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Leases (Tables)
 6 Months Ended
Jun. 30, 2020
Leases [Abstract]  
Components of Lease Expense
Lease expense is charged to selling, general and administrative expenses. Components of lease expense were as follows (in thousands):

  
Three Months Ended June 30,
    
Six Months Ended June 30,
  
   
2020
    
2019
    
2020
    
2019
  
Operating lease cost
  
$
11,083
    
$
10,465
    
$
21,515
    
$
20,693
  
Short-term lease cost
    
—
      
30
      
—
      
40
  
Variable lease cost
    
584
      
1,281
      
2,198
      
2,812
  
Total lease expense
  
$
11,667
    
$
11,776
    
$
23,713
    
$
23,545
  
Supplemental Cash Flow Information Related to Leases
Supplemental cash flow information related to leases is as follows (in thousands):

  
Six Months Ended June 30,
  
   
2020
    
2019
  
Cash paid for amounts included in the measurement of lease liabilities:
            
Operating cash flows from operating leases
  
$
14,028
    
$
20,085
  
Right-of-use assets obtained in exchange for lease obligations:
                
Operating leases
  
$
77,772
    
$
22,519