The Davey 401KSOP and Employee Stock Ownership Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
401KSOP and Employee Stock Ownership Plan [Abstract]
Employee stock ownership plan (ESOP), initial shares in ESOP	120,000
Employee Stock Ownership Plan (ESOP), shares adjusted for stock splits	46,080,000
Employee stock ownership plan (ESOP), initial value in ESOP	$ 2,700
Defined contribution plan, eligible age	21 years
Defined contribution plan, service requirement for eligibility (in years)	1 year
Number of put option periods	2
Duration of put option periods (in days)	60 days
Employee Stock Ownership Plan (ESOP), fair value of shares subject to repurchase obligation	$ 9,831	$ 2,018
Company shares held in 401KSOP and ESOP, fair value	203,717	193,533
Redeemable common shares related to 401KSOP and Employee Stock Ownership Plan (ESOP):	213,548	195,551
Employee retirement plan, employer match	$ 12,790	11,729	$ 10,441
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Employee stock ownership plan (ESOP), initial shares in ESOP	120,000
Employee Stock Ownership Plan (ESOP), shares adjusted for stock splits	46,080,000
Employee stock ownership plan (ESOP), initial value in ESOP	$ 2,700
Defined contribution plan, eligible age	21 years
Defined contribution plan, service requirement for eligibility (in years)	1 year
Number of put option periods	2
Duration of put option periods (in days)	60 days
Employee Stock Ownership Plan (ESOP), fair value of shares subject to repurchase obligation	$ 9,831	2,018
Company shares held in 401KSOP and ESOP, fair value	203,717	193,533
Redeemable common shares related to 401KSOP and Employee Stock Ownership Plan (ESOP):	213,548	195,551
Employee retirement plan, employer match	$ 12,790	$ 11,729	$ 10,441
First 3% [Member]
401KSOP and Employee Stock Ownership Plan [Abstract]
Defined contribution plan, employer matching contribution, percent of match	100.00%
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of match	100.00%
3% to 5% [Member]
401KSOP and Employee Stock Ownership Plan [Abstract]
Defined contribution plan, employer matching contribution, percent of match	50.00%
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of match	50.00%
Maximum | First 3% [Member]
401KSOP and Employee Stock Ownership Plan [Abstract]
Defined contribution plan, employer matching contribution, percent of employees gross pay	3.00%
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of employees gross pay	3.00%
Maximum | 3% to 5% [Member]
401KSOP and Employee Stock Ownership Plan [Abstract]
Defined contribution plan, employer matching contribution, percent of employees gross pay	2.00%
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of employees gross pay	2.00%