Share Repurchases (Details) - USD ($) $ in Thousands |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
May 31, 2015 |
|
| Equity, Class of Treasury Stock [Line Items] | |||
| Common stock authorized for repurchase | $ 5,900 | ||
| Number of common stock repurchased (in shares) | 119,007 | 427,646 | |
| Value of common stock repurchased | $ 1,821 | $ 3,242 | |
| Maximum | |||
| Equity, Class of Treasury Stock [Line Items] | |||
| Common stock authorized for repurchase | $ 20,000 | ||