Stock-Based Compensation - Equity Compensation Plans Narrative (Details) - shares shares in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2014 |
Dec. 31, 2016 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Reserved shares of common stock for possible future issuance | 3,700 | |
Employee stock options [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Options issued (in shares) | 46 | |
2004 Equity Compensation Plan [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Number of shares authorized for issuance | 4,100 |