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Prepaid Expenses and Other Assets (Tables)
9 Months Ended
Sep. 30, 2021
Text Block [Abstract]  
Summary of Prepaid Expenses and Other Assets
Prepaid expenses and other assets consist of the following (in thousands):
 
    
September 30,

2021
    
December 31,
2020
 
Prepaid expenses
   $ 9,195      $ 7,285  
Revenues in excess of billings
     10,094        8,879  
Income tax receivable
     —          7,823  
Other
     493        1,323  
    
 
 
    
 
 
 
Total prepaid expenses and other assets
   $ 19,782      $ 25,310