Reportable Segments - Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Segment revenues	$ 630,835	$ 475,839	$ 1,769,190	$ 1,364,176
Depreciation expense	11,300	10,500	34,200	31,100
Amortization of intangibles	9,696	16,104	28,745	48,306
Severance, restructuring, and acquisition integration costs	4,328	1,357	12,539	9,448
Segment assets	3,335,185		3,335,185		$ 3,139,734
Reportable Segment
Segment Reporting Information [Line Items]
Segment revenues	631,338	475,839	1,770,542	1,364,176
Segment EBITDA	99,738	64,641	271,207	173,560
Depreciation expense	11,270	10,455	34,197	31,069
Amortization of intangibles	9,696	16,104	28,745	48,306
Amortization of software development intangible assets	790	529	2,086	1,245
Severance, restructuring, and acquisition integration costs	4,328	1,357	12,539	9,448
Adjustments related to acquisitions and divestitures	2,464	0	4,997	125
Segment assets	1,160,678	1,005,252	1,160,678	1,005,252
Enterprise Solutions
Segment Reporting Information [Line Items]
Segment revenues	286,231	229,097	780,114	644,684
Severance, restructuring, and acquisition integration costs	3,381	1,337	7,756	6,310
Enterprise Solutions | Reportable Segment
Segment Reporting Information [Line Items]
Segment revenues	286,231	229,097	780,114	644,684
Segment EBITDA	40,156	26,250	103,531	73,193
Depreciation expense	5,270	5,005	15,985	15,208
Amortization of intangibles	4,427	5,408	13,202	16,266
Amortization of software development intangible assets	20	73	72	184
Severance, restructuring, and acquisition integration costs	3,381	1,337	7,756	6,310
Adjustments related to acquisitions and divestitures	(510)		(6,828)	125
Segment assets	552,416	519,142	552,416	519,142
Industrial Solutions
Segment Reporting Information [Line Items]
Segment revenues	344,604	246,742	989,076	719,492
Severance, restructuring, and acquisition integration costs	947	20	4,783	3,138
Industrial Solutions | Reportable Segment
Segment Reporting Information [Line Items]
Segment revenues	345,107	246,742	990,428	719,492
Segment EBITDA	59,582	38,391	167,676	100,367
Depreciation expense	6,000	5,450	18,212	15,861
Amortization of intangibles	5,269	10,696	15,543	32,040
Amortization of software development intangible assets	770	456	2,014	1,061
Severance, restructuring, and acquisition integration costs	947	20	4,783	3,138
Adjustments related to acquisitions and divestitures	2,974		11,825	0
Segment assets	$ 608,262	$ 486,110	$ 608,262	$ 486,110