Short-term Investments - Estimated Fair Value Of Short-Term Investments By Contractual Maturity (Details) $ in Thousands |
Jun. 30, 2015
USD ($)
|
|---|---|
| Short-Term Investments And Fair Value Measurement [Abstract] | |
| Due within one year | $ 172,268 |
| Due after one year and through five years | 330,618 |
| Total short-term investments | $ 502,886 |
| X | ||||||||||
- Definition Short-Term Investments And Fair Value Measurement [Abstract] No definition available.
|
| X | ||||||||||
- Definition Fair value of available-for-sale debt securities maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
|
| X | ||||||||||
- Definition Fair value of available-for-sale debt securities maturing in the second through fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available.
|
| X | ||||||||||
- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|