Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted stock awards - USD ($) |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vested in period, fair value | $ 2,200,000 | $ 2,700,000 | |
Unrecognized compensation expense | $ 0 | ||
Executive Officer | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Award vesting period (years) | 3 years |