Shareholders' Equity And Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares
Shareholders' Equity And Stock-Based Compensation [Abstract]
Number of Shares, Outstanding	1,385
Number of Shares, Options forfeited or cancelled	(5)
Number of Shares, Options granted	197
Number of Shares, Options exercised	(46)
Number of Shares, Outstanding	1,531
Number of Shares, Exercisable	1,141
Number of Shares, Available for future grant at beginning of period	404
Number of Shares, Available for future grant at end of period	230
Weighted-average Exercise Price, Outstanding | $ / shares	$ 6.54
Weighted-average Exercise Price, Options forfeited or cancelled | $ / shares	7.40
Weighted-average Exercise Price, Options granted | $ / shares	7.40
Weighted-average Exercise Price, Options exercised | $ / shares	5.61
Weighted-average Exercise Price, Outstanding | $ / shares	6.68
Weighted-average Exercise Price, Exercisable | $ / shares	$ 6.50
Aggregate Intrinsic Value, Outstanding | $	$ 3,213
Aggregate Intrinsic Value, Exercisable | $	$ 2,807