Stock Based Compensation (Details) $ in Thousands |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2016
USD ($)
item
shares
|
Mar. 31, 2015
USD ($)
shares
|
|
| Stock-based compensation | ||
| Number of stock-based employee compensation plans | item | 4 | |
| Number of executive stock award plans | item | 3 | |
| Outstanding stock options (in shares) | 0 | 0 |
| Total unrecognized compensation cost related to non-vested share-based compensation arrangements | $ | $ 6,060 | |
| Weighted-average period over which unrecognized compensation cost is expected to be recognized | 3 years 6 months 5 days | |
| Stock options | ||
| Stock-based compensation | ||
| Total fair value of options vested and expensed | $ | $ 0 | $ 0 |
| Outstanding stock options (in shares) | 0 | 0 |
| Stock options exercised (in shares) | 0 | 0 |