Loss Per Share 1 (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Weighted-average equity awards excluded from the calculation of diluted net income per share
Total	10,405	8,934	9,965	8,859
Employee stock options [Member]
Weighted-average equity awards excluded from the calculation of diluted net income per share
Total	2,494	2,868	2,522	2,888
RSUs and other equity [Member]
Weighted-average equity awards excluded from the calculation of diluted net income per share
Total	7,911	6,066	7,443	5,971