Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Components of Other Comprehensive Income (Loss) (Details)

v3.19.3
Shareholders' Equity - Components of Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income $ (1,189) $ 442 $ (281) $ (700)
Total Other Comprehensive Income (Loss) (1,189) 442 (281) (700)
Foreign Currency Translation Adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (1,336) 226 (722) (1,346)
Total Other Comprehensive Income (Loss) (1,336) 226 (722) (1,346)
Amortization of Prior Service Cost        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Reclassification to General and Administrative Expense 101 101 302 303
Amortization of Net Actuarial Losses        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Reclassification to General and Administrative Expense 85 172 256 515
Retirement Liability Adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income 147 216 441 646
Tax Benefit (39) (57) (117) (172)
Total Other Comprehensive Income (Loss) $ 147 $ 216 $ 441 $ 646