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2418408 - Disclosure - Defined Benefit Pension Plans Components of Pension Expense (Details)
(http://www.davey.com/role/DefinedBenefitPensionPlansComponentsOfPensionExpenseDetails)
TableDefined Benefit Plans and Other Postretirement 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 Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Service costs--increase in benefit obligation earned
370,000  
35,000  
51,000  
Interest cost on projected benefit obligation
1,243,000  
1,486,000  
1,618,000  
Expected return on plan assets
(1,044,000) 
(1,576,000) 
(1,993,000) 
Curtailment loss
0  
49,000  
0  
Settlement loss
2,346,000  
2,915,000  
2,065,000  
Amortization of net actuarial loss
951,000  
1,400,000  
708,000  
Amortization of prior service cost
0  
6,000  
14,000  
Net pension expense of defined benefit pension plans
3,866,000  
 
4,315,000  
 
2,463,000