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SUPPLEMENTAL CASH FLOW INFORMATION
12 Months Ended
Dec. 31, 2021
SUPPLEMENTAL CASH FLOW INFORMATION
22. SUPPLEMENTAL CASH FLOW INFORMATION
Supplemental cash flow information was as follows:
 
Years Ended December 31,
  
2021
    
2020
    
2019
 
Interest paid
  
$
913
 
   $ 1,844      $ 4,341  
Income taxes net of refunds
  
$
124,984
 
   $ 70,889      $ 70,095  
Common stock issued for MIS
  
$
997
 
     —          —    
Common stock issued for ACME
  
$
2,551
 
     —          —    
Common stock issued for N&S
  
 
 
   $ (161    $ 4,032  
Common stock issued for PPI
  
 
 
     —        $ 58,344  
Common stock issued for DASCO
  
 
 
     —        $ 6,891