Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION

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STOCK-BASED COMPENSATION
 9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION
The following is a summary of stock-based compensation expense we recorded during the respective periods:

Three Months Ended
September 30,		 Nine Months Ended
September 30,
2020 2019 2020 2019
(in thousands)
Selling, general and administrative expenses $ 47,590  $ 5,483  $ 82,802  $ 16,528 
Corporate expenses 9,105  6,515  24,163  20,396 
Total $ 56,695  $ 11,998  $ 106,965  $ 36,924 
The increase in stock-based compensation expense for the three and nine months ended September 30, 2020 as compared to the same periods of the prior year is primarily due to the issuance of restricted stock in the second quarter of 2020 in lieu of cash payments due for certain compensation owed to employees, as part of our cash savings initiative in connection with the global COVID-19 pandemic.