The Company And Summary Of Significant Accounting Policies (Reconciliation Of The Numerator And Denominators Of The Basic And Diluted Net Income (Loss) Per Share Computations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
The Company And Summary Of Significant Accounting Policies [Abstract]
Net income	$ 12,544	$ 11,979	$ (4,022)	$ 8,962	$ 3,519	$ 7,915	$ 9,640	$ 4,134	$ 29,463	$ 25,208	$ 10,964
Weighted-average shares outstanding used to compute basic net income per share									49,797	51,277	53,587
Effect of dilutive securities									2,376	1,407	1,349
Weighted-average shares outstanding used to compute diluted net income per share									52,173	52,684	54,936
Basic net income per share	$ 0.25	$ 0.24	$ (0.08)	$ 0.18	$ 0.07	$ 0.16	$ 0.19	$ 0.08	$ 0.59	$ 0.49	$ 0.20
Diluted net income per share	$ 0.24	$ 0.23	$ (0.08)	$ 0.17	$ 0.07	$ 0.15	$ 0.18	$ 0.08	$ 0.56	$ 0.48	$ 0.20