XML 52 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-Based Compensation Plans (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 28, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated Share-based Compensation Expense   $ 344,000 $ 395,000 $ 1,149,000 $ 1,174,000
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share Price $ 35.18        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value, Amount Per Share $ 35.18