Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans - Stock-based Compensation Expense (Details)

v3.20.4
Stock-Based Compensation Plans - Stock-based Compensation Expense (Details) - Restricted Stock - 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]      
Stock-based compensation included in costs and operating expenses $ 2,858 $ 3,264 $ 3,027
Income tax benefit recognized for stock-based compensation (713) (663) (755)
Stock-based compensation expense, net of income tax benefit $ 2,145 $ 2,601 $ 2,272