Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	$ 404,809	$ 371,334
United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	382,079	352,109
Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	22,730	19,225
Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	231,691	224,276
Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	32,745	28,023
Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	7,669	8,995
Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	132,704	110,040
Utility
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	241,336	224,576
Utility | United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	228,007	213,819
Utility | Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	13,329	10,757
Utility | Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	149,419	142,589
Utility | Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0
Utility | Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	4,932	3,973
Utility | Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	86,985	78,014
Residential and commercial
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	162,850	146,208
Residential and commercial | United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	153,449	137,740
Residential and commercial | Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	9,401	8,468
Residential and commercial | Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	82,752	81,824
Residential and commercial | Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	32,745	28,023
Residential and commercial | Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	2,737	5,022
Residential and commercial | Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	44,616	31,339
All other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	623	550
All other | United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	623	550
All other | Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0
All other | Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	(480)	(137)
All other | Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0
All other | Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0
All other | Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	$ 1,103	$ 687