Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, percentage of outstanding stock maximum			5.00%
Share-based compensation arrangement by share-based payment award, percentage of outstanding and available for grant, maximum			10.00%
Compensation expense, share-based payment plans	$ 1,736	$ 1,741	$ 6,165	$ 6,868
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Volatility rate			9.40%	9.50%
Risk-free interest rate			3.90%	4.60%
Expected dividend yield			0.40%	0.40%
Expected life of awards (years)			3 years	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Exercisable, ending balance	966,364		966,364
Stock option plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans			$ 36	$ 74
Stock options awarded, term (years)			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance			1,278,798
Granted			0
Exercised			(246,084)
Forfeited			(66,350)
Outstanding, ending balance	966,364		966,364
Exercisable, ending balance	966,364		966,364
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average exercise price, beginning balance			$ 9.56
Granted, weighted average exercise price			0
Exercised, weighted average exercise price			8.63
Forfeited, weighted average exercise price			7.53
Outstanding, weighted average exercise price, ending balance	$ 9.93		9.93
Exercisable, weighted average exercise price, ending balance	$ 9.93		$ 9.93
Outstanding, weighted average remaining contractual life (years)			2 years 9 months 18 days
Exercisable, weighted average remaining contractual life (years)			2 years 9 months 18 days
Outstanding, aggregate intrinsic value	$ 15,046		$ 15,046
Exercisable, aggregate intrinsic value	$ 15,046		15,046
Restricted stock units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans			$ 4,441	5,214
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested, beginning balance			767,832
Granted			276,959
Forfeited			(14,890)
Vested			(436,368)
Unvested, ending balance	593,533		593,533
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested, weighted average award date value, beginning balance			$ 18.32
Granted, weighted average award date value			23.80
Forfeited, weighted average award date value			21.40
Vested, weighted average award date value			16.89
Unvested, weighted average award date value, ending balance	$ 21.84		$ 21.84
Weighted average remaining contractual life (years)			1 year 9 months 18 days
Unrecognized compensation cost	$ 7,137		$ 7,137
Aggregate intrinsic value	$ 15,135		$ 15,135
Employee PRSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Granted			266,255
Unvested, ending balance	561,945		561,945
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested, weighted average award date value, ending balance	$ 21.88		$ 21.88
Weighted average remaining contractual life (years)			1 year 9 months 18 days
Unrecognized compensation cost	$ 6,759		$ 6,759
Aggregate intrinsic value	$ 14,330		$ 14,330
Nonemployee Director RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Granted			10,704
Unvested, ending balance	31,588		31,588
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested, weighted average award date value, ending balance	$ 21.16		$ 21.16
Weighted average remaining contractual life (years)			1 year 7 months 6 days
Unrecognized compensation cost	$ 378		$ 378
Aggregate intrinsic value	$ 805		805
The Davey Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans			$ 1,688	$ 1,580
Employee stock purchase plan, service period			6 months
Employee stock purchase plan, percentage of market price, purchase date			85.00%
Employee stock purchase plan, discount from market price, purchase date			15.00%

DAVEY TREE EXPERT CO 10-Q