Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Cash paid during the year for: | |||
| Income taxes, net of refunds | $ 8,791 | $ 707 | $ 60 |
| Interest | 9 | 0 | 1 |
| Non-cash financing activity: | |||
| Conversion of preferred stock | 0 | 0 | 111 |
| Stock Issued | $ 1,741 | $ 666 | $ 0 |