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Treasury Stock (Details) - USD ($) shares in Thousands, $ in Thousands | 1 Months Ended | 9 Months Ended
--- | --- | ---
Nov. 06, 2019 | Sep. 30, 2019 | Sep. 30, 2018
Treasury Stock |  |  |
Common stock acquired, cost |  | $ 17,293 | $ 4,135
Common stock repurchase authorization |  |  |
Treasury Stock |  |  |
Authorization amount for repurchase of common stock |  | $ 175,000 |
Common stock purchased for treasury, shares | 78 | 175 |
Common stock acquired, cost | $ 7,692 | $ 17,293 |
Remaining authorized repurchase amount |  | $ 70,809 |

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