Commitments and contingencies	9 Months Ended
Commitments and contingencies	Sep. 26, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies [Text Block]	Commitments and Contingencies We are party to a number of lawsuits, threatened lawsuits and other claims arising out of the normal course of business. On a quarterly basis, we assess our liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that we will incur a loss and the amount of the loss can be reasonably estimated, we record a liability in our consolidated financial statements. These legal accruals may be increased or decreased to reflect any relevant developments on a quarterly basis. Where a loss is not probable or the amount of the loss is not estimable, we do not record a legal accrual, consistent with applicable accounting guidance. Based on information currently available to us, advice of counsel, and available insurance coverage, we believe that our established accruals are adequate and the liabilities arising from the legal proceedings will not have a material adverse effect on our consolidated financial condition. We note, however, that in light of the inherent uncertainty in legal proceedings there can be no assurance that the ultimate resolution of a matter will not exceed established accruals. As a result, the outcome of a particular matter or a combination of matters may be material to our results of operations for a particular period, depending upon the size of the loss or our income for that particular period. In November 2017, a suit was filed in Savannah, Georgia state court (“State Court”) against Davey Tree, its subsidiary, Wolf Tree, Inc. ("Wolf Tree"), one former Davey employee, two Wolf Tree employees, and one former Wolf Tree employee alleging various acts of negligence and seeking compensatory and punitive damages for wrongful death and assault and battery of the plaintiff’s husband, a Wolf Tree employee, who was shot and killed in August 2017. In July 2018, a related survival action was filed by the deceased’s estate against Davey Tree, its subsidiary, Wolf Tree, and four current and former employees in Savannah, Georgia, which arises out of the same allegations, seeks compensatory and punitive damages and also includes three Racketeer Influenced and Corrupt Organizations Act ("RICO") claims under Georgia law seeking compensatory damages, treble damages, and punitive damages. The 2018 case was removed to the United States District Court for the Southern District of Georgia, Savannah Division (“Federal Court”), on August 2, 2018. The Company filed a motion to dismiss the RICO claims. Plaintiffs filed a motion to remand the case to state court, which the Company has opposed. The cases were mediated unsuccessfully in December 2018 and the State Court case was originally set for trial on January 22, 2019. However, as discussed below, all of the civil cases were later stayed on December 28, 2018 and currently remain stayed. On December 6, 2018, a former Wolf Tree employee pled guilty to conspiracy to conceal, harbor, and shield illegal aliens. On December 21, 2018, the United States federal prosecutors filed a motion to stay both actions on the grounds that on December 13, 2018, an indictment was issued charging two former Wolf Tree employees and one other individual with various crimes, including conspiracy to murder the deceased. On December 17, 2018, the United States Attorney’s Office for the Southern District of Georgia informed the Company and Wolf Tree that they are also under investigation for potential violations of immigration and other laws relating to the subject matter of the ongoing criminal investigation referenced above. The Company and Wolf Tree are cooperating with the investigation. On December 28, 2018, the State Court granted the United States’ motion to stay but indicated that it would nonetheless consider certain pending matters, including: (1) Plaintiff and a co-defendant’s motions that Davey Tree be forced to produce privileged documents and testimony, which had been submitted to a Special Master for recommendation; and (2) the Defendants’ motions for summary judgment. On January 11, 2019, the Special Master issued his recommendation that both Plaintiff and the co-defendant’s motions to force Davey to disclose privileged information be denied. The State Court judge has not yet moved on the recommendation. On January 29, 2019, the State Court heard oral argument on Defendants’ motions for summary judgment, and the motions remain pending during the stay of the cases. On January 28, 2019, the Federal Court also granted the United States’ motion to stay. On January 29, 2019, the State Court ordered the parties to return to mediation, which occurred on April 17, 2019 but was unsuccessful in resolving the matters. In both cases, the Company has denied all liability and is vigorously defending the action. It also has retained separate counsel for some of the individual defendants, each of whom has denied all liability and also is vigorously defending the action. PG&E Bankruptcy Filing On January 29, 2019, Pacific Gas & Electric Company, and its parent company PG&E Corporation, our largest utility customer, filed voluntary bankruptcy petitions under Chapter 11 of the United States Bankruptcy Code in the U.S. Bankruptcy Court for the Northern District of California. PG&E accounted for approximately 12% of revenues during 2019, and 12% in 2018. As a utility company, PG&E serves residential and industrial customers in California and has an ongoing obligation to continue to serve its customers, and we continue to perform under our contracts with PG&E post-petition. As of the date of the bankruptcy filing, we had pre-petition accounts receivable of approximately $15,000. On June 20, 2020, the Court confirmed PG&E's Plan of Reorganization (the "Plan") filed as part of its Chapter 11 bankruptcy proceeding. On July 1, 2020, PG&E emerged from Chapter 11, successfully completing its restructuring process and implementing the Plan. In the Plan, unsecured creditors, like Davey Tree, will be paid in full with interest accruing on the past amounts due at the federal judgment rate. Davey Tree has received the majority of its pre-petition amounts outstanding and expects to receive the balance before the end of 2020. Further, Davey Tree's primary contracts were assumed by PG&E. Due to PG&E’s implementation of the Plan, we do not anticipate PG&E's bankruptcy will have a material impact on our future cash flows or results of operations as we will receive full payment for the amounts owed. Northern California Wildfires On October 7, 2019 and October 8, 2019, four lawsuits were filed against multiple vegetation management contractors to PG&E, including Davey Tree, for damages resulting from the Northern California wildfires. The filing dates - exactly two years after the start of the fires - suggest that these lawsuits are intended to preserve any claims that might otherwise have become barred by the applicable statute of limitations. Davey Tree has been served with only one of the four complaints, in the case of Quinisha Kyree Abram v. ACRT, Inc., et. al, Case No. CGC-19-579861 filed in the Superior Court of the State of California, County of San Francisco (the “Abram case”). The Abram case was initially stayed until July 29, 2020, and later was stayed until September 30, 2020. The Court then vacated the September 30, 2020 case management conference and issued an order to show cause regarding dismissal for failure to serve the first amended complaint, which Plaintiffs had not yet served. The hearing on the order to show cause is November 24, 2020. Davey Tree has filed a demurrer and motion to dismiss in this action to the original complaint. In the PG&E bankruptcy, the Tort Committee, representing wildfire victims from both the 2017 and 2018 Northern California wildfires, served subpoenas related to these wildfires on numerous contractors of PG&E, including Davey Tree Surgery Company, Davey Resource Group, and Davey Tree, to which we responded. In addition, an action was brought against Davey Tree in Napa County Superior Court, entitled Donna Walker, et al. v. Davey Tree Surgery Company on August 8, 2019. On October 8, 2019, the court issued an order staying that action. The court deferred ruling on Davey’s demurrer and motion to dismiss the complaint based on the absence of PG&E as an indispensable party. The court stayed any activity in the case until until December 15, 2020. In all cases, the Company has denied all liability and will vigorously defend the actions.