Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Revenue Recognition (Details) - USD ($) $ in Thousands	Jul. 04, 2026	Jun. 28, 2025	Jul. 04, 2026	Jun. 28, 2025
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	$ 518,933	$ 512,445	$ 954,708	$ 947,281
United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	486,167	479,984	901,700	895,710
Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	32,766	32,461	53,008	51,571
Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	306,359	296,844	563,728	547,509
Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	68,953	69,253	112,503	108,662
Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	5,339	18,951	19,147	54,987
Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	138,282	127,397	259,330	236,123
Utility
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	266,075	266,896	529,544	522,003
Utility \| United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	248,226	251,298	500,715	495,740
Utility \| Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	17,849	15,598	28,829	26,263
Utility \| Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	176,583	167,410	344,757	332,206
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	1,524	13,342	10,301	31,799
Utility \| Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	87,968	86,144	174,486	157,998
Residential and commercial
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	251,121	244,924	422,986	424,054
Residential and commercial \| United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	236,204	228,061	398,807	398,746
Residential and commercial \| Canada
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	14,917	16,863	24,179	25,308
Residential and commercial \| Tree and plant care
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	130,388	129,829	219,983	216,088
Residential and commercial \| Grounds maintenance
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	68,953	69,253	112,503	108,662
Residential and commercial \| Storm damage services
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	3,815	5,609	8,846	23,188
Residential and commercial \| Consulting and other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	47,965	40,233	81,654	76,116
All other
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	1,737	625	2,178	1,224
All other \| United States
Disaggregation of revenue [Line Items]
Revenue from contracts with customers	1,737	625	2,178	1,224
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	(612)	(395)	(1,012)	(785)
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	$ 2,349	$ 1,020	$ 3,190	$ 2,009