Acquisitions - Narrative (Details) - USD ($)							12 Months Ended
	Sep. 24, 2021	May 28, 2021	May 04, 2021	Aug. 01, 2019	Jul. 17, 2019	Mar. 14, 2019	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Business Acquisition [Line Items]
Goodwill							$ 580,761,000	$ 559,735,000	$ 287,527,000
Deferred revenue							20,944,000	18,654,000	4,971,000
Noncurrent deferred revenue							12,441,000	11,812,000	3,123,000
Transaction related expenses									11,828,000
Payments to acquire businesses, net of cash acquired							26,025,000	$ 0	584,192,000
Accounts receivable, gross									24,444,000
Accounts receivable, allowance for doubtful accounts									$ 1,380,000
ANLA, LLC
Business Acquisition [Line Items]
Purchase price		$ 38,641,000	$ 36,334,000
Contingent consideration (up to)			$ 2,000,000				$ 2,000,000
Purchase price, working capital adjustment		36,641,000
Goodwill		21,026,000
Payments to acquire business		26,309,000
Equity interests issued and issuable		10,025,000
Payments to acquire businesses, working capital adjustment	$ 26,616,000
Carryover basis in goodwill		13,616,000
Deferred revenue		883,000
Noncurrent deferred revenue		586,000
Transaction related expenses		$ 197,000
MRI
Business Acquisition [Line Items]
Goodwill						$ 2,228,000
Carryover basis in goodwill						1,698,000
Payments to acquire businesses, net of cash acquired						9,260,000
Cash acquired from acquisition						$ 201,000
CPD
Business Acquisition [Line Items]
Goodwill					$ 2,354,000
Carryover basis in goodwill					1,146,000
Payments to acquire businesses, net of cash acquired					12,507,000
Cash acquired from acquisition					$ 814,000
C4
Business Acquisition [Line Items]
Purchase price				$ 563,024,000
Goodwill				282,945,000
Equity interests issued and issuable				599,000
Carryover basis in goodwill				356,000
Cash acquired from acquisition				21,272,000
C4 | Old Credit Agreement
Business Acquisition [Line Items]
Proceeds from long-term debt				365,002,000
C4 | H&F
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired				$ 218,695,000