Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018	Mar. 31, 2016
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (4,040)	$ (3,599)
Common Stock
Class of Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount	223,900
Interest rate swap
Class of Stock [Line Items]
Derivative, notional amount			$ 150,000
Derivative, fixed interest rate			1.29%
Derivative liability	2,800
Accumulated other comprehensive income (loss)	$ 2,200