Description of Business and Summary of Significant Accounting Policies (Anti-dilutive) (Details) - shares shares in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share | ||
| Total (in shares) | 2,179 | 166 |
| Options | Common Stock | ||
| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share | ||
| Total (in shares) | 1,065 | |
| Restricted stock units | ||
| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share | ||
| Total (in shares) | 1,114 | 166 |