|
Stock-based Compensation Plans and Awards (Details Textual) (USD $)
|
3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2014
|
Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
|
Dec. 31, 2013
Employee Stock
|
Sep. 30, 2014
Employee Stock
|
Sep. 30, 2014
Employee Stock
|
Dec. 31, 2013
Employee Stock
Maximum
|
Sep. 30, 2014
Options to purchase common stock
|
Sep. 30, 2013
Options to purchase common stock
|
Sep. 30, 2014
Options to purchase common stock
|
Sep. 30, 2013
Options to purchase common stock
|
Sep. 30, 2014
Restricted Stock Units (RSUs)
|
Sep. 30, 2013
Restricted Stock Units (RSUs)
|
Sep. 30, 2014
Restricted Stock Units (RSUs)
|
Sep. 30, 2013
Restricted Stock Units (RSUs)
|
|
| Stock-based Compensation Plans and Awards | ||||||||||||||||
| Percentage of eligible compensation to purchase common stock through payroll deductions (as a percent) | 15.00% | |||||||||||||||
| Amount of eligible compensation per calendar year to purchase common stock | $ 25,000 | |||||||||||||||
| Shares of common stock reserved for issuance | 4,000,000 | |||||||||||||||
| Offering period | 6 months | |||||||||||||||
| Exercise price as a percentage of the fair market value of the common stock | 85.00% | |||||||||||||||
| Contributions from employees withheld | 1,900,000 | 4,400,000 | ||||||||||||||
| Stock-based compensation expense | $ 22,111,000 | $ 12,164,000 | $ 60,116,000 | $ 28,826,000 | $ 600,000 | $ 1,500,000 | $ 4,000,000 | $ 3,700,000 | $ 11,200,000 | $ 8,600,000 | $ 17,500,000 | $ 8,500,000 | $ 47,400,000 | $ 20,200,000 | ||
| Common stock issued (in shares) | 149,378 | 149,378 | ||||||||||||||
| Vesting term | 4 years | |||||||||||||||