Stock-Based Compensation (Schedule Of Share-Based Payment Arrangements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost charged against income, before income tax benefit	$ 439	$ 516	$ 991	$ 1,138
Stock-based compensation cost included in:
Cost of revenues	35	35	77	72
Operating expenses	404	481	914	1,066
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost charged against income, before income tax benefit	272	335	648	758
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	$ 167	$ 181	$ 343	$ 380