Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	$ 481,654	$ 445,206	$ 886,463	$ 816,540
United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	454,144	418,813	836,224	770,922
Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	27,510	26,393	50,239	45,618
Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	280,955	249,971	512,647	474,248
Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	65,691	59,826	98,435	87,849
Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	7,233	5,360	14,902	14,354
Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	127,775	130,049	260,479	240,089
Utility
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	253,860	228,324	495,196	452,900
Utility | United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	240,039	215,156	468,047	428,975
Utility | Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	13,821	13,168	27,149	23,925
Utility | Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	161,037	135,987	310,456	278,577
Utility | Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Utility | Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	4,278	2,175	9,210	6,148
Utility | Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	88,545	90,162	175,530	168,175
Residential and commercial
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	226,516	215,981	389,366	362,189
Residential and commercial | United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	212,827	202,756	366,276	340,496
Residential and commercial | Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	13,689	13,225	23,090	21,693
Residential and commercial | Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	119,664	113,989	202,417	195,813
Residential and commercial | Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	65,691	59,826	98,435	87,849
Residential and commercial | Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	2,955	3,185	5,692	8,206
Residential and commercial | Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	38,206	38,981	82,822	70,321
All other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	1,278	901	1,901	1,451
All other | United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	1,278	901	1,901	1,451
All other | Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
All other | Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	254	(5)	(226)	(142)
All other | Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
All other | Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
All other | Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	$ 1,024	$ 906	$ 2,127	$ 1,593