Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Compensation Expense) (Details)

v3.20.4
Stock-Based Compensation (Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Summary of employee stock-based compensation expense      
Stock-based compensation expense $ 56,292 $ 54,436 $ 40,245
Tax effect on stock-based compensation expense (14,354) (13,734) (10,093)
Net effect on income $ 41,938 $ 40,702 $ 30,152