Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Schedule of Stock-Based Compensation Expense) (Details)

v3.20.4
Stock-Based Compensation (Schedule of Stock-Based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense $ 17,778 $ 17,832 $ 14,291
Income tax benefits (4,015) (4,009) (3,218)
Total stock-based compensation expense, net of tax 13,763 13,823 11,073
Cost of Sales      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense 303 278 250
Selling, General and Administrative Expense [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense $ 17,475 $ 17,554 $ 14,041