XML 84 R66.htm IDEA: XBRL DOCUMENT v3.22.2
Retirement Benefits Plan (Tables)
12 Months Ended
Dec. 31, 2021
Text Block [Abstract]  
Summary of defined contribution plans
                         
Years ended December 31,
  
2021
     2020      2019  
Defined contribution plans
  
$
4,567
 
   $ 4,514      $ 5,485  
401(k) matched savings plan
  
 
3,025
 
     3,912        4,556  
    
 
 
    
 
 
    
 
 
 
Net pension expense
  
$
7,592
 
   $ 8,426      $ 10,041