The Company And Summary Of Significant Accounting Policies (Reconciliation Of The Numerator And Denominators Of The Basic And Diluted Net Income Per Share Computations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
The Company And Summary Of Significant Accounting Policies [Abstract]
Net income	$ 3,519	$ 7,915	$ 9,640	$ 4,134	$ 36	$ 8,708	$ (1,983)	$ 4,203	$ 25,208	$ 10,964	$ 9,620
Weighted-average shares outstanding used to compute basic net income per share									51,277	53,587	56,637
Effect of dilutive securities									1,407	1,349	1,846
Weighted-average shares outstanding used to compute diluted net income per share									52,684	54,936	58,483
Basic net income per share	$ 0.07	$ 0.16	$ 0.19	$ 0.08	$ 0.00	$ 0.16	$ (0.04)	$ 0.08	$ 0.49	$ 0.20	$ 0.17
Diluted net income per share	$ 0.07	$ 0.15	$ 0.18	$ 0.08	$ 0.00	$ 0.16	$ (0.04)	$ 0.08	$ 0.48	$ 0.20	$ 0.16