Segment Reporting - Reconciliation of Total Segment Profit to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Segment Reporting [Abstract]
Total Segment Profit	$ 82,169	$ 99,484	$ 176,290	$ 196,179
Amortization	16,591	12,014	35,248	23,683
Unallocated General And Administrative Expenses	10,669	12,537	38,642	19,090
Operating income	54,909	74,933	102,400	153,406
Interest expense	11,315	8,296	22,199	16,455
Interest income	(1,623)	(1,371)	(2,848)	(2,304)
Other (income) expense, net	(122,015)	3,877	(122,263)	4,016
Income before income tax expense	$ 167,232	$ 64,131	$ 205,312	$ 135,239