Common Shares Reserved for Issuance (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Schedule of Reserved Shares of Common Stock for Issuance

We had reserved shares of common stock for issuance as follows (in thousands):

	As of March 31, 2016	As of December 31, 2015
Reserved under stock award plans	44,443	38,500
Convertible Senior Notes	15,141	15,141
ESPP	4,830	3,214
Total	64,414	56,855