Rendering

Component: (Network and Table)
Network
2418402 - Disclosure - Defined Benefit Pension Plans Change in benefit obligation (Details)
(http://www.davey.com/role/DefinedBenefitPensionPlansChangeInBenefitObligationDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000277638 (http://www.sec.gov/CIK)
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]Defined Benefit Plan and Other Postretirement Benefit Plans [Domain]
Defined Benefit Plan, Asset Categories [Axis]Plan Asset Categories [Domain]
Fair value, hierarchy [Axis]Fair value, measurements, fair value hierarchy [Domain]
Defined benefit plan disclosure [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Defined benefit plan, change in benefit obligation [Roll Forward]
 
 
 
Projected benefit obligation at beginning of year
27,228,000  
35,876,000  
 
Service cost
370,000  
35,000  
51,000  
Interest cost
1,243,000  
1,486,000  
1,618,000  
Actuarial (gains)/losses
1,150,000  
(2,445,000) 
 
New longevity assumptions
(447,000) 
(340,000) 
 
Amendments
341,000  
0  
 
Curtailments
0  
(404,000) 
 
Settlements
(4,873,000) 
(6,186,000) 
 
Benefits paid
(179,000) 
(794,000) 
 
Projected benefit obligation at end of year
24,833,000  
 
27,228,000  
 
35,876,000  
 
Accumulated benefit obligation at end of year
24,833,000  
27,228,000