Shareholders' Equity And Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Shareholders' Equity and Stock-based Compensation [Abstract]
Number of Shares, Outstanding	1,324
Number of Shares, Options granted	128
Number of Shares, Options exercised	(1)
Number of Shares, Outstanding	1,451
Number of Shares, Exercisable	1,101
Number of Shares, Available for future grant at December 31, 2015	490
Number of Shares, Available for future grant at March 31, 2016	363
Weighted-average Exercise Price, Outstanding | $ / shares	$ 6.36
Weighted-average Exercise Price, Options granted | $ / shares	7.58
Weighted-average Exercise Price, Options exercised | $ / shares	3.16
Weighted-average Exercise Price, Outstanding | $ / shares	6.47
Weighted-average Exercise Price, Exercisable | $ / shares	$ 6.35
Aggregate Intrinsic Value, Outstanding | $	$ 1,440
Aggregate Intrinsic Value, Exercisable | $	$ 1,323