Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Reclassification) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax (expense) or benefit	$ (12,375)	$ (11,197)	$ (17,878)	$ (16,033)
Net of tax	46,078	39,907	62,910	61,014
Interest rate swap | Reclassifications from accumulated other comprehensive income (loss) | Derivative Financial Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest (expense) or income	315	305	1,220	661
Tax (expense) or benefit	(60)	(75)	(273)	(162)
Net of tax	$ 255	$ 230	$ 947	$ 499