Davey Tree Expert 10-Q 2 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jul. 01, 2017	Jul. 28, 2017
Entity Information [Line Items]
Entity registrant name	DAVEY TREE EXPERT CO
Entity central index key	277,638
Current fiscal year end date	--12-31
Entity filer category	Accelerated Filer
Document type	10-Q
Document period end date	Jul. 1, 2017
Document fiscal year focus	2,017
Document fiscal period focus	Q2
Amendment flag	false
Entity common stock, shares outstanding		24,579,989

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Jul. 01, 2017	Dec. 31, 2016
Current assets:
Cash		$ 9,683	$ 9,006
Accounts receivable, net		157,555	146,134
Operating supplies		10,878	7,277
Other current assets		9,644	16,356
Total current assets		187,760	178,773
Property and equipment		608,435	588,650
Less accumulated depreciation		409,677	409,214
Property and equipment, net		198,758	179,436
Other assets		32,299	31,354
Identified intangible assets and goodwill, net		41,355	34,376
Total assets		460,172	423,939
Current liabilities:
Accounts payable		38,507	41,283
Accrued expenses		37,622	37,659
Other current liabilities		33,071	39,963
Total current liabilities		109,200	118,905
Long-term debt		129,296	92,290
Self-insurance accruals		44,955	39,746
Other noncurrent liabilities		19,552	20,819
Total liabilities		303,003	271,760
Common shareholders' equity:
Common shares, $1.00 par value, per share; 48,000 shares authorized; 42,914 shares issued and outstanding before deducting treasury shares as of July 1, 2017 and December 31, 2016	[1]	42,914	42,914
Additional paid-in capital	[1]	7,899	2,429
Common shares subscribed, unissued		7,920	8,209
Retained earnings		299,521	290,292
Accumulated other comprehensive loss		(10,645)	(12,162)
Shareholders' equity before treasury stock		347,609	331,682
Less: Cost of common shares held in treasury; 18,336 shares at July 1, 2017 and 17,990 shares at December 31, 2016		187,888	176,530
Common shares subscription receivable		2,552	2,973
Common shareholders' equity		157,169	152,179
Total liabilities and shareholders' equity		$ 460,172	$ 423,939
[1]	Adjusted for two-for-one stock split

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares		Jul. 01, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common shares, par value		$ 1	$ 1
Common shares, authorized		48,000,000	48,000,000
Common shares, issued	[1]	42,914,000	42,914,000
Common shares, outstanding	[1]	42,914,000	42,914,000
Common shares held in treasury	[1]	18,336,000	17,990,000
[1]	Adjusted for two-for-one stock split

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Income Statement [Abstract]
Revenues		$ 245,037	$ 224,763	$ 437,850	$ 405,596
Costs and expenses:
Operating		151,525	137,132	285,184	260,305
Selling		40,816	36,859	76,350	71,189
General and administrative		15,560	14,675	32,307	31,814
Depreciation and amortization		13,000	12,290	25,190	23,631
Gain on sale of assets, net		(1,176)	(479)	(2,151)	(509)
Costs and expenses		219,725	200,477	416,880	386,430
Income from operations		25,312	24,286	20,970	19,166
Other income (expense):
Interest expense		(1,072)	(1,062)	(2,329)	(2,027)
Interest income		73	60	143	128
Other, net		(992)	(1,156)	(1,784)	(1,755)
Income before income taxes		23,321	22,128	17,000	15,512
Income taxes		9,098	8,819	6,664	6,391
Net income		$ 14,223	$ 13,309	$ 10,336	$ 9,121
Net income per share:
Basic	[1]	$ 0.57	$ 0.52	$ 0.41	$ 0.35
Diluted	[1]	$ 0.55	$ 0.50	$ 0.40	$ 0.34
Weighted-average shares outstanding:
Basic	[1]	24,998	25,740	24,984	25,958
Diluted	[1]	25,985	26,698	25,998	26,968
Dividends declared per share	[1]	$ 0.025	$ 0.025	$ 0.050	$ 0.050
[1]	Adjusted for two-for-one stock split

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 14,223	$ 13,309	$ 10,336	$ 9,121
Components of other comprehensive income/(loss), net of tax:
Foreign currency translation adjustments	881	245	1,203	1,997
Amortization of defined benefit pension items:
Net actuarial loss	147	146	294	508
Prior service cost	10	0	20	0
Defined benefit pension plan adjustments	157	146	314	508
Other comprehensive income, net of tax	1,038	391	1,517	2,505
Comprehensive income	$ 15,261	$ 13,700	$ 11,853	$ 11,626

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
Operating activities
Net income	$ 10,336	$ 9,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,190	23,631
Other	(909)	1,135
Changes in operating assets and liabilities:
Accounts receivable	(9,662)	(20,816)
Operating liabilities	1,123	570
Other, net	1,589	4,993
Adjustments to reconcile net income to net cash provided by operating activities:	17,331	9,513
Net cash provided by operating activities	27,667	18,634
Capital expenditures:
Equipment	(37,858)	(36,373)
Land and building	(2,992)	(1,463)
Purchases of businesses, net of cash acquired	(7,452)	(3,497)
Other	2,667	671
Net cash used in investing activities	(45,635)	(40,662)
Financing activities
Revolving credit facility proceeds, net	35,500	31,500
Purchase of common shares for treasury	(17,002)	(11,627)
Sale of common shares from treasury	10,136	8,155
Dividends	(1,268)	(1,314)
Payments of notes payable	(8,721)	(7,350)
Net cash provided by financing activities	18,645	19,364
Increase/(decrease) in cash	677	(2,664)
Cash, beginning of period	9,006	16,030
Cash, end of period	9,683	13,366
Supplemental cash flow information follows:
Interest paid	2,480	1,035
Income taxes paid	$ 3,179	$ 505

Basis of Financial Statement Pr

Basis of Financial Statement Preparation	6 Months Ended
	Jul. 01, 2017
Accounting Policies [Abstract]
Basis of Financial Statement Preparation [Text Block]	Basis of Financial Statement Preparation The condensed consolidated financial statements present the financial position, results of operations and cash flows of The Davey Tree Expert Company and its subsidiaries. When we refer to “we,” “us,” “our,” “Davey,” or “Davey Tree”, we mean The Davey Tree Expert Company and its subsidiaries, unless otherwise expressly stated or the context indicates otherwise. We have prepared the accompanying unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”), as codified in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), and with the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. The consolidated financial statements include all adjustments which, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. All such adjustments are of a normal, recurring nature. All significant intercompany accounts and transactions have been eliminated. Certain information and disclosures required by U.S. GAAP for complete financial statements have been omitted in accordance with the rules and regulations of the SEC. We suggest that these condensed consolidated financial statements be read in conjunction with the financial statements included in our annual report on Form 10-K for the year ended December 31, 2016 (the “ 2016 Annual Report”). Per Common Share Information --All common share and per share data have been retroactively adjusted to recognize a two -for-one stock split of our common shares effective June 1, 2017. Use of Estimates in Financial Statement Preparation --The preparation of financial statements in accordance with U.S. GAAP requires the use of estimates and assumptions that affect reported amounts. Our consolidated financial statements include amounts that are based on management’s best estimates and judgments. Estimates are used for, but not limited to, accounts receivable valuation, depreciable lives of fixed assets, self-insurance accruals, income taxes and revenue recognition. Actual results could differ from those estimates. Interim Results of Operations --Interim results may not be indicative of calendar year performance because of seasonal and short-term variations. Recent Accounting Guidance Accounting Standards Adopted in 2017 Accounting Standards Update 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting --In March 2016, the FASB issued ASU 2016-09, “Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting,” with the objective to simplify several aspects of the accounting for share-based payment transactions, including: the income tax consequences; classification of awards as either equity or liabilities; classification of certain items on the statement of cash flows; and, accounting for forfeitures. ASU 2016-09 became effective for Davey Tree on January 1, 2017 and we elected to make an accounting policy change to recognize forfeitures as they occur. The adoption impact on the consolidated condensed balance sheet was a cumulative-effect adjustment of $ 162 , increasing opening retained earnings and decreasing additional paid-in capital. A. Basis of Financial Statement Preparation (continued) Accounting Standards Not Yet Adopted Accounting Standards Update 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting --In May 2017, the FASB issued ASU 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting,” which provides guidance on which changes in the terms or conditions of a share-based payment award require modification accounting under Topic 718. Modification accounting is required for changes in terms or conditions unless the fair value, vesting condition and classification of the modified award is the same as the original award. The update is effective for annual and interim periods beginning after December 15, 2017, which for Davey Tree would be January 1, 2018. Early adoption is permitted. We do not expect the adoption of ASU 2017-09 to have a material impact on our consolidated financial statements. Accounting Standards Update 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment -- In January 2017, the FASB issued ASU 2017-04, “Intangibles-Goodwill and Other (Topic 350),” which simplifies the subsequent measurement of goodwill by eliminating Step 2 of the goodwill impairment test which required entities to fair value their assets and liabilities using procedures that would be followed in an assumed business combination to arrive at the impairment charge. Under ASU 2017-04, the goodwill impairment test is performed by comparing the fair value of the reporting unit with its carrying amount and an impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value. The update is effective for annual or interim periods beginning after December 15, 2019, which for Davey Tree is January 1, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. The Company intends to early adopt ASU 2017-04 during the fourth quarter 2017 and does not expect the adoption to have a material effect on the Company’s consolidated financial statements or related disclosures. Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force) --In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which provides guidance on how cash receipts and cash payments related to eight specific cash flow issues are presented and classified in the statement of cash flows, with the objective of reducing the existing diversity in practice. The update is effective for annual periods beginning after December 15, 2017, which for Davey Tree would be January 1, 2018. Early adoption is permitted. We do not expect the adoption of ASU 2016-15 to have a material impact on our consolidated financial statements. Accounting Standards Update 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost --In March 2017, the FASB issued ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which changes the presentation of net periodic benefit cost related to employer sponsored defined benefit plans and other postretirement benefits. Under ASU 2017-07, service costs will be included within the same income statement line item as other compensation costs arising from services rendered by pertinent employees during the period. The other components of net periodic benefit pension cost will be presented separately outside of income from operations. Additionally, only service costs may be capitalized in assets. ASU 2017-07 is effective for fiscal years beginning after December 15, 2017, which for Davey Tree is January 1, 2018. Management has not yet completed its assessment of the impact of the new standard on the Company’s consolidated financial statements. A. Basis of Financial Statement Preparation (continued) Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606 )--In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” which will replace all current U.S. GAAP guidance on revenue recognition and eliminate all industry-specific guidance. The new revenue recognition guidance provides a unified model to determine when and how revenue is recognized. The underlying principle is that an entity should recognize revenue to depict the transfer of promised goods and services to customers in an amount that reflects the consideration which the entity expects to receive in exchange for those goods and services. The guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. Other major provisions include capitalization of certain contract costs, consideration of the time value of money in the transaction price, and allowing estimates of variable consideration to be recognized before contingencies are resolved in certain circumstances. The guidance also requires enhanced information to be presented in the financial statements regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. Subsequent to the issuance of ASU 2014-09, the FASB has provided additional implementation guidance updates related to ASU 2014-09, including: a. ASU 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date (‘Update 2015-14’),” which responded to stakeholders’ requests to defer the effective date of the guidance in ASU 2014-09. b. ASU 2016-08 , “Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net ) (‘Update 2016-08’),” which clarifies the implementation guidance on principal versus agent considerations. c. ASU 2016-10, “Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing (‘Update 2016-10’),” which clarifies multiple aspects of Topic 606. d. ASU 2016-12, “Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients (‘Update 2016-12’),” which provides clarifying guidance in a few narrow areas and adds some practical expedients to the guidance. The effective date and the transition requirements for the Updates are the same as the effective date of Topic 606 ASU 2015-14, which becomes effective for Davey Tree beginning with the first quarter 2018 and can be adopted either retrospectively to each prior reporting period presented or as a cumulative-effect adjustment as of the date of adoption. The FASB also affirmed its proposal to permit all entities to apply the new revenue standard early, but not before the original effective date, which for Davey Tree would be the first quarter 2017. The new revenue guidance will supersede existing revenue guidance affecting our Company, and may also affect our business processes and our information technology systems. Management has assembled an internal project team and is analyzing contracts with our customers covering the significant streams of the Company’s annual revenues under the provisions of the new standard. The analysis of contracts with customers is time-consuming given the unique nature of the individual contracts with our customers and is expected to be completed in the near future. While the full impact of adopting the standard is not currently known, the Company currently has identified certain impacts related to the recognition of certain variable, incentive-based components of contracts related to the timing of revenue recognition. The Company is continuing to assess all other aspects of the standard and the identification of other accounting impacts is possible. The Company has evaluated the disclosure requirements under the standard and is in the process of implementing A. Basis of Financial Statement Preparation (continued) necessary changes to our systems, policies and the related internal controls as a result. We plan to adopt ASU 2014-09 using the modified retrospective approach effective January 1, 2018. Accounting Standards Update 2016-02, Leases (Topic 842)-- In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” ASU 2016-02 establishes a comprehensive new lease accounting model. The new standard: (a) clarifies the definition of a lease; (b) requires a dual approach to lease classification similar to current lease classifications; and, (c) causes lessees to recognize leases on the balance sheet as a lease liability with a corresponding right-of-use asset for leases with a lease-term of more than twelve months. The new standard is effective for interim and annual periods beginning after December 15, 2018, which for Davey Tree would be January 1, 2019. Early adoption is permitted. The new standard requires a modified retrospective transition for capital or operating leases existing at or entered into after the beginning of the earliest comparative period presented in the financial statements, but it does not require transition accounting for leases that expire prior to the date of initial application. We are currently evaluating the impact of the new standard on our consolidated financial statements.

Seasonality of Business

Seasonality of Business	6 Months Ended
	Jul. 01, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information, Explanatory Disclosure	Seasonality of Business Due to the seasonality of our business, our operating results for the six months ended July 1, 2017 are not indicative of results that may be expected for any other interim period or for the year ending December 31, 2017 . Business seasonality traditionally results in higher revenues during the second and third quarters as compared with the first and fourth quarters of the year, while the methods of accounting for fixed costs, such as depreciation expense, amortization, rent and interest expense, are not significantly impacted by business seasonality.

Accounts Receivable, Net and Su

Accounts Receivable, Net and Supplemental Balance-Sheet Information	6 Months Ended
	Jul. 01, 2017
Accounts Receivable, Net and Supplemental Balance-Sheet Information [Abstract] [Abstract]
Accounts receivable net and supplemental balance-sheet information [Text Block]	Accounts Receivable, Net and Supplemental Balance-Sheet Information Accounts receivable, net, consisted of the following: Accounts receivable, net July 1, December 31, Accounts receivable $ 126,751 $ 128,202 Receivables under contractual arrangements 34,293 21,541 161,044 149,743 Less allowances for doubtful accounts 3,489 3,609 Accounts receivable, net $ 157,555 $ 146,134 Receivables under contractual arrangements consist of work-in-process in accordance with the terms of contracts, primarily with utility services customers. C. Accounts Receivable, Net and Supplemental Balance-Sheet Information (continued) The following items comprise the amounts included in the balance sheets: Other current assets July 1, December 31, Refundable income taxes $ 94 $ 548 Prepaid expense 9,251 14,493 Other 299 1,315 Total $ 9,644 $ 16,356 Accrued expenses July 1, December 31, Employee compensation $ 14,189 $ 18,438 Accrued compensated absences 9,663 9,215 Self-insured medical claims 5,428 2,961 Income tax payable 3,744 953 Customer advances, deposits 756 2,997 Taxes, other than income 2,431 2,166 Other 1,411 929 Total $ 37,622 $ 37,659

Business Combinations (Notes)

Business Combinations (Notes)	6 Months Ended
	Jul. 01, 2017
Business Combinations [Abstract]
Business Combinations	Business Combinations Our investment in businesses during the first six months of 2017 was $10,877 , including debt issued, in the form of notes payable to the sellers, of $3,099 , and have been included in our residential and commercial segment. Measurement-period adjustments are not complete. The measurement period for purchase price allocations ends as soon as information of the facts and circumstances becomes available, but does not exceed one year from the acquisition date. During the six months ended July 2, 2016 , our investment in businesses was $ 4,170 , with liabilities assumed of $ 98 and $575 debt issued. I n March 2017, the Company acquired all of the outstanding common stock of Arborguard Tree Specialists Inc. (“Arborguard”), a residential and commercial tree care company, and certain assets of TTS&G, LLC, a leasing company related to Arborguard, for $7,200 in cash, with liabilities assumed of $1,416 and debt issued of $2,724 . Arborguard’s revenue for the year ended February 28, 2017 was approximately $10,711 . The acquisition of Arborguard was accounted for under the acquisition method of accounting. The entire purchase price allocation for Arborguard is preliminary. At July 1, 2017, the fair values of the assets acquired and liabilities assumed have been preliminarily estimated and the excess consideration of $3,104 has been preliminarily recorded as goodwill pending finalization of the fair value. These preliminary estimates will be revised during the measurement period in 2017 as all pertinent information regarding finalization of the valuations for fixed assets, intangible assets, goodwill (including the amount expected to be deductible for tax purposes), tangible assets, other liabilities and deferred income tax assets and liabilities acquired are fully evaluated by the Company. D. Business Combinations (continued) The following table summarizes the preliminary purchase price allocation of the estimated fair values of the assets acquired and liabilities assumed: Six Months Ended July 1, 2017 Detail of acquisitions: Assets acquired: Cash $ 326 Receivables 1,759 Prepaid expense 128 Equipment 1,904 Deposits and other 129 Finite-lived intangibles 4,566 Goodwill 3,504 Liabilities assumed (1,439 ) Debt issued for purchases of businesses (3,099 ) Cash paid $ 7,778 The results of operations of acquired businesses have been included in the consolidated statements of operations beginning as of the effective dates of acquisition. The effect of these acquisitions on our consolidated revenues and results of operations for the period ending July 1, 2017 was not significant. Pro forma net sales and results of operations for the acquisition had it occurred at the beginning of the six months ended July 1, 2017 are not material and, accordingly, are not provided.

Identified Intangible Assets an

Identified Intangible Assets and Goodwill, Net	6 Months Ended
	Jul. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Identified intangible assets and goodwill, net [Text Block]	Identified Intangible Assets and Goodwill, Net The carrying amounts of the identified intangibles and goodwill acquired in connection with our historical investments in businesses were as follows: July 1, 2017 December 31, 2016 Identified Intangible Assets and Goodwill, Net Carrying Amount Accumulated Amortization Carrying Amount Accumulated Amortization Amortized intangible assets: Customer lists/relationships $ 21,711 $ 16,036 $ 17,822 $ 15,171 Employment-related 7,389 6,499 7,032 6,386 Tradenames 5,960 5,001 5,634 4,860 Amortized intangible assets $ 35,060 $ 27,536 $ 30,488 $ 26,417 Less accumulated amortization 27,536 26,417 Identified intangibles, net 7,524 4,071 Unamortized intangible assets: Goodwill 33,831 30,305 $ 41,355 $ 34,376 The changes in the carrying amounts of goodwill, by segment, for the year ended December 31, 2017 follow: Balance at January 1, 2017 Acquisitions Translation and Other Adjustments Balance at July 1, 2017 Utility $ 3,424 $ — $ — $ 3,424 Residential and Commercial 26,881 3,504 22 30,407 Total $ 30,305 $ 3,504 $ 22 $ 33,831

Long-Term Debt and Commitments

Long-Term Debt and Commitments Related to Letters of Credit	6 Months Ended
	Jul. 01, 2017
Debt Disclosure [Abstract]
Long-term debt and commitments related to letters of credit [Text Block]	Long-Term Debt and Commitments Related to Letters of Credit Our long-term debt consisted of the following: July 1, December 31, Revolving credit facility Swing-line borrowings $ 7,500 $ 10,000 LIBOR borrowings 95,000 57,000 102,500 67,000 Senior unsecured notes 24,000 24,000 Term loans 10,252 16,151 Capital leases 2,620 2,343 139,372 109,494 Less debt issuance costs 263 333 Less current portion 9,813 16,871 $ 129,296 $ 92,290 Revolving Credit Facility --We have a $175,000 revolving credit facility with a group of banks, which will expire in November 2018 and permits borrowings, as defined, up to $175,000 , including a letter of credit sublimit of $100,000 and a swing-line commitment of $15,000 . Under certain circumstances, the amount available under the revolving credit facility may be increased to $210,000 . The revolving credit facility contains certain affirmative and negative covenants customary for this type of facility and includes financial covenant ratios with respect to a maximum leverage ratio and a maximum balance-sheet leverage ratio. As of July 1, 2017 , we had unused commitments under the facility approximating $68,429 , with $106,571 committed, consisting of borrowings of $102,500 and issued letters of credit of $4,071 . Borrowings outstanding bear interest, at Davey Tree’s option, of either (a) a base rate or (b) LIBOR plus a margin adjustment ranging from .75% to 1.50% --with the margin adjustments in both instances based on the Company's leverage ratio at the time of borrowing. The base rate is the greater of (i) the agent bank’s prime rate, (ii) LIBOR plus 1.50% , or (iii) the federal funds rate plus .50% . A commitment fee ranging from .10% to .25% is also required based on the average daily unborrowed commitment. 5.09 % Senior Unsecured Notes --The senior unsecured notes are due July 22, 2020 and were issued during July 2010 as 5.09 % Senior Unsecured Notes, Series A (the " 5.09 % Senior Notes"), pursuant to a Master Note Purchase Agreement (the “Purchase Agreement”) between the Company and the purchasers of the 5.09 % Senior Notes. The 5.09 % Senior Notes are equal in right of payment with our revolving credit facility and all other senior unsecured obligations of the Company. Interest is payable semiannually and five equal, annual principal payments commenced on July 22, 2016 (the sixth anniversary of issuance). The Purchase Agreement contains customary events of default and covenants related to limitations on indebtedness and transactions with affiliates and the maintenance of certain financial ratios. F. Long-Term Debt and Commitments Related to Letters of Credit (continued) Accounts Receivable Securitization Facility --On May 8, 2017, the Company amended its Accounts Receivable Securitization Facility (the "AR Securitization program") to extend the scheduled termination date for an additional one -year period and increase the limit of the facility from $60,000 to $100,000 . As of July 1, 2017 , we had issued letters of credit of $58,150 under the terms of the AR securitization program. Under the AR securitization program, Davey Tree transfers by selling or contributing current and future trade receivables to a wholly-owned, bankruptcy-remote financing subsidiary which pledges a perfected first priority security interest in the trade receivables--equal to the issued letters of credit as of July 1, 2017 --to the bank in exchange for the bank issuing letters of credit ("LCs"). Fees payable to the bank include: (a) an LC issuance fee, payable on each settlement date, in the amount of .90% per annum on the aggregate amount of all LCs outstanding plus outstanding reimbursement obligations (e.g., arising from drawn LCs), if any, and (b) an unused LC fee, payable monthly, equal to (i) .35% per annum for each day on which the sum of the total LCs outstanding plus any outstanding reimbursement obligations is greater than or equal to 50% of the facility limit and (ii) .45% per annum for each day on which the sum of the total LCs outstanding plus any outstanding reimbursement obligations is less than 50% of the facility limit. If an LC is drawn and the bank is not immediately reimbursed in full for the drawn amount, any outstanding reimbursement obligation will accrue interest at a per annum rate equal to a reserve-adjusted LIBOR or, in certain circumstances, a base rate equal to the higher of (i) the bank’s prime rate and (ii) the federal funds rate plus .50% and, following any default, 2.00% plus the greater of (a) adjusted LIBOR and (b) a base rate equal to the higher of (i) the bank’s prime rate and (ii) the federal funds rate plus .50% . The agreements underlying the AR securitization program contain various customary representations and warranties, covenants, and default provisions which provide for the termination and acceleration of the commitments under the AR securitization program in circumstances including, but not limited to, failure to make payments when due, breach of a representation, warranty or covenant, certain insolvency events or failure to maintain the security interest in the trade receivables, and defaults under other material indebtedness. Total Commitments Related to Issued Letters of Credit --As of July 1, 2017 , total commitments related to issued letters of credit were $64,221 , of which $4,071 were issued under the revolving credit facility, $58,150 were issued under the AR securitization program, and $2,000 were issued under short-term lines of credit. As of December 31, 2016 , total commitments related to issued letters of credit were $64,225 , of which $4,071 were issued under the revolving credit facility, $58,150 were issued under the AR securitization facility, and $2,004 were issued under short-term lines of credit.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jul. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation[Text Block]	Stock-Based Compensation Our shareholders approved the 2014 Omnibus Stock Plan (the “2014 Stock Plan”) at our annual meeting of shareholders on May 20, 2014. The 2014 Stock Plan replaced the expired 2004 Omnibus Stock Plan (the “2004 plan”) previously approved by the shareholders in 2004. The 2014 Stock Plan is administered by the Compensation Committee of the Board of Directors and has a term of ten years. All directors of the Company and employees of the Company and its subsidiaries are eligible to participate in the 2014 Stock Plan. The 2014 Stock Plan (similar to the 2004 plan) continues the maintenance of the Employee Stock Purchase Plan, as well as provisions for the grant of stock options and other stock-based incentives. The 2014 Stock Plan provides for the grant of five percent of the number of the Company’s common shares outstanding as of the first day of each fiscal year plus the number of common shares that were available for grant of awards, but not granted, in prior years. In no event, however, may the number of common shares available for the grant of awards in any fiscal year exceed ten percent of the common shares outstanding as of the first day of that fiscal year. Common shares subject to an award that is forfeited, terminated, or canceled without having been exercised are generally added back to the number of shares available for grant under the 2014 Stock Plan. Stock-based compensation expense under all share-based payment plans -- our Employee Stock Purchase Plan, stock option plans, stock-settled stock appreciation rights and restricted stock units -- included in the results of operations follows: Three months ended Six Months Ended July 1, July 2, July 1, July 2, Compensation expense, all share-based payment plans $ 1,462 $ 678 $ 2,448 $ 1,324 Stock-based compensation consisted of the following: Employee Stock Purchase Plan --Under the Employee Stock Purchase Plan, all full-time employees with one year of service are eligible to purchase, through payroll deduction, common shares. Employee purchases under the Employee Stock Purchase Plan are at 85% of the fair market value of the common shares--a 15% discount. We recognize compensation costs as payroll deductions are made. The 15% discount of total shares purchased under the plan resulted in compensation cost of $415 being recognized for the six months ended July 1, 2017 and $337 for the six months ended July 2, 2016 . Stock Option Plans --The stock options outstanding were awarded under a graded vesting schedule, measured at fair value, and have a term of ten years. Compensation costs for stock options are recognized over the requisite service period on the straight-line recognition method. Compensation cost recognized for stock options was $395 for the six months ended July 1, 2017 and $270 for the six months ended July 2, 2016 . Stock-Settled Stock Appreciation Rights -- During the six months ended July 1, 2017 , the Compensation Committee awarded 152,000 stock-settled stock appreciation rights (“SSARs”) to certain management employees, which vest ratably over five years. A SSAR is an award that allows the recipient to receive common shares equal to the appreciation in the fair market value of our common shares between the date the award was granted and the conversion date of the shares vested. G. Stock-Based Compensation (continued) The following table summarizes our SSARs as of July 1, 2017 . Stock-Settled Stock Appreciation Rights Number Rights Weighted- Average Award Date Value Weighted- Life Unrecognized Cost Aggregate Value Unvested, January 1, 2017 743,662 $ 2.75 Granted 152,000 3.57 Forfeited — — Vested (240,546 ) 2.59 Unvested, July 1, 2017 655,116 $ 3.00 2.7 years $ 1,301 $ 11,530 Employee SSARs 655,116 $ 3.00 2.7 years $ 1,301 $ 11,530 Compensation costs for SSARs are determined using a fair-value method and amortized over the requisite service period. Compensation expense for SSARs was $757 for the six months ended July 1, 2017 and $292 for the six months ended July 2, 2016 . Restricted Stock Units --During the six months ended July 1, 2017 , the Compensation Committee awarded 80,350 performance-based restricted stock units to certain directors and management employees. The Compensation Committee made similar awards in prior periods. The awards vest over specified periods. The following table summarizes restricted stock units as of July 1, 2017 . Restricted Stock Units Number Units Weighted- Average Grant Date Value Weighted- Average Remaining Contractual Life Unrecognized Cost Aggregate Intrinsic Value Unvested, January 1, 2017 304,958 $ 13.22 Granted 80,350 17.01 Forfeited — — Vested (49,964 ) 11.38 Unvested, July 1, 2017 335,344 $ 14.40 2.8 years $ 2,604 $ 5,902 Compensation cost for restricted stock awards is determined using a fair-value method and amortized on the straight-line recognition method over the requisite service period. Compensation expense on restricted stock awards totaled $881 for the six months ended July 1, 2017 and $425 for the six months ended July 2, 2016 . We estimated the fair value of each stock-based award on the date of grant using a binomial option-pricing model. The binomial model considers a range of assumptions related to volatility, risk-free interest rate and employee G. Stock-Based Compensation (continued) exercise behavior. Expected volatilities utilized in the binomial model are based on historical volatility of our stock prices and other factors. Similarly, the dividend yield is based on historical experience and expected future changes. The binomial model also incorporates exercise assumptions based on an analysis of historical data. The expected life of the stock-based awards is derived from the output of the binomial model and represents the period of time that awards granted are expected to be outstanding. The fair values of stock-based awards granted were estimated at the dates of grant with the following weighted-average assumption. Six Months Ended July 1, July 2, Volatility rate 10.3 % 10.6 % Risk-free interest rate 2.2 % 1.8 % Expected dividend yield .7 % .7 % Expected life of awards (years) 8.9 9.5 General Stock Option Information --The following table summarizes activity under the stock option plans for the six months ended July 1, 2017 . Stock Options Number Outstanding Weighted- Price Weighted- Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding, January 1, 2017 1,599,296 $ 12.49 Granted 148,500 17.60 Exercised (74,420 ) 10.40 Forfeited (64,574 ) 12.75 Outstanding, July 1, 2017 1,608,802 $ 13.05 6.7 years $ 7,320 Exercisable, July 1, 2017 869,302 $ 11.23 5.4 years $ 5,537 As of July 1, 2017 , there was approximately $1,438 of unrecognized compensation cost related to stock options outstanding. The cost is expected to be recognized over a weighted-average period of 2.3 years . “Intrinsic value” is defined as the amount by which the market price of a common share exceeds the exercise price of an option. Common shares are issued from treasury upon the exercise of stock options, SSARs, restricted stock units or purchases under the Employee Stock Purchase Plan.

Net Periodic Benefit Expense -

Net Periodic Benefit Expense - Defined Benefit Pension Plans	6 Months Ended
	Jul. 01, 2017
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Net periodic benefit expense--defined benefit pension plans [Text Block]	Net Periodic Benefit Expense--Defined Benefit Pension Plans The results of operations included the following net periodic benefit expense (income) recognized related to our defined-benefit pension plans. Three Months Ended Six Months Ended July 1, July 2, July 1, July 2, Components of pension expense (income) Service costs--increase in benefit obligation earned $ 132 $ 90 $ 265 $ 190 Interest cost on projected benefit obligation 264 310 527 627 Expected return on plan assets (170 ) (276 ) (339 ) (553 ) Settlement loss — — — 453 Amortization of net actuarial loss 238 237 475 480 Amortization of prior service cost 15 — 31 — Net pension expense of defined benefit pension plans $ 479 $ 361 $ 959 $ 1,197

Income Taxes

Income Taxes	6 Months Ended
	Jul. 01, 2017
Income Tax Disclosure [Abstract]
Income taxes [Text Block]	Income Taxes Our income tax provision for interim periods is determined using an estimate of our annual effective tax rate adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate and, if our estimated annual tax rate changes, we make a cumulative adjustment. The effective tax rate for the six months ended July 1, 2017 is estimated to approximate 39.2 %. Our effective tax rate for the six months ended July 2, 2016 was estimated at 41.2 %. At December 31, 2016 , we had unrecognized tax benefits of $2,532 , of which $2,053 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $107 . At July 1, 2017 , there were no significant changes in the unrecognized tax benefits, including the amount that would affect our effective rate if recognized, or the accrued interest expense related to the unrecognized benefits. Unrecognized tax benefits are the differences between a tax position taken, or expected to be taken in a tax return, and the benefit recognized for financial reporting purposes. The Company is routinely under audit by federal, state, local and Canadian authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. During the fourth quarter 2013, the U.S. Internal Revenue Service completed its audit of the Company's U.S. income tax returns for 2010 and 2011 and, during 2010, Canada Revenue Agency completed its audit of the Company's Canadian operations for 2006, 2007 and 2008. With the exception of U.S. state jurisdictions, the Company is no longer subject to examination by tax authorities for the years through 2012. As of July 1, 2017 , we believe it is reasonably possible that the total amount of unrecognized tax benefits will not significantly increase or decrease.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jul. 01, 2017
Equity [Abstract]
Accumulated other comprehensive income (loss) [Text Block]	Accumulated Other Comprehensive Income (Loss) Comprehensive income (or loss) is comprised of net income (or net loss) and other components, including currency translation adjustments and defined-benefit pension plan adjustments. The following summarizes the components of other comprehensive income (loss) accumulated in shareholders’ equity for the six months ended July 1, 2017 and six months ended July 2, 2016 : Foreign Currency Translation Adjustments Defined Benefit Pension Plans Accumulated Other Comprehensive Income (Loss) Balance at January 1, 2017 $ (5,500 ) $ (6,662 ) $ (12,162 ) Other comprehensive income (loss) before reclassifications Unrealized gains $ 1,203 $ — $ 1,203 Amounts reclassified from accumulated other comprehensive income (loss) — 506 506 Tax effect — (192 ) (192 ) Net of tax amount 1,203 314 1,517 Balance at July 1, 2017 $ (4,297 ) $ (6,348 ) $ (10,645 ) Foreign Currency Translation Adjustments Defined Benefit Pension Plans Accumulated Other Comprehensive Income (Loss) Balance at January 1, 2016 $ (6,244 ) $ (7,150 ) $ (13,394 ) Other comprehensive income (loss) before reclassifications Unrealized gains $ 1,997 $ — $ 1,997 Amounts reclassified from accumulated other comprehensive income (loss) — 829 829 Tax effect — (321 ) (321 ) Net of tax amount 1,997 508 2,505 Balance at July 2, 2016 $ (4,247 ) $ (6,642 ) $ (10,889 ) The change in defined benefit pension plans of $506 for the six months ended July 1, 2017 and the $829 for the six months ended July 2, 2016 is included in net periodic pension expense and is classified in the condensed statement of operations as costs and expenses, general and administrative.

Per Share Amounts and Common Sh

Per Share Amounts and Common Shares Outstanding	6 Months Ended
	Jul. 01, 2017
Equity [Abstract]
Per share amounts and common shares outstanding [Text Block]	Per Share Amounts and Common Shares Outstanding We calculate our basic earnings per share by dividing net income or net loss by the weighted average number of common shares outstanding during the period. Diluted earnings per share are calculated in a similar manner, but include the effect of dilutive securities. To the extent these securities are antidilutive, they are excluded from the calculation of earnings per share. The per share amounts were computed as follows (adjusted for the two -for-one stock split of our common shares effective June 1, 2017): Three Months Ended Six Months Ended July 1, July 2, July 1, July 2, Income available to common shareholders: Net income $ 14,223 $ 13,309 $ 10,336 $ 9,121 Weighted-average shares: Basic: Outstanding 24,797 25,528 24,582 25,534 Partially-paid share subscriptions 201 212 402 424 Basic weighted-average shares 24,998 25,740 24,984 25,958 Diluted: Basic from above 24,998 25,740 24,984 25,958 Incremental shares from assumed: Exercise of stock subscription purchase rights 141 136 143 136 Exercise of stock options and awards 846 822 871 874 Diluted weighted-average shares 25,985 26,698 25,998 26,968 Net income per share: Basic $ .57 $ .52 $ .41 $ .35 Diluted $ .55 $ .50 $ .40 $ .34 Common Shares Outstanding -- A summary of the activity of the common shares outstanding for the six months ended July 1, 2017 follows: Shares outstanding at January 1, 2017 24,923,140 Shares purchased (942,035 ) Shares sold 449,298 Stock subscription offering -- cash purchases 41,781 Options and awards exercised 105,819 (345,137 ) Shares outstanding at July 1, 2017 24,578,003 K. Per Share Amounts and Common Shares Outstanding (continued) On July 1, 2017 , we had 24,578,003 common shares outstanding, employee options exercisable to purchase 869,302 common shares, partially-paid subscriptions for 804,048 common shares and purchase rights outstanding for 319,956 common shares. Common Stock Split --On May 10, 2017, our Board of Directors declared a two -for-one stock split of our common shares, paid as a stock dividend to shareholders of record as of June 1, 2017. The par value of each common share remains at $1.00 . Accordingly, $21,457 was reclassified to the common shares account from additional paid-in capital and shareholders received one additional common share for each common share held. Stock Subscription Offering --Beginning May 2012, the Company offered to eligible employees and nonemployee directors the right to subscribe to common shares of the Company at $9.85 per share in accordance with the provisions of The Davey Tree Expert Company 2004 Omnibus Stock Plan and the rules of the Compensation Committee of the Company's Board of Directors (collectively, the "plan"). The offering period ended on August 1, 2012 and resulted in the subscription of 1,275,428 common shares for $12,563 at $9.85 per share. Under the plan, a participant in the offering purchasing common shares for an aggregate purchase price of less than $5 had to pay with cash. All participants (excluding Company directors and officers) purchasing $5 or more of the common shares had an option to finance their purchase through a down-payment of at least 10% of the total purchase price and a seven -year promissory note for the balance due with interest at 2% . Payments on the promissory note can be made either by payroll deductions or annual lump-sum payments of both principal and interest. Common shares purchased under the plan have been pledged as security for the payment of the promissory note and the common shares will not be issued until the promissory note is paid-in-full. Dividends will be paid on all subscribed shares, subject to forfeiture to the extent that payment is not ultimately made for the shares. All participants in the offering purchasing in excess of $5 of common shares were granted a "right" to purchase one additional common share at a price of $9.85 per share for every three common shares purchased under the plan. As a result of the stock subscription, employees were granted rights to purchase 423,600 common shares. Each right may be exercised at the rate of one-seventh per year and will expire seven years after the date that the right was granted. Employees may not exercise a right should they cease to be employed by the Company.

Operations by Business Segment

Operations by Business Segment	6 Months Ended
	Jul. 01, 2017
Segment Reporting [Abstract]
Operations by business segment [Text Block]	Operations by Business Segment We provide a wide range of arboricultural, horticultural, environmental and consulting services to residential, utility, commercial and government entities throughout the United States and Canada. We have two reportable operating segments organized by type or class of customer: Residential and Commercial, and Utility. Residential and Commercial --Residential and Commercial provides services to our residential and commercial customers including: the treatment, preservation, maintenance, removal and planting of trees, shrubs and other plant life; the practice of landscaping, grounds maintenance, tree surgery, tree feeding and tree spraying; the application of fertilizer, herbicides and insecticides; and, natural resource management and consulting, forestry research and development, and environmental planning. L. Operations by Business Segment (continued) Utility --Utility is principally engaged in providing services to our utility customers--investor-owned, municipal utilities, and rural electric cooperatives--including: the practice of line-clearing and vegetation management around power lines, rights-of-way and chemical brush control; and, natural resource management and consulting, forestry research and development, and environmental planning. All other operating activities, including research, technical support and laboratory diagnostic facilities, are included in “All Other.” Measurement of Segment Profit and Loss and Segment Assets -- We evaluate performance and allocate resources based primarily on operating income and also actively manage business unit operating assets. Segment information, including reconciling adjustments, is presented consistent with the basis described in our 2016 Annual Report. Segment information reconciled to consolidated external reporting information follows: L. Operations by Business Segment (continued) Utility Residential and Commercial All Other Reconciling Adjustments Consolidated Three Months Ended July 1, 2017 Revenues $ 112,903 $ 131,299 $ 835 $ — $ 245,037 Income (loss) from operations 4,270 23,837 (1,312 ) (1,483 ) (a) 25,312 Interest expense (1,072 ) (1,072 ) Interest income 73 73 Other income (expense), net (992 ) (992 ) Income before income taxes $ 23,321 Segment assets, total $ 171,472 $ 202,502 $ — $ 86,198 (b) $ 460,172 Three Months Ended July 2, 2016 Revenues $ 105,285 $ 118,945 $ 533 $ — $ 224,763 Income (loss) from operations 5,587 21,226 (980 ) (1,547 ) (a) 24,286 Interest expense (1,062 ) (1,062 ) Interest income 60 60 Other income (expense), net (1,156 ) (1,156 ) Income before income taxes $ 22,128 Segment assets, total $ 159,824 $ 181,945 $ — $ 84,375 (b) $ 426,144 Six Months Ended July 1, 2017 Revenues $ 225,381 $ 210,886 $ 1,583 $ — $ 437,850 Income (loss) from operations 6,928 20,255 (3,887 ) (2,326 ) (a) 20,970 Interest expense (2,329 ) (2,329 ) Interest income 143 143 Other income (expense), net (1,784 ) (1,784 ) Income before income taxes $ 17,000 Segment assets, total $ 171,472 $ 202,502 $ — $ 86,198 (b) $ 460,172 Six Months Ended July 2, 2016 Revenues $ 205,313 $ 199,279 $ 1,004 $ — $ 405,596 Income (loss) from operations 7,061 19,790 (4,086 ) (3,599 ) (a) 19,166 Interest expense (2,027 ) (2,027 ) Interest income 128 128 Other income (expense), net (1,755 ) (1,755 ) Income before income taxes $ 15,512 Segment assets, total $ 159,824 $ 181,945 $ — $ 84,375 (b) $ 426,144 Reconciling adjustments from segment reporting to consolidated external financial reporting include unallocated corporate items: (a) Reclassification of depreciation expense and allocation of corporate expenses. (b) Corporate assets include cash, prepaid expenses, corporate facilities, enterprise-wide information systems and other nonoperating assets.

Fair Value Measurements and Fin

Fair Value Measurements and Financial Instruments	6 Months Ended
	Jul. 01, 2017
Fair Value Disclosures [Abstract]
Fair value measurements and financial instruments	Fair Value Measurements and Financial Instruments Financial Accounting Standards Board Accounting Standard Codification 820, “Fair Value of Measurements and Disclosures (“Topic 820”)” defines fair value based on the price that would be received to sell an asset or the exit price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. Market participants are defined as buyers or sellers in the principal or most advantageous market for the asset or liability that are independent of the reporting entity, knowledgeable and able and willing to transact for the asset or liability. Valuation Hierarchy --Topic 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value. The hierarchy prioritizes the inputs into three broad levels: Level 1 inputs are quoted prices in active markets for identical assets or liabilities that the entity has the ability to access. Level 2 inputs are observable inputs other than prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated with observable market data. Level 3 inputs are unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs. Our assets and liabilities measured at fair value on a recurring basis at July 1, 2017 were as follows: Fair Value Measurements at July 1, 2017 Using: Assets and Liabilities Recorded at Total Carrying Value at July 1, 2017 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Assets invested for self-insurance, classified as other assets, noncurrent $ 16,933 $ 16,933 $ — $ — Liabilities: Deferred compensation $ 1,985 $ — $ 1,985 $ — M. Fair Value Measurements and Financial Instruments (continued) Our assets and liabilities measured at fair value on a recurring basis at December 31, 2016 were as follows: Fair Value Measurements at December 31, 2016 Using: Assets and Liabilities Recorded at Total Carrying Value at December 31, 2016 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Assets invested for self-insurance, classified as other assets, noncurrent $ 15,492 $ 15,492 $ — $ — Liabilities: Deferred compensation $ 1,837 $ — $ 1,837 $ — The assets invested for self-insurance are money market funds--classified as Level 1--based on quoted market prices of the identical underlying securities in active markets. The estimated fair value of the deferred compensation--classified as Level 2--is based on the value of the Company's common shares, determined by independent valuation. Fair Value of Financial Instruments --The fair values of our current financial assets and current liabilities, including cash, accounts receivable, accounts payable, and accrued expenses, among others, approximate their reported carrying values because of their short-term nature. Financial instruments classified as noncurrent liabilities and their carrying values and fair values were as follows: July 1, 2017 December 31, 2016 Carrying Value Fair Value Carrying Value Fair Value Revolving credit facility, noncurrent $ 102,500 $ 102,500 $ 67,000 $ 67,000 Senior unsecured notes 18,000 18,497 18,000 18,509 Term loans, noncurrent 9,060 11,270 7,623 9,854 Total $ 129,560 $ 132,267 $ 92,623 $ 95,363 The carrying value of our revolving credit facility approximates fair value--classified as Level 2--as the interest rates on the amounts outstanding are variable. The fair value of our senior unsecured notes and term loans--classified as Level 2--is determined based on expected future weighted-average interest rates with the same remaining maturities. Market Risk-- In the normal course of business, we are exposed to market risk related to changes in foreign currency exchange rates, changes in interest rates and changes in fuel prices. We do not hold or issue derivative financial instruments for trading or speculative purposes. In prior years, we have used derivative financial instruments to manage risk, in part, associated with changes in interest rates and changes in fuel prices. Presently, we are not engaged in any hedging or derivative activities.

Contingencies

Contingencies	6 Months Ended
	Jul. 01, 2017
Commitments and Contingencies Disclosure [Abstract]
Contingencies [Text Block]	Contingencies We are party to a number of lawsuits, threatened lawsuits and other claims arising out of the normal course of business. Management is of the opinion that liabilities which may result are adequately covered by insurance, or reflected in the self-insurance accruals, and would not be material in relation to the financial position or results of operations.

Basis of Financial Statement 21

Basis of Financial Statement Preparation (Policies)	6 Months Ended
	Jul. 01, 2017
Accounting Policies [Abstract]
Basis of financial statement preparation, policy [Policy Text Block]	The condensed consolidated financial statements present the financial position, results of operations and cash flows of The Davey Tree Expert Company and its subsidiaries. When we refer to “we,” “us,” “our,” “Davey,” or “Davey Tree”, we mean The Davey Tree Expert Company and its subsidiaries, unless otherwise expressly stated or the context indicates otherwise. We have prepared the accompanying unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”), as codified in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), and with the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. The consolidated financial statements include all adjustments which, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. All such adjustments are of a normal, recurring nature. All significant intercompany accounts and transactions have been eliminated. Certain information and disclosures required by U.S. GAAP for complete financial statements have been omitted in accordance with the rules and regulations of the SEC. We suggest that these condensed consolidated financial statements be read in conjunction with the financial statements included in our annual report on Form 10-K for the year ended December 31, 2016 (the “ 2016 Annual Report”).
Use of estimates, policy [Policy Text Block]	Use of Estimates in Financial Statement Preparation --The preparation of financial statements in accordance with U.S. GAAP requires the use of estimates and assumptions that affect reported amounts. Our consolidated financial statements include amounts that are based on management’s best estimates and judgments. Estimates are used for, but not limited to, accounts receivable valuation, depreciable lives of fixed assets, self-insurance accruals, income taxes and revenue recognition. Actual results could differ from those estimates.
Income tax, policy [Policy Text Block]	Our income tax provision for interim periods is determined using an estimate of our annual effective tax rate adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate and, if our estimated annual tax rate changes, we make a cumulative adjustment.
Earnings per share, policy [Policy Text Block]	We calculate our basic earnings per share by dividing net income or net loss by the weighted average number of common shares outstanding during the period. Diluted earnings per share are calculated in a similar manner, but include the effect of dilutive securities. To the extent these securities are antidilutive, they are excluded from the calculation of earnings per share.
Segment reporting, policy [Policy Text Block]	Measurement of Segment Profit and Loss and Segment Assets -- We evaluate performance and allocate resources based primarily on operating income and also actively manage business unit operating assets. Segment information, including reconciling adjustments, is presented consistent with the basis described in our 2016 Annual Report.

Accounts Receivable, Net and 22

Accounts Receivable, Net and Supplemental Balance-Sheet Information (Tables)	6 Months Ended
	Jul. 01, 2017
Accounts Receivable, Net and Supplemental Balance-Sheet Information [Abstract] [Abstract]
Accounts receivable, net [Table Text Block]	Accounts receivable, net, consisted of the following: Accounts receivable, net July 1, December 31, Accounts receivable $ 126,751 $ 128,202 Receivables under contractual arrangements 34,293 21,541 161,044 149,743 Less allowances for doubtful accounts 3,489 3,609 Accounts receivable, net $ 157,555 $ 146,134
Schedule of Other Current Assets [Table Text Block]	The following items comprise the amounts included in the balance sheets: Other current assets July 1, December 31, Refundable income taxes $ 94 $ 548 Prepaid expense 9,251 14,493 Other 299 1,315 Total $ 9,644 $ 16,356
Accrued expenses [Table Text Block]	Accrued expenses July 1, December 31, Employee compensation $ 14,189 $ 18,438 Accrued compensated absences 9,663 9,215 Self-insured medical claims 5,428 2,961 Income tax payable 3,744 953 Customer advances, deposits 756 2,997 Taxes, other than income 2,431 2,166 Other 1,411 929 Total $ 37,622 $ 37,659

Business Combinations Business

Business Combinations Business Combinations (Tables)	6 Months Ended
	Jul. 01, 2017
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The following table summarizes the preliminary purchase price allocation of the estimated fair values of the assets acquired and liabilities assumed: Six Months Ended July 1, 2017 Detail of acquisitions: Assets acquired: Cash $ 326 Receivables 1,759 Prepaid expense 128 Equipment 1,904 Deposits and other 129 Finite-lived intangibles 4,566 Goodwill 3,504 Liabilities assumed (1,439 ) Debt issued for purchases of businesses (3,099 ) Cash paid $ 7,778

Identified Intangible Assets 24

Identified Intangible Assets and Goodwill, Net (Tables)	6 Months Ended
	Jul. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of identified intangible assets and goodwill, net [Table Text Block]	The carrying amounts of the identified intangibles and goodwill acquired in connection with our historical investments in businesses were as follows: July 1, 2017 December 31, 2016 Identified Intangible Assets and Goodwill, Net Carrying Amount Accumulated Amortization Carrying Amount Accumulated Amortization Amortized intangible assets: Customer lists/relationships $ 21,711 $ 16,036 $ 17,822 $ 15,171 Employment-related 7,389 6,499 7,032 6,386 Tradenames 5,960 5,001 5,634 4,860 Amortized intangible assets $ 35,060 $ 27,536 $ 30,488 $ 26,417 Less accumulated amortization 27,536 26,417 Identified intangibles, net 7,524 4,071 Unamortized intangible assets: Goodwill 33,831 30,305 $ 41,355 $ 34,376
Schedule of Goodwill [Table Text Block]	The changes in the carrying amounts of goodwill, by segment, for the year ended December 31, 2017 follow: Balance at January 1, 2017 Acquisitions Translation and Other Adjustments Balance at July 1, 2017 Utility $ 3,424 $ — $ — $ 3,424 Residential and Commercial 26,881 3,504 22 30,407 Total $ 30,305 $ 3,504 $ 22 $ 33,831

Long-Term Debt and Commitment25

Long-Term Debt and Commitments Related to Letters of Credit (Tables)	6 Months Ended
	Jul. 01, 2017
Debt Disclosure [Abstract]
Schedule of long-term debt [Table Text Block]	Our long-term debt consisted of the following: July 1, December 31, Revolving credit facility Swing-line borrowings $ 7,500 $ 10,000 LIBOR borrowings 95,000 57,000 102,500 67,000 Senior unsecured notes 24,000 24,000 Term loans 10,252 16,151 Capital leases 2,620 2,343 139,372 109,494 Less debt issuance costs 263 333 Less current portion 9,813 16,871 $ 129,296 $ 92,290

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jul. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of stock-based compensation expense under all share-based payment plans [Table Text Block]	Stock-based compensation expense under all share-based payment plans -- our Employee Stock Purchase Plan, stock option plans, stock-settled stock appreciation rights and restricted stock units -- included in the results of operations follows: Three months ended Six Months Ended July 1, July 2, July 1, July 2, Compensation expense, all share-based payment plans $ 1,462 $ 678 $ 2,448 $ 1,324
Schedule of share-based compensation, stock-settled stock appreciation rights award activity [Table Text Block]	The following table summarizes our SSARs as of July 1, 2017 . Stock-Settled Stock Appreciation Rights Number Rights Weighted- Average Award Date Value Weighted- Life Unrecognized Cost Aggregate Value Unvested, January 1, 2017 743,662 $ 2.75 Granted 152,000 3.57 Forfeited — — Vested (240,546 ) 2.59 Unvested, July 1, 2017 655,116 $ 3.00 2.7 years $ 1,301 $ 11,530 Employee SSARs 655,116 $ 3.00 2.7 years $ 1,301 $ 11,530
Schedule of share-based compensation, performance-based restricted stock units award activity [Table Text Block]	The following table summarizes restricted stock units as of July 1, 2017 . Restricted Stock Units Number Units Weighted- Average Grant Date Value Weighted- Average Remaining Contractual Life Unrecognized Cost Aggregate Intrinsic Value Unvested, January 1, 2017 304,958 $ 13.22 Granted 80,350 17.01 Forfeited — — Vested (49,964 ) 11.38 Unvested, July 1, 2017 335,344 $ 14.40 2.8 years $ 2,604 $ 5,902
Schedule of share-based payment award, stock options, valuation assumptions [Table Text Block]	The fair values of stock-based awards granted were estimated at the dates of grant with the following weighted-average assumption. Six Months Ended July 1, July 2, Volatility rate 10.3 % 10.6 % Risk-free interest rate 2.2 % 1.8 % Expected dividend yield .7 % .7 % Expected life of awards (years) 8.9 9.5
Schedule of share-based compensation, stock options activity [Table Text Block]	The following table summarizes activity under the stock option plans for the six months ended July 1, 2017 . Stock Options Number Outstanding Weighted- Price Weighted- Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding, January 1, 2017 1,599,296 $ 12.49 Granted 148,500 17.60 Exercised (74,420 ) 10.40 Forfeited (64,574 ) 12.75 Outstanding, July 1, 2017 1,608,802 $ 13.05 6.7 years $ 7,320 Exercisable, July 1, 2017 869,302 $ 11.23 5.4 years $ 5,537

Net Periodic Benefit Expense 27

Net Periodic Benefit Expense - Defined Benefit Pension Plans (Tables)	6 Months Ended
	Jul. 01, 2017
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Schedule of defined benefit pension plans, components of pension expense [Table Text Block]	The results of operations included the following net periodic benefit expense (income) recognized related to our defined-benefit pension plans. Three Months Ended Six Months Ended July 1, July 2, July 1, July 2, Components of pension expense (income) Service costs--increase in benefit obligation earned $ 132 $ 90 $ 265 $ 190 Interest cost on projected benefit obligation 264 310 527 627 Expected return on plan assets (170 ) (276 ) (339 ) (553 ) Settlement loss — — — 453 Amortization of net actuarial loss 238 237 475 480 Amortization of prior service cost 15 — 31 — Net pension expense of defined benefit pension plans $ 479 $ 361 $ 959 $ 1,197

Accumulated Other Comprehensi28

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jul. 01, 2017
Equity [Abstract]
Schedule of other comprehensive income (loss) [Table Text Block]	The following summarizes the components of other comprehensive income (loss) accumulated in shareholders’ equity for the six months ended July 1, 2017 and six months ended July 2, 2016 : Foreign Currency Translation Adjustments Defined Benefit Pension Plans Accumulated Other Comprehensive Income (Loss) Balance at January 1, 2017 $ (5,500 ) $ (6,662 ) $ (12,162 ) Other comprehensive income (loss) before reclassifications Unrealized gains $ 1,203 $ — $ 1,203 Amounts reclassified from accumulated other comprehensive income (loss) — 506 506 Tax effect — (192 ) (192 ) Net of tax amount 1,203 314 1,517 Balance at July 1, 2017 $ (4,297 ) $ (6,348 ) $ (10,645 ) Foreign Currency Translation Adjustments Defined Benefit Pension Plans Accumulated Other Comprehensive Income (Loss) Balance at January 1, 2016 $ (6,244 ) $ (7,150 ) $ (13,394 ) Other comprehensive income (loss) before reclassifications Unrealized gains $ 1,997 $ — $ 1,997 Amounts reclassified from accumulated other comprehensive income (loss) — 829 829 Tax effect — (321 ) (321 ) Net of tax amount 1,997 508 2,505 Balance at July 2, 2016 $ (4,247 ) $ (6,642 ) $ (10,889 )

Per Share Amounts and Common 29

Per Share Amounts and Common Shares Outstanding (Tables)	6 Months Ended
	Jul. 01, 2017
Equity [Abstract]
Schedule of earnings per share, basic and diluted [Table Text Block]	The per share amounts were computed as follows (adjusted for the two -for-one stock split of our common shares effective June 1, 2017): Three Months Ended Six Months Ended July 1, July 2, July 1, July 2, Income available to common shareholders: Net income $ 14,223 $ 13,309 $ 10,336 $ 9,121 Weighted-average shares: Basic: Outstanding 24,797 25,528 24,582 25,534 Partially-paid share subscriptions 201 212 402 424 Basic weighted-average shares 24,998 25,740 24,984 25,958 Diluted: Basic from above 24,998 25,740 24,984 25,958 Incremental shares from assumed: Exercise of stock subscription purchase rights 141 136 143 136 Exercise of stock options and awards 846 822 871 874 Diluted weighted-average shares 25,985 26,698 25,998 26,968 Net income per share: Basic $ .57 $ .52 $ .41 $ .35 Diluted $ .55 $ .50 $ .40 $ .34
Schedule of common shares outstanding [Table Text Block]	A summary of the activity of the common shares outstanding for the six months ended July 1, 2017 follows: Shares outstanding at January 1, 2017 24,923,140 Shares purchased (942,035 ) Shares sold 449,298 Stock subscription offering -- cash purchases 41,781 Options and awards exercised 105,819 (345,137 ) Shares outstanding at July 1, 2017 24,578,003

Operations by Business Segment

Operations by Business Segment (Tables)	6 Months Ended
	Jul. 01, 2017
Segment Reporting [Abstract]
Schedule of segment reporting information, by segment [Table Text Block]	Segment information reconciled to consolidated external reporting information follows: L. Operations by Business Segment (continued) Utility Residential and Commercial All Other Reconciling Adjustments Consolidated Three Months Ended July 1, 2017 Revenues $ 112,903 $ 131,299 $ 835 $ — $ 245,037 Income (loss) from operations 4,270 23,837 (1,312 ) (1,483 ) (a) 25,312 Interest expense (1,072 ) (1,072 ) Interest income 73 73 Other income (expense), net (992 ) (992 ) Income before income taxes $ 23,321 Segment assets, total $ 171,472 $ 202,502 $ — $ 86,198 (b) $ 460,172 Three Months Ended July 2, 2016 Revenues $ 105,285 $ 118,945 $ 533 $ — $ 224,763 Income (loss) from operations 5,587 21,226 (980 ) (1,547 ) (a) 24,286 Interest expense (1,062 ) (1,062 ) Interest income 60 60 Other income (expense), net (1,156 ) (1,156 ) Income before income taxes $ 22,128 Segment assets, total $ 159,824 $ 181,945 $ — $ 84,375 (b) $ 426,144 Six Months Ended July 1, 2017 Revenues $ 225,381 $ 210,886 $ 1,583 $ — $ 437,850 Income (loss) from operations 6,928 20,255 (3,887 ) (2,326 ) (a) 20,970 Interest expense (2,329 ) (2,329 ) Interest income 143 143 Other income (expense), net (1,784 ) (1,784 ) Income before income taxes $ 17,000 Segment assets, total $ 171,472 $ 202,502 $ — $ 86,198 (b) $ 460,172 Six Months Ended July 2, 2016 Revenues $ 205,313 $ 199,279 $ 1,004 $ — $ 405,596 Income (loss) from operations 7,061 19,790 (4,086 ) (3,599 ) (a) 19,166 Interest expense (2,027 ) (2,027 ) Interest income 128 128 Other income (expense), net (1,755 ) (1,755 ) Income before income taxes $ 15,512 Segment assets, total $ 159,824 $ 181,945 $ — $ 84,375 (b) $ 426,144 Reconciling adjustments from segment reporting to consolidated external financial reporting include unallocated corporate items: (a) Reclassification of depreciation expense and allocation of corporate expenses. (b) Corporate assets include cash, prepaid expenses, corporate facilities, enterprise-wide information systems and other nonoperating assets.

Fair Value Measurements and F31

Fair Value Measurements and Financial Instruments (Tables)	6 Months Ended
	Jul. 01, 2017
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on a recurring basis [Table Text Block]	Our assets and liabilities measured at fair value on a recurring basis at July 1, 2017 were as follows: Fair Value Measurements at July 1, 2017 Using: Assets and Liabilities Recorded at Total Carrying Value at July 1, 2017 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Assets invested for self-insurance, classified as other assets, noncurrent $ 16,933 $ 16,933 $ — $ — Liabilities: Deferred compensation $ 1,985 $ — $ 1,985 $ — M. Fair Value Measurements and Financial Instruments (continued) Our assets and liabilities measured at fair value on a recurring basis at December 31, 2016 were as follows: Fair Value Measurements at December 31, 2016 Using: Assets and Liabilities Recorded at Total Carrying Value at December 31, 2016 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Assets invested for self-insurance, classified as other assets, noncurrent $ 15,492 $ 15,492 $ — $ — Liabilities: Deferred compensation $ 1,837 $ — $ 1,837 $ —
Financial instruments recorded at historical carrying value [Table Text Block]	Financial instruments classified as noncurrent liabilities and their carrying values and fair values were as follows: July 1, 2017 December 31, 2016 Carrying Value Fair Value Carrying Value Fair Value Revolving credit facility, noncurrent $ 102,500 $ 102,500 $ 67,000 $ 67,000 Senior unsecured notes 18,000 18,497 18,000 18,509 Term loans, noncurrent 9,060 11,270 7,623 9,854 Total $ 129,560 $ 132,267 $ 92,623 $ 95,363

Basis of Financial Statement 32

Basis of Financial Statement Preparation Recent accounting guidance (Details) $ in Thousands	Apr. 01, 2017USD ($)
Accounting Standards Update 2016 09 [Member] | Additional paid-in capital [Member]
New accounting pronouncement or change in accounting principle, cumulative effect of change on equity or net assets	$ (162)

Basis of Financial Statement 33

Basis of Financial Statement Preparation Details (Details)	6 Months Ended
	Jul. 01, 2017
Accounting Policies [Abstract]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2

Accounts Receivable, Net and 34

Accounts Receivable, Net and Supplemental Balance-Sheet Information (Details) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Accounts receivable, net
Accounts receivable	$ 126,751	$ 128,202
Receivables under contractual arrangements	34,293	21,541
Accounts receivable, gross	161,044	149,743
Less allowances for doubtful accounts	3,489	3,609
Accounts receivable, net	157,555	146,134
Other current assets
Refundable income taxes	94	548
Prepaid expense	9,251	14,493
Other	299	1,315
Total	9,644	16,356
Accrued expenses
Employee compensation	14,189	18,438
Accrued compensated absences	9,663	9,215
Self-insured medical claims	5,428	2,961
Income tax payable	3,744	953
Customer advances, deposits	756	2,997
Taxes, other than income	2,431	2,166
Other	1,411	929
Total	37,622	37,659
Other current liabilities
Long-term debt	9,813	16,871
Total	$ 33,071	$ 39,963

Business Combinations (Details)

Business Combinations (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Feb. 28, 2017
Investment in businesses	$ 10,877,000	$ 4,170,000
Liabilities assumed	1,439,000	98,000
Debt issued	3,099,000	$ 575,000
Cash paid	7,778,000
Cash	326,000
Receivables	1,759,000
Prepaid expense	128,000
Equipment	1,904,000
Deposits and other	129,000
Finite-lived intangibles	4,566,000
Goodwill	3,504,000
Arborguard Tree Specialists Inc. [Member]
Liabilities assumed	1,416,000
Debt issued	2,724,000
Cash paid	7,200,000
Revenue reported by acquired entity for last annual period			$ 10,711,000
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Including Goodwill	$ 3,104,000

Identified Intangible Assets 36

Identified Intangible Assets and Goodwill, Net (Details) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	$ 35,060	$ 30,488
Accumulated amortization	27,536	26,417
Identified intangible assets, net	7,524	4,071
Identified intangible assets and goodwill, net	41,355	34,376
Customer lists/relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	21,711	17,822
Accumulated amortization	16,036	15,171
Employment-related [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	7,389	7,032
Accumulated amortization	6,499	6,386
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	5,960	5,634
Accumulated amortization	$ 5,001	$ 4,860

Identified Intangible Assets 37

Identified Intangible Assets and Goodwill, Net Schedule of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill	$ 33,831	$ 30,305
Goodwill, acquisitions	3,504
Goodwill, translation and other adjustments	22
Utility services [Member]
Goodwill [Line Items]
Goodwill	3,424	3,424
Goodwill, acquisitions	0
Goodwill, translation and other adjustments	0
Residential commercial services [Member]
Goodwill [Line Items]
Goodwill	30,407	$ 26,881
Goodwill, acquisitions	3,504
Goodwill, translation and other adjustments	$ 22

Long-Term Debt and Commitment38

Long-Term Debt and Commitments Related to Letters of Credit Long-Term Debt (Details) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Revolving credit facility, noncurrent	$ 102,500	$ 67,000
Senior unsecured notes	24,000	24,000
Term loans	10,252	16,151
Capital leases	2,620	2,343
Long-term debt	139,372	109,494
Less debt issuance costs	263	333
Less current portion	9,813	16,871
Long-term debt, excluding current maturities	129,296	92,290
Swing-line borrowings [Member]
Revolving credit facility, noncurrent	7,500	10,000
London Interbank Offered Rate (LIBOR) [Member]
Revolving credit facility, noncurrent	$ 95,000	$ 57,000

Long-Term Debt and Commitment39

Long-Term Debt and Commitments Related to Letters of Credit (Narrative) (Details) $ in Thousands	6 Months Ended
	Jul. 01, 2017USD ($)	May 07, 2017USD ($)	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Revolving credit facility, current borrowing capacity	$ 175,000
Revolving credit facility, maximum borrowing capacity	210,000
Unused commitments under credit facility	68,429
Revolving credit facility borrowings	$ 102,500		$ 67,000
Number of principal payments	5
Anniversary when principal payments begin	6
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.10%
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.25%
Swing-line borrowings [Member]
Debt Instrument [Line Items]
Revolving credit facility, current borrowing capacity	$ 15,000
Revolving credit facility borrowings	$ 7,500		10,000
Unsecured debt [Member]
Debt Instrument [Line Items]
Interest rate	5.09%
Accounts receivable securitization [Member]
Debt Instrument [Line Items]
Interest rate	0.90%
Unused commitment fee threshold percent	0.50
Debt instrument variable rate base rate calculation, default rate	2.00%
Accounts receivable securitization [Member] | Base Rate, Federal Funds [Member]
Debt Instrument [Line Items]
Debt instrument, variable rate, base rate calculation	0.50%
Line of credit [Member]
Debt Instrument [Line Items]
Revolving credit facility borrowings	$ 106,571
Line of credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, variable rate, base rate calculation	1.50%
Line of credit [Member] | Base Rate, Federal Funds [Member]
Debt Instrument [Line Items]
Debt instrument, variable rate, base rate calculation	0.50%
Line of credit [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Outstanding borrowings interest rate margin adjustment, range	0.75%
Line of credit [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Outstanding borrowings interest rate margin adjustment, range	1.50%
Letter of credit [Member]
Debt Instrument [Line Items]
Letters of credit issued	$ 64,221		64,225
Letter of credit [Member] | Revolving credit facility [Member]
Debt Instrument [Line Items]
Letters of credit issued	4,071		4,071
Letter of credit [Member] | Accounts receivable securitization [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity	100,000	$ 60,000
Letters of credit issued	$ 58,150		58,150
Debt Instrument, Term	1 year
Letter of credit [Member] | Accounts receivable securitization [Member] | Minimum [Member]
Debt Instrument [Line Items]
Letter of credit, unused capacity, commitment fee percentage	0.0035
Letter of credit [Member] | Accounts receivable securitization [Member] | Maximum [Member]
Debt Instrument [Line Items]
Letter of credit, unused capacity, commitment fee percentage	0.0045
Letter of credit [Member] | Line of credit [Member]
Debt Instrument [Line Items]
Letters of credit issued	$ 2,000		$ 2,004
Letter of credit [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 100,000

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, percentage of outstanding stock maximum				5.00%
Share-based compensation arrangement by share-based payment award, percentage of outstanding and available for grant, maximum				10.00%
Compensation expense, share-based payment plans		$ 1,462	$ 678	$ 2,448	$ 1,324
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Volatility rate				10.30%	10.60%
Risk-free interest rate				2.20%	1.80%
Expected dividend yield				0.70%	0.70%
Expected life of awards (years)				8 years 10 months 24 days	9 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance	[1]			1,599,296
Granted	[1]			148,500
Exercised	[1]			(74,420)
Forfeited	[1]			(64,574)
Outstanding, ending balance	[1]	1,608,802		1,608,802
Exercisable, ending balance	[1]	869,302		869,302
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average exercise price, beginning balance	[1]			$ 12.49
Granted, weighted average exercise price	[1]			17.6
Exercised, weighted average exercise price	[1]			10.40
Forfeited, weighted average exercise price	[1]			12.75
Outstanding, weighted average exercise price, ending balance	[1]	$ 13.05		13.05
Exercisable, weighted average exercise price, ending balance	[1]	$ 11.23		$ 11.23
Exercisable, weighted average remaining contractual life (years)				5 years 4 months 24 days
Outstanding, aggregate intrinsic value		$ 7,320		$ 7,320
Exercisable, aggregate intrinsic value		5,537		5,537
Outstanding, unrecognized compensation cost		$ 1,438		$ 1,438
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition				2 years 3 months 18 days
Employee stock purchase plan [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans				$ 415	$ 337
Employee stock purchase plan, service period				1 year
Employee stock purchase plan, percentage of market price, purchase date				85.00%
Employee stock purchase plan, discount from market price, purchase date				15.00%
Stock option plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans				$ 395	270
Stock options awarded, term (years)				10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual life (years)				6 years 8 months 12 days
Stock-settled stock appreciation rights (SSARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans				$ 757	292
Share-based compensation arrangement by share-based payment award, award vesting period				5 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested, beginning balance	[1]			743,662
Granted	[1]			152,000
Forfeited	[1]			0
Vested	[1]			(240,546)
Unvested, ending balance	[1]	655,116		655,116
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested, weighted average award date value, beginning balance	[1]			$ 2.75
Granted, weighted average award date value	[1]			3.57
Forfeited, weighted average award date value	[1]			0
Vested, weighted average award date value	[1]			2.59
Unvested, weighted average award date value, ending balance	[1]	$ 3		$ 3
Weighted average remaining contractual life (years)				2 years 8 months 12 days
Unrecognized compensation cost		$ 1,301		$ 1,301
Aggregate intrinsic value		$ 11,530		$ 11,530
Employee SSARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested, ending balance	[1]	655,116		655,116
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested, weighted average award date value, ending balance	[1]	$ 3		$ 3
Weighted average remaining contractual life (years)				2 years 8 months 12 days
Unrecognized compensation cost		$ 1,301		$ 1,301
Aggregate intrinsic value		$ 11,530		11,530
Restricted stock units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense, share-based payment plans				$ 881	$ 425
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested, beginning balance	[1]			304,958
Granted	[1]			80,350
Forfeited	[1]			0
Vested	[1]			(49,964)
Unvested, ending balance	[1]	335,344		335,344
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested, weighted average award date value, beginning balance	[1]			$ 13.22
Granted, weighted average award date value	[1]			17.01
Forfeited, weighted average award date value	[1]			0
Vested, weighted average award date value	[1]			11.38
Unvested, weighted average award date value, ending balance	[1]	$ 14.40		$ 14.40
Weighted average remaining contractual life (years)				2 years 9 months 18 days
Unrecognized compensation cost		$ 2,604		$ 2,604
Aggregate intrinsic value		$ 5,902		$ 5,902
[1]	Adjusted for two-for-one stock split

Net Periodic Benefit Expense 41

Net Periodic Benefit Expense - Defined Benefit Pension Plans (Details) - Pension plans, defined benefit [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Defined Benefit Plan Disclosure [Line Items]
Service costs--increase in benefit obligation earned	$ 132	$ 90	$ 265	$ 190
Interest cost on projected benefit obligation	264	310	527	627
Expected return on plan assets	(170)	(276)	(339)	(553)
Settlement loss	0	0	0	453
Amortization of net actuarial loss	238	237	475	480
Amortization of prior service cost	15	0	31	0
Net pension expense of defined benefit pension plans	$ 479	$ 361	$ 959	$ 1,197

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate	39.20%	41.20%
Unrecognized tax benefits	$ 2,532		$ 2,532
Unrecognized tax benefits that would impact effective tax rate	2,053		2,053
Unrecognized tax benefits, interest on income taxes accrued	$ 107		$ 107

Accumulated Other Comprehensi43

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Accumulated other comprehensive income (loss) [Roll Forward]
Beginning balance			$ (12,162)	$ (13,394)
Unrealized gains	$ 881	$ 245	1,203	1,997
Amounts reclassified from accumulated other comprehensive income (loss)			506	829
Tax effect			(192)	(321)
Net of tax amount			1,517	2,505
Ending balance	(10,645)	(10,889)	(10,645)	(10,889)
Foreign currency translation adjustments [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Beginning balance			(5,500)	(6,244)
Unrealized gains			1,203	1,997
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Tax effect			0	0
Net of tax amount			1,203	1,997
Ending balance	(4,297)	(4,247)	(4,297)	(4,247)
Defined benefit pension plans [member]
Accumulated other comprehensive income (loss) [Roll Forward]
Beginning balance			(6,662)	(7,150)
Unrealized gains			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			506	829
Tax effect			(192)	(321)
Net of tax amount			314	508
Ending balance	$ (6,348)	$ (6,642)	$ (6,348)	$ (6,642)

Per Share Amounts and Common 44

Per Share Amounts and Common Shares Outstanding (Details) $ / shares in Units, $ in Thousands		Jun. 15, 2017USD ($)	Jul. 01, 2017USD ($)$ / sharesshares	Jul. 02, 2016USD ($)$ / sharesshares	Jul. 01, 2017USD ($)$ / sharesshares	Jul. 02, 2016USD ($)$ / sharesshares	Dec. 31, 2016$ / shares
Equity [Abstract]
Stockholders' Equity Note, Stock Split, Conversion Ratio					2
Net income | $			$ 14,223	$ 13,309	$ 10,336	$ 9,121
Weighted-average shares outstanding, basic	[1]		24,797,000	25,528,000	24,582,000	25,534,000
Weighted-average shares, partially-paid share subscriptions	[1]		201,000	212,000	402,000	424,000
Basic weighted average shares	[1]		24,998,000	25,740,000	24,984,000	25,958,000
Incremental shares from assumed exercise of stock subscription purchase rights	[1]		141,000	136,000	143,000	136,000
Incremental shares from assumed exercise of stock options and awards	[1]		846,000	822,000	871,000	874,000
Diluted weighted-average shares	[1]		25,985,000	26,698,000	25,998,000	26,968,000
Net income per share basic | $ / shares	[1]		$ 0.57	$ 0.52	$ 0.41	$ 0.35
Net income per share diluted | $ / shares	[1]		$ 0.55	$ 0.50	$ 0.40	$ 0.34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares outstanding at January 1, 2017	[1]				24,923,140
Shares purchased	[1]				(942,035)
Shares sold	[1]				449,298
Stock subscription offering -- cash purchases	[1]				41,781
Options and awards exercised	[1]				105,819
Change in shares outstanding	[1]				(345,137)
Shares outstanding at July 1, 2017	[1]		24,578,003		24,578,003
Employee and director options exercisable	[1]		869,302		869,302
Partially-paid subscriptions	[1]		804,048		804,048
Purchase rights outstanding	[1]		319,956		319,956
Common stock, par value | $ / shares			$ 1		$ 1		$ 1
Adjustments to Additional Paid in Capital, Stock Split | $		$ 21,457
Dividends, common stock, stock per share | $ / shares					$ 1
[1]	Adjusted for two-for-one stock split

Per Share Amounts and Common 45

Per Share Amounts and Common Shares Outstanding Stock subscription (Details)	6 Months Ended
	Jul. 01, 2017USD ($)$ / sharesshares
Equity [Abstract]
Stock subscription offering, subscription price | $ / shares	$ 9.85	[1]
Stock subscription offering, number of shares subscribed | shares	1,275,428	[1]
stock subscription offering, value of shares subscribed | $	$ 12,563,000
Stock subscription offering, minimum financed amount | $	$ 5,000
Stock subscription offering, down payment	10.00%
Stock subscription offering, term (in years)	7 years
Stock subscription offering, interest rate	2.00%
Stock subscription offering, minimum amount to receive right | $	$ 5,000
Stock subscription offering, number of shares purchased to receive one right | shares	3
Stock subscription offering, number of rights issued | shares	423,600	[1]
Stock subscription offering, portion exercisable per year	14.29%
Stock subscription offering, right expiration term (in years)	7 years
[1]	Adjusted for two-for-one stock split

Operations by Business Segmen46

Operations by Business Segment (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 01, 2017USD ($)	Jul. 02, 2016USD ($)	Jul. 01, 2017USD ($)	Jul. 02, 2016USD ($)	Dec. 31, 2016USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments				2
Revenues		$ 245,037	$ 224,763	$ 437,850	$ 405,596
Income (loss) from operations		25,312	24,286	20,970	19,166
Interest expense		(1,072)	(1,062)	(2,329)	(2,027)
Interest income		73	60	143	128
Other income (expense), net		(992)	(1,156)	(1,784)	(1,755)
Income before income taxes		23,321	22,128	17,000	15,512
Segment assets, total		460,172	426,144	460,172	426,144	$ 423,939
Utility services [Member]
Segment Reporting Information [Line Items]
Revenues		112,903	105,285	225,381	205,313
Income (loss) from operations		4,270	5,587	6,928	7,061
Segment assets, total		171,472	159,824	171,472	159,824
Residential commercial services [Member]
Segment Reporting Information [Line Items]
Revenues		131,299	118,945	210,886	199,279
Income (loss) from operations		23,837	21,226	20,255	19,790
Segment assets, total		202,502	181,945	202,502	181,945
All other [Member]
Segment Reporting Information [Line Items]
Revenues		835	533	1,583	1,004
Income (loss) from operations		(1,312)	(980)	(3,887)	(4,086)
Segment assets, total		0	0	0	0
Reconciling adjustments [Member]
Segment Reporting Information [Line Items]
Revenues		0	0	0	0
Income (loss) from operations	[1]	(1,483)	(1,547)	(2,326)	(3,599)
Interest expense		(1,072)	(1,062)	(2,329)	(2,027)
Interest income		73	60	143	128
Other income (expense), net		(992)	(1,156)	(1,784)	(1,755)
Segment assets, total	[2]	$ 86,198	$ 84,375	$ 86,198	$ 84,375
[1]	(a)Reclassification of depreciation expense and allocation of corporate expenses.
[2]	(b)Corporate assets include cash, prepaid expenses, corporate facilities, enterprise-wide information systems and other nonoperating assets.

Fair Value Measurements and F47

Fair Value Measurements and Financial Instruments (Details) - Fair value, measurements, recurring [Member] - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Quoted prices in active markets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	$ 16,933	$ 15,492
Deferred compensation	0	0
Significant other observable inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	0	0
Deferred compensation	1,985	1,837
Significant unobservable inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	0	0
Deferred compensation	0	0
Total carrying value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	16,933	15,492
Deferred compensation	$ 1,985	$ 1,837

Fair Value Measurements and F48

Fair Value Measurements and Financial Instruments Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Liabilities, fair value disclosure [Abstract]
Revolving credit facility, noncurrent	$ 102,500	$ 67,000
Senior unsecured notes	24,000	24,000
Carrying value [Member]
Liabilities, fair value disclosure [Abstract]
Revolving credit facility, noncurrent	102,500	67,000
Senior unsecured notes	18,000	18,000
Term loans, noncurrent	9,060	7,623
Total	129,560	92,623
Fair value [Member]
Liabilities, fair value disclosure [Abstract]
Revolving credit facility, noncurrent	102,500	67,000
Senior unsecured notes	18,497	18,509
Term loans, noncurrent	11,270	9,854
Total	$ 132,267	$ 95,363