The Davey 401KSOP and Employee Stock Ownership Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
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, employer matching contribution, percent of employees gross pay	4.00%
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	$ 5,272	$ 1,833
Company shares held in 401KSOP and ESOP, fair value	183,408	168,145
Redeemable common shares related to 401KSOP and Employee Stock Ownership Plan (ESOP):	188,680	169,978
Employee retirement plan, employer match	$ 10,441	$ 9,490	$ 8,485
First 3% [Member]
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of match	100.00%
3% to 5% [Member]
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of match	50.00%
Maximum [Member] | First 3% [Member]
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of employees gross pay	3.00%
Maximum [Member] | 3% to 5% [Member]
Employee Stock Ownership Plan (ESOP) disclosures [Line Items]
Defined contribution plan, employer matching contribution, percent of employees gross pay	2.00%