Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.19.2
Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jul. 01, 2018
Jun. 30, 2019
Jul. 01, 2018
Jun. 28, 2019
Stock-based compensation $ 872,000 $ 821,000 $ 1,622,000 $ 1,557,000  
ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedFairValueOfCommonStockPerShare         $ 22.92
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value     235,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value     $ 6,000    
Share-based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 1,000   $ 1,000    
2012 Omnibus Equity Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 339,738   339,738    
2012 Omnibus Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]          
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 9,100,000   $ 9,100,000    
Minimum [Member] | Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years    
Maximum [Member] | Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years