XML 81 R70.htm IDEA: XBRL DOCUMENT v3.21.2
Equity Incentive Plans and Stock-Based Compensation (Details) - shares
 9 Months Ended
Sep. 30, 2021
Stock compensation plan  
Shares available for grant  
Shares available, at the beginning of the year 12,412,320
Stock options forfeited (in shares) 51,477
Nonvested equity stock and stock units granted (in shares) [1],[2] (3,719,258)
Nonvested equity stock and stock units forfeited (in shares) [2] 1,306,393
Shares available, at the end of the period 10,050,932
Conversion factor used to calculate the decrease in the number of shares available for grant resulting from the grant of restricted stock awards 1.5
Conversion factor used to calculate the increase in the number of shares available for grant resulting from the forfeiture of restricted stock awards 1.5
Potential additional performance stock units  
Shares available for grant  
Nonvested equity stock and stock units granted (in shares) [1] 400,000
[1] Amount includes approximately 0.4 million shares that have been reserved for potential future issuance related to certain performance unit awards granted in the first quarter of 2021 and discussed under the section titled “Nonvested Equity Stock and Stock Units” below
[2] For purposes of determining the number of shares available for grant under the 2015 Equity Incentive Plan (the “2015 Plan”) against the maximum number of shares authorized, each restricted stock granted reduces the number of shares available for grant by 1.5 shares and each restricted stock forfeited increases shares available for grant by 1.5 shares.