Stock-Based Plans - Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total Share-based Compensation | $ 3,029 | $ 2,303 | $ 8,292 | $ 6,057 |
Employee Stock Purchase Plan | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total Share-based Compensation | 291 | 118 | 561 | 358 |
Options and Restricted Stock Units | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total Share-based Compensation | $ 2,738 | $ 2,185 | $ 7,731 | $ 5,699 |