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Employee Benefits - Summary of Stock Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock compensation expense $ 3,535 $ 2,635 $ 10,228 $ 8,050
Cost of sales        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock compensation expense 161 60 287 221
Selling        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock compensation expense 56 45 145 154
Administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock compensation expense $ 3,318 $ 2,530 $ 9,796 $ 7,675