Stock-Based Compensation (Schedule Of Share-Based Payment Arrangements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost charged against income, before income tax benefit	$ 387	$ 491	$ 1,378	$ 1,630
Stock-based compensation cost included in:
Cost of revenues	31	31	108	103
Operating expenses	356	460	1,270	1,527
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost charged against income, before income tax benefit	247	310	895	1,068
Restricted Stock And Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost charged against income, before income tax benefit	$ 140	$ 181	$ 483	$ 562