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Stock-Based Employee Compensation Plans - Compensation expense expected to be recognized (Details)
$ in Thousands
Jun. 30, 2020
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award  
Remainder of 2020 $ 442
2021 630
2022 397
2023 151
2024 and beyond 77
Estimated Stock Based Compensation Expense Total 1,697
Stock options  
Share-based Compensation Arrangement by Share-based Payment Award  
Remainder of 2020 89
2021 125
2022 110
2023 101
2024 and beyond 67
Estimated Stock Based Compensation Expense Total 492
Restricted stock  
Share-based Compensation Arrangement by Share-based Payment Award  
Remainder of 2020 230
2021 261
2022 123
2023 50
2024 and beyond 10
Estimated Stock Based Compensation Expense Total 674
Stock Units  
Share-based Compensation Arrangement by Share-based Payment Award  
Remainder of 2020 123
2021 244
2022 164
2023 0
2024 and beyond 0
Estimated Stock Based Compensation Expense Total $ 531