Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Schedule Of Allocation of Share-Based Compensation Costs) (Details)

v3.7.0.1
Stock-Based Compensation (Schedule Of Allocation of Share-Based Compensation Costs) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Cost Charged Against Income $ 413 $ 351
Stock options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Cost Charged Against Income 126 148
Restricted stock awards and restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Cost Charged Against Income 209 203
Performance stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Cost Charged Against Income 78 0
Cost of revenues    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Cost Charged Against Income 14 (7)
Operating expenses    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Cost Charged Against Income $ 399 $ 358