Reportable Segments - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	$ 190,154	$ 153,095
Segment income before taxes	11,640	7,237
Amortization expense	8,263	7,968
INF
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	99,963	87,533
BTS
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	60,454	38,605
GEO
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	29,737	26,957
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income before taxes	34,166	26,983
Operating Segments | INF
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	99,963	87,533
Segment income before taxes	16,250	16,812
Operating Segments | BTS
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	60,454	38,605
Segment income before taxes	12,812	6,265
Operating Segments | GEO
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross revenues	29,737	26,957
Segment income before taxes	5,104	3,906
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income before taxes	$ (22,526)	$ (19,746)