
to Vest
   
Total
 
January 1, 2022
   
174
     
-
     
174
 
January 1, 2023
   
152
     
-
     
152
 
January 1, 2024
   
165
     
-
     
165
 
Phantom Stock Unit Activity Under the Phantom Stock Plan
Phantom stock unit activity under the phantom stock plan as of April 3, 2021 and changes during the three fiscal months then ended are presented below (number of phantom stock units in thousands):

 
Number of
units
   
Grant-date
Fair Value per
Unit
 
Outstanding:
           
January 1, 2021
   
198
       
Granted
   
10
   
$
20.89
 
Dividend equivalents issued
   
1
         
Outstanding at April 3, 2021
   
209