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Equity Incentive Plans and Stock-Based Compensation (Details) - shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Potential additional performance stock units      
Shares available for grant      
Nonvested equity stock and stock units granted (in shares) 200,000 600,000 400,000
Stock compensation plan      
Shares available for grant      
Shares available as of beginning of period 7,655,769 10,492,178 12,412,320
Number of additional shares authorized [1] 5,210,000    
Stock options forfeited     54,327
Nonvested equity stock and stock units granted (in shares) [3] (2,082,334) [2] (4,107,633) [4] (3,918,251) [5]
Nonvested equity stock and stock units forfeited (in shares) [3] 1,170,715 1,271,224 1,943,782
Shares available as of end of period 11,954,150 7,655,769 10,492,178
Stock compensation plan | Award date, period 1      
Shares available for grant      
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    
Stock compensation plan | Award date, period 2      
Shares available for grant      
Conversion factor used to calculate the decrease in the number of shares available for grant resulting from the grant of restricted stock awards 1.0    
Conversion factor used to calculate the increase in the number of shares available for grant resulting from the forfeiture of restricted stock awards 1.0    
[1] On April 27, 2023, the Company’s stockholders approved these additional shares to be reserved for issuance under the 2015 Plan.
[2] Amount includes approximately 0.2 million shares that have been reserved for potential future issuance related to certain performance unit awards granted in 2023 and discussed under the section titled “Nonvested Equity Stock and Stock Units” below.
[3] For purposes of determining the number of shares available for grant under the 2015 Plan against the maximum number of shares authorized, each restricted stock unit granted prior to April 27, 2023 reduces the number of shares available for grant by 1.5 shares and each restricted stock unit forfeited increases shares available for grant by 1.5 shares. Each restricted stock unit granted on or after April 27, 2023 reduces the number of shares available for grant by 1.0 shares and each restricted stock unit forfeited increases shares available for grant by 1.0 shares.
[4] Amount includes approximately 0.6 million shares that have been reserved for potential future issuance related to certain performance unit awards granted in 2022 and discussed under the section titled “Nonvested Equity Stock and Stock Units” below.
[5] Amount includes approximately 0.4 million shares that have been reserved for potential future issuance related to certain performance unit awards granted in 2021 and discussed under the section titled “Nonvested Equity Stock and Stock Units” below.