Reportable Segments - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 654,926	$ 626,807	$ 1,794,937	$ 1,960,841
Depreciation expense	(14,700)	(13,400)	(41,700)	(38,500)
Amortization of intangibles	(13,738)	(9,526)	(34,487)	(30,262)
Operating income	75,349	95,429	197,281	273,563
Gain on sale of assets	0	12,056	0	12,056
Interest expense, net	(10,855)	(8,580)	(27,454)	(25,593)
Non-operating pension benefit	286	328	747	1,462
Consolidated income before taxes	64,780	87,177	170,574	249,432
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	654,926	626,807	1,794,937	1,960,841
Segment EBITDA	112,266	114,937	295,992	348,516
Depreciation expense	(14,655)	(13,442)	(41,697)	(38,478)
Amortization of intangibles	(13,738)	(9,526)	(34,487)	(30,262)
Severance, restructuring, and acquisition integration costs	(5,263)	(6,075)	(13,468)	(11,846)
Amortization of software development intangible assets	(2,678)	(1,963)	(7,855)	(5,235)
Adjustments related to acquisitions and divestitures	561	495	1,157	1,042
Operating income	75,349	95,429	197,281	273,563
Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (22)	$ (63)	$ (47)	$ (146)