XML 15 R33.htm IDEA: XBRL DOCUMENT v3.3.0.814
Short-term Investments - Estimated Fair Value Of Short-Term Investments By Contractual Maturity (Details)
$ in Thousands
Sep. 30, 2015
USD ($)
Short-Term Investments And Fair Value Measurement [Abstract]  
Due within one year $ 155,330
Due after one year and through five years 338,875
Total short-term investments $ 494,205