Certain Financial Statement Information (Details 15) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Schedule of Reconciliation of Shares Used to Calculate Basic and Diluted Net (Loss) Income Per Share
Net loss (USD)	$ 10,857	$ (23,390)
Shares used in net loss per share computation:
Weighted average common shares outstanding, basic	69,360	62,409
Net effect of dilutive common share equivalents	874	0
Weighted average common shares outstanding, diluted	70,234	62,409
Basic and diluted net loss per share (USD per share)	$ 0.16	$ (0.37)
Diluted net income (loss) per share (in dollars per share)	$ 0.15	$ (0.37)