Share Repurchases (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Feb. 28, 2018 |
|
| Equity, Class of Treasury Stock [Line Items] | |||
| Common stock authorized for repurchase | $ 12,600 | ||
| Number of common stock repurchased (in shares) | 300,000 | 119,007 | |
| Value of common stock repurchased | $ 7,448 | $ 1,821 | |
| Maximum | |||
| Equity, Class of Treasury Stock [Line Items] | |||
| Common stock authorized for repurchase | $ 20,000 | ||