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Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
SEC Schedule, 12-09, Allowance, Credit Loss [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 536 $ 475 $ 639
Charged to Costs & Expenses 169 194 (90)
Charged to Other Accounts [1] (2) 0 0 [2]
Deductions [3] 111 133 74
Balance at End of Period 592 536 475
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 36,480 35,391 39,171
Charged to Costs & Expenses [4] 0 3,284 641
Charged to Other Accounts [1] (170) 0 [2] (5,135) [2]
Deductions [5] 1,971 [3] 2,195 714
Balance at End of Period $ 34,339 $ 36,480 $ 35,391
[1] (4) Accounts written off.
[2] (3) Amount represents measurement-period adjustments related to the acquisition of LRM.
[3] (2) Includes foreign currency translation effect
[4] Valuation allowance recorded in the provision for income taxes for certain net operating losses and tax credits. The decrease in 2018 includes the impact of the divestiture of the AS&O Product Lines. The increase in 2017 includes the impact of the adoption of the Tax Reform Act, which increased the value of our state deferred tax assets to which a corresponding valuation allowance was recorded.
[5] Includes return to provision adjustments for prior years.