Astec Industries (ASTE) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 27, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	ASTEC INDUSTRIES INC
Entity Central Index Key	792,987
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		23,093,602
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 65,206	$ 62,280
Investments	1,972	1,624
Trade receivables	140,876	114,786
Other receivables	3,329	5,166
Inventories	394,789	391,379
Prepaid expenses and other	36,044	27,734
Total current assets	642,216	602,969
Property and equipment, net	185,455	190,396
Investments	15,024	14,553
Goodwill	45,341	45,732
Other long-term assets	35,800	35,929
Total assets	923,836	889,579
Current liabilities:
Current maturities of long-term debt	1,312	2,469
Accounts payable	64,702	60,417
Customer deposits	45,218	49,381
Accrued product warranty	11,544	15,410
Accrued payroll and related liabilities	21,444	23,297
Accrued loss reserves	2,103	2,504
Accrued pellet plant agreement costs	68,000	0
Other current liabilities	28,357	25,668
Total current liabilities	242,680	179,146
Long-term debt	1,062	1,575
Deferred income tax liabilities	1,331	1,509
Other long-term liabilities	21,782	20,584
Total liabilities	266,855	202,814
Shareholders' equity	656,140	685,672
Non-controlling interest	841	1,093
Total equity	656,981	686,765
Total liabilities and equity	$ 923,836	$ 889,579

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Operations (unaudited) [Abstract]
Net sales	$ 272,528	$ 301,909	$ 597,981	$ 620,310
Cost of sales	271,420	236,385	518,868	479,014
Gross profit	1,108	65,524	79,113	141,296
Selling, general, administrative and engineering expenses	51,263	44,220	103,341	97,342
Income (loss) from operations	(50,155)	21,304	(24,228)	43,954
Interest expense	168	185	318	450
Other income, net of expenses	1,052	261	1,513	773
Income (loss) from operations before income taxes	(49,271)	21,380	(23,033)	44,277
Income tax provision (benefit)	(8,503)	7,021	(2,481)	14,838
Net income (loss)	(40,768)	14,359	(20,552)	29,439
Net loss attributable to non-controlling interest	(94)	(61)	(145)	(101)
Net income (loss) attributable to controlling interest	$ (40,674)	$ 14,420	$ (20,407)	$ 29,540
Net income (loss) attributable to controlling interest:
Basic (in dollars per share)	$ (1.76)	$ 0.63	$ (0.89)	$ 1.28
Diluted (in dollars per share)	$ (1.76)	$ 0.62	$ (0.89)	$ 1.27
Weighted average number of common shares outstanding:
Basic (in shares)	23,061	23,026	23,053	23,020
Diluted (in shares)	23,061	23,183	23,053	23,179
Dividends declared per common share (in dollars per share)	$ 0.10	$ 0.10	$ 0.20	$ 0.20

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) [Abstract]
Net income (loss)	$ (40,768)	$ 14,359	$ (20,552)	$ 29,439
Other comprehensive income (loss):
Foreign currency translation adjustments	(8,021)	1,530	(6,309)	3,560
Change in unrecognized pension benefit cost	0	0	65	0
Other comprehensive income (loss)	(8,021)	1,530	(6,244)	3,560
Comprehensive income (loss)	(48,789)	15,889	(26,796)	32,999
Comprehensive loss attributable to non-controlling interest	(237)	(132)	(285)	(124)
Comprehensive income (loss) attributable to controlling interest	$ (48,552)	$ 16,021	$ (26,511)	$ 33,123

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ (20,552)	$ 29,439
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation and amortization	13,880	12,777
Provision for doubtful accounts	148	89
Provision for warranties	7,529	8,248
Deferred compensation provision (benefit)	99	(758)
Stock-based compensation	1,321	1,814
Deferred income tax benefit	(121)	(245)
Gain on disposition of fixed assets	(183)	(197)
Distributions to SERP participants	(184)	(123)
Change in operating assets and liabilities:
Sale (purchase) of trading securities, net	(336)	(55)
Trade and other receivables	(24,219)	(38,551)
Inventories	(3,410)	(20,919)
Prepaid expenses	2,278	3,502
Other assets	(3,639)	(186)
Accounts payable	4,181	7,662
Accrued pellet plant agreement costs	68,000	0
Accrued product warranty	(11,482)	(7,184)
Customer deposits	(4,163)	6,813
Prepaid and income taxes payable, net	(9,141)	(7,847)
Other	(1,585)	(3,331)
Net cash provided (used) by operating activities	18,421	(9,052)
Cash flows from investing activities:
Expenditures for property and equipment	(8,719)	(10,846)
Proceeds from sale of property and equipment	243	211
Other	95	(561)
Net cash used by investing activities	(8,381)	(11,196)
Cash flows from financing activities:
Payment of dividends	(4,618)	(4,613)
Repayments of bank loans	(1,105)	(5,929)
Sale of Company shares held by SERP	279	159
Withholding tax paid upon vesting of restricted stock units	(432)	(501)
Purchase of subsidiary shares	(27)	(31)
Net cash used by financing activities	(5,903)	(10,915)
Effect of exchange rates on cash	(1,211)	899
Net change in cash and cash equivalents	2,926	(30,264)
Cash and cash equivalents, beginning of period	62,280	82,371
Cash and cash equivalents, end of period	$ 65,206	$ 52,107

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Equity (unaudited) - 6 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in-Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Company Shares Held by SERP [Member]	Retained Earnings [Member]	Non-controlling Interest [Member]	Total
Balance at Dec. 31, 2017	$ 4,614	$ 141,931	$ (24,243)	$ (1,960)	$ 565,330	$ 1,093	$ 686,765
Balance (in shares) at Dec. 31, 2017	23,070
Net income (loss)	$ 0	0	0	0	(20,407)	(145)	(20,552)
Other comprehensive loss	0	0	(6,244)	0	0	(140)	(6,384)
Change in ownership percentage of subsidiary	0	0	0	0	0	(109)	(109)
Dividends declared	0	5	0	0	(4,623)	0	(4,618)
Stock-based compensation	0	1,890	0	0	0	0	1,890
Stock issued under incentive plans	$ 5	(5)	0	0	0	0	0
Stock issued under incentive plans (in shares)	24
Withholding tax paid upon vesting of RSUs	$ 0	(432)	0	0	0	0	(432)
SERP transactions, net	0	207	0	72	0	0	279
Other	0	0	0	0	0	142	142
Balance at Jun. 30, 2018	$ 4,619	$ 143,596	$ (30,487)	$ (1,888)	$ 540,300	$ 841	$ 656,981
Balance (in shares) at Jun. 30, 2018	23,094

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Significant Accounting Policies [Abstract]
Significant Accounting Policies	Note 1. Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X promulgated under the Securities Exchange Act of 1934. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the six-month period ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. It is suggested that these unaudited condensed consolidated financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Astec Industries, Inc. Annual Report on Form 10-K for the year ended December 31, 2017. The unaudited condensed consolidated balance sheet as of December 31, 2017 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. Dollar and share amounts shown are in thousands, except per share amounts, unless otherwise specified. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, "Revenue from Contracts with Customers", which supersedes existing revenue guidance under U.S. GAAP. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Certain provisions of the standard were clarified in March 2016 with the issuance of ASU No. 2016-08, "Revenue from Contracts with Customers (Topic 606)", which provided additional implementation guidance in order to eliminate the potential for diversity in practice arising from inconsistent application of the principal versus agent guidance. Under the new guidance, when an entity determines it is a principal in a transaction, the entity recognizes revenue in the gross amount of consideration; however, in transactions where an entity determines it is an agent, the entity recognizes revenue in the amount of any fee or commission to which it expects to be entitled. These new standards require companies to use more judgment and to make more estimates than under previous guidance and expand required disclosures to include information regarding contract assets and liabilities as well as a more disaggregated view of revenue. The standards are effective for public companies for annual periods beginning after December 15, 2017 and, as such, the Company adopted the new standards effective January 1, 2018 using the modified retrospective transition method. See Note 11, Revenue Recognition, for additional disclosures required by the standards. The adoption of the standards did not have a material impact on the Company's financial position, results of operations or cash flows, and no cumulative effect adjustment to retained earnings was necessitated. In January 2016, the FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10)", which requires, among other things, equity investments with readily determinable fair values, except those accounted for under the equity method of accounting or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. The new standard was further clarified by the issuance of ASU No. 2018-03, "Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities" in February 2018. The standards are effective for public companies in fiscal years beginning after December 15, 2017, and the Company adopted the standards effective January 1, 2018. The adoption of these standards did not have a material impact on the Company's financial position, results of operations or cash flows. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)", which significantly changes the accounting for operating leases by lessees. The accounting applied by lessors is largely unchanged from that applied under previous guidance. The new guidance requires lessees to recognize lease assets and lease liabilities in the balance sheet, initially measured at the present value of the lease payments, for leases which were classified as operating leases under previous guidance. Lease cost included in the statement of operations will be calculated so that the cost of the lease is allocated over the lease term, generally on a straight-line basis. Lessees may make an accounting policy election to exclude leases with a term of 12 months or less from the requirement to record related assets and liabilities. The new standard is effective for public companies for fiscal years beginning after December 15, 2018. The Company plans to adopt the new standard effective January 1, 2019. The Company does not expect the adoption of this standard to have a material impact on its results of operations or cash flows; however, the Company has not determined the impact the adoption of this new standard will have on its financial position. In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments – Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments". The standard changes how credit losses are measured for most financial assets and certain other instruments that currently are not measured through net income. The standard will require an expected loss model for instruments measured at amortized cost as opposed to the current incurred loss approach. In valuing available for sale debt securities, allowances will be required to be recorded, rather than the current approach of reducing the carrying amount, for other than temporary impairments. A cumulative adjustment to retained earnings is to be recorded as of the beginning of the period of adoption to reflect the impact of applying the provisions of the standard. The standard is effective for public companies for periods beginning after December 15, 2019 and the Company expects to adopt the new standard as of January 1, 2020. The Company has not yet determined what impact, if any, the adoption of this new standard will have on the Company's financial position, results of operations or cash flows. In August 2016, the FASB issued ASU No. 2016-15, "Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force)" which clarifies how certain cash receipts and cash payments should be presented on the statement of cash flows. The statement also addresses how the predominance principle should be applied when cash payments have aspects of more than one class of cash flows. In October 2016, the FASB issued ASU No. 2016-16, "Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory" which requires companies to account for the income tax effects of intercompany sales and transfers of assets other than inventory, such as intangible assets, when the transfer occurs. This is a change from previous guidance, which required companies to defer the income tax effects of intercompany transfers of assets until the asset has been sold to an outside party or otherwise recognized by being depreciated, amortized or impaired. The new guidance requires companies to defer the income tax effects of only intercompany transfers of inventory. The standard is effective for public companies in fiscal years beginning after December 15, 2017. In January 2017, the FASB issued ASU No. 2017-01, "Business Combinations (Topic 805), Clarifying the Definition of a Business," which provides additional guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The standard is effective for public companies for annual or interim periods beginning after December 15, 2017. The Company adopted the new standard effective January 1, 2018. The application of this standard did not have a material impact on the Company's financial position, results of operations or cash flows. In August 2017, the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815), Targeted Improvements to Hedging Activities", to improve the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements. The new guidance is effective for public companies for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted in any interim period after its issuance. The Company plans to adopt the new standard effective January 1, 2019. The Company does not expect the application of this standard to have a material impact on its financial position, results of operations or cash flows. In February 2018, the FASB issued ASU No. 2018-02, "Income Statement – Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income", which permits companies to reclassify tax effects stranded in accumulated other comprehensive income ("OCI") as a result of tax reform impacting tax rates or other items, such as changing from a worldwide tax system to a territorial system, from OCI to retained earnings. Other tax effects stranded in OCI due to other reasons, such as prior changes in tax laws or changes in valuation allowances, may not be reclassified. Additional disclosures will also be required upon adoption of the new standard. The new standard is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company does not expect the adoption of this standard to have a material impact on its financial position, results of operations or cash flows. In March 2018, the FASB issued ASU No. 2018-05 "Income Taxes (Topic 740), amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SEC Update)", which addresses the accounting and disclosures around the enactment of the Tax Cuts and Jobs Act and the Securities and Exchange Commission's Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act ("SAB 118"). The Company adopted this new standard in the first quarter of 2018. See Note 10, Income Taxes, for the disclosures related to this amended guidance.

Earnings (Loss) per Share

Earnings (Loss) per Share	6 Months Ended
	Jun. 30, 2018
Earnings (Loss) per Share [Abstract]
Earnings (Loss) per Share	Note 2. Earnings (Loss) per Share Basic earnings (loss) per share are determined by dividing earnings (loss) by the weighted average number of common shares outstanding during each period. Diluted earnings (loss) per share include the potential dilutive effect of restricted stock units and shares held in the Company's Supplemental Executive Retirement Plan. The following table sets forth net income (loss) attributable to controlling interest and the number of basic and diluted shares used in the computation of earnings (loss) per share: Three Months Ended Six Months Ended 2018 2017 2018 2017 Numerator: Net income (loss) attributable to controlling interest $ (40,674 ) $ 14,420 $ (20,407 ) $ 29,540 Denominator: Denominator for basic earnings (loss) per share 23,061 23,026 23,053 23,020 Effect of dilutive securities: Restricted stock units -- 93 -- 97 Supplemental Executive Retirement Plan -- 64 -- 62 Denominator for diluted earnings (loss) per share 23,061 23,183 23,053 23,179

Receivables

Receivables	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Receivables	Note 3. Receivables Receivables are net of allowances for doubtful accounts of $1,519 and $1,716 as of June 30, 2018 and December 31, 2017, respectively.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2018
Inventories [Abstract]
Inventories	Note 4. Inventories Inventories consist of the following: June 30, December 31, Raw materials and parts $ 168,253 $ 146,144 Work-in-process 76,523 129,441 Finished goods 128,126 94,571 Used equipment 21,887 21,223 Total $ 394,789 $ 391,379 Raw materials and parts are comprised of purchased steel and other purchased items for use in the manufacturing process or held for sale for the after-market parts business. The category also includes the manufacturing cost of completed equipment sub-assemblies produced for either integration into equipment manufactured at a later date or for sale in the Company's after-market parts business. Work-in-process consists of the value of materials, labor and overhead incurred to date in the manufacturing of incomplete equipment or incomplete equipment sub-assemblies being produced. Finished goods consist of completed equipment manufactured for sale to customers. Finished goods inventory at June 30, 2018 includes a three-line pellet plant located at a customer's site in Georgia with an inventory value of $59,521. Used equipment consists of equipment accepted in trade or purchased on the open market. The category also includes equipment rented to prospective customers on a short-term or month-to-month basis. Used equipment is valued at the lower of acquired or trade-in cost or net realizable value determined on each separate unit. Inventories are valued at the lower of cost (first-in, first-out) or net realizable value, which requires the Company to make specific estimates, assumptions and judgments in determining the amount, if any, of reductions in the valuation of inventories to their net realizable values. The net realizable values of the Company's products are impacted by a number of factors, including changes in the price of steel, competitive sales pricing, quantities of inventories on hand, the age of the individual inventory items, market acceptance of the Company's products, actions by our competitors, the condition of our used and rental inventory and general economic factors. Once an inventory item's value has been deemed to be less than cost, a net realizable value adjustment is calculated and a new "cost basis" for that item is effectively established. This new cost is retained for that item until such time as the item is disposed of or the Company determines that an additional write-down is necessary. Additional write-downs may be required in the future based upon changes in assumptions due to general economic downturns in the markets in which the Company operates, changes in competitor pricing, new product design or other technological advances introduced by the Company or its competitors and other factors unique to individual inventory items. The most significant component of the Company's inventory is steel. A significant decline in the market price of steel could result in a decline in the market value of the equipment or parts we sell. During periods of significant declining steel prices, the Company reviews the valuation of its inventories to determine if reductions are needed in the recorded value of inventory on hand to its net realizable value. The Company reviews the individual items included in its finished goods, used equipment and rental equipment inventory on a model-by-model or unit-by-unit basis to determine if any item's net realizable value is below its carrying value. This analysis is expanded to include items in work-in-process and raw material inventory if factors indicate those items may also be impacted. In performing this review, judgments are made and, in addition to the factors discussed above, additional consideration is given to the age of the specific items of used or rental inventory, prior sales offers or lack thereof, the physical condition of the specific items and general market conditions for the specific items. Additionally, an analysis of raw material inventory is performed to calculate reserves needed for obsolete inventory based upon quantities of items on hand, the age of those items and their recent and expected future usage or sale. When the Company determines that the value of inventory has become impaired through damage, deterioration, obsolescence, changes in price levels, excessive levels of inventory or other causes, the Company reduces the carrying value to the net realizable value based on estimates, assumptions and judgments made from the information available at that time. Abnormal amounts of idle facility expense, freight, handling cost and wasted materials are recognized as current period charges.

Property and Equipment

Property and Equipment	6 Months Ended
	Jun. 30, 2018
Property and Equipment [Abstract]
Property and Equipment	Note 5. Property and Equipment Property and equipment is stated at cost, less accumulated depreciation of $244,885 and $237,742 as of June 30, 2018 and December 31, 2017, respectively.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 6. Fair Value Measurements The Company has various financial instruments that must be measured at fair value on a recurring basis, including marketable debt and equity securities held by Astec Insurance Company ("Astec Insurance"), the Company's captive insurance company, and marketable equity securities held in an unqualified Supplemental Executive Retirement Plan ("SERP"). The obligations of the Company associated with the financial assets held in the SERP also constitute a liability of the Company for financial reporting purposes and are included in other long-term liabilities in the accompanying unaudited condensed consolidated balance sheets. The Company's subsidiaries also occasionally enter into foreign currency exchange contracts to mitigate exposure to fluctuations in currency exchange rates. The carrying amount of cash and cash equivalents, trade receivables, other receivables, revolving debt, accounts payable and long-term debt approximates their fair value because of their short-term nature and/or interest rates associated with the instruments. Investments are carried at their fair value based on quoted market prices for identical or similar assets or, where no quoted prices exist, other observable inputs for the asset. The fair values of foreign currency exchange contracts are based on quotations from various banks for similar instruments using models with market based inputs. Financial assets and liabilities are categorized based upon the level of judgment associated with the inputs used to measure their fair value. The inputs used to measure the fair value are identified in the following hierarchy: Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - Unadjusted quoted prices in active markets for similar assets or liabilities; or unadjusted Level 3 - Inputs reflect management's best estimate of what market participants would use in pricing As indicated in the tables below (which excludes the Company's pension assets), the Company has determined that all of its financial assets and liabilities as of June 30, 2018 and December 31, 2017 are Level 1 and Level 2 in the fair value hierarchy as defined above: June 30, 2018 Level 1 Level 2 Total Financial Assets: Trading equity securities: SERP money market fund $ 257 $ -- $ 257 SERP mutual funds 5,247 -- 5,247 Preferred stocks 283 -- 283 Trading debt securities: Corporate bonds 5,495 -- 5,495 Municipal bonds -- 1,522 1,522 Floating rate notes 1,556 -- 1,556 U.S. Treasury notes 1,306 -- 1,306 Asset backed securities -- 478 478 Other -- 852 852 Derivative financial instruments -- 538 538 Total financial assets $ 14,144 $ 3,390 $ 17,534 Financial Liabilities: SERP liabilities $ -- $ 8,913 $ 8,913 Total financial liabilities $ -- $ 8,913 $ 8,913 December 31, 2017 Level 1 Level 2 Total Financial Assets: Trading equity securities: SERP money market fund $ 124 $ -- $ 124 SERP mutual funds 4,839 -- 4,839 Preferred stocks 364 -- 364 Trading debt securities: Corporate bonds 5,661 -- 5,661 Municipal bonds -- 1,912 1,912 Floating rate notes 753 -- 753 U.S. Treasury notes 1,030 -- 1,030 Asset backed securities -- 526 526 Other -- 968 968 Total financial assets $ 12,771 $ 3,406 $ 16,177 Financial Liabilities: SERP liabilities $ -- $ 8,552 $ 8,552 Derivative financial instruments -- 112 112 Total financial liabilities $ -- $ 8,664 $ 8,664 The Company reevaluates the volume of trading activity for each of its investments at the end of each quarter and adjusts the level within the fair value hierarchy as needed. No investments changed hierarchy levels from December 31, 2017 to June 30, 2018. The trading equity investments noted above are valued at their fair value based on their quoted market prices, and the debt securities are valued based upon a mix of observable market prices and model driven prices derived from a matrix of observable market prices for assets with similar characteristics obtained with the assistance of a nationally recognized third-party pricing service. Additionally, a significant portion of the SERP's investments in trading equity securities are in money market and mutual funds. As these money market and mutual funds are held in a SERP, they are also included in the Company's liability under its SERP. Trading debt securities are comprised of marketable debt securities held by Astec Insurance. Astec Insurance has an investment strategy that focuses on providing regular and predictable interest income from a diversified portfolio of high-quality fixed income securities. Net unrealized gains or losses incurred on investments held amounted to net gains of $149 and $242 as of June 30, 2018 and December 31, 2017, respectively.

Debt

Debt	6 Months Ended
	Jun. 30, 2018
Debt [Abstract]
Debt	Note 7. Debt On April 12, 2017, the Company and certain of its subsidiaries entered into an amended and restated credit agreement whereby Wells Fargo extended to the Company an unsecured line of credit of up to $100,000, including a sub-limit for letters of credit of up to $30,000. There were no borrowings outstanding under the agreement at any time during the six-month period ended June 30, 2018. Letters of credit totaling $9,941, including $3,200 of letters of credit issued to banks in Brazil to secure the local debt of Astec do Brasil Fabricacao de Equipamentos Ltda. ("Astec Brazil"), were outstanding under the credit facility as of June 30, 2018, resulting in additional borrowing ability of $90,059 under the credit facility. The credit agreement has a five-year term expiring in April 2022. Borrowings under the agreement are subject to an interest rate equal to the daily one-month LIBOR rate plus a 0.75% margin, resulting in a rate of 2.85% as of June 30, 2018. The unused facility fee is 0.125%. Interest only payments are due monthly. The amended and restated credit agreement contains certain financial covenants, including provisions concerning required levels of annual net income and minimum tangible net worth. The Company's South African subsidiary, Osborn Engineered Products SA (Pty) Ltd ("Osborn"), has a credit facility of $6,927 with a South African bank to finance short-term working capital needs, as well as to cover performance letters of credit, advance payment and retention guarantees. As of June 30, 2018, Osborn had no outstanding borrowings but had $1,236 in performance, advance payment and retention guarantees outstanding under the facility. The facility has been guaranteed by Astec Industries, Inc., but is otherwise unsecured. A 0.75% unused facility fee is charged if less than 50% of the facility is utilized. As of June 30, 2018, Osborn had available credit under the facility of $5,691. The interest rate is 0.25% less than the South Africa prime rate, resulting in a rate of 9.75% as of June 30, 2018. The Company's Brazilian subsidiary, Astec Brazil, has outstanding working capital loans totaling $2,039 as of June 30, 2018 from Brazilian banks with interest rates ranging from 10.4% to 11.0%. The loans' maturity dates range from November 2018 to April 2024 and the debts are secured by Astec Brazil's manufacturing facility and also by letters of credit totaling $3,200 issued by Astec Industries, Inc. Additionally, Astec Brazil has various five-year equipment financing loans outstanding with Brazilian banks in the aggregate of $335 as of June 30, 2018 that have interest rates ranging from 3.5% to 16.3%. These equipment loans have maturity dates ranging from September 2018 to April 2020. Astec Brazil's loans are included in the accompanying unaudited condensed consolidated balance sheets as current maturities of long-term debt ($1,312) and long-term debt ($1,062) as of June 30, 2018.

Product Warranty Reserves

Product Warranty Reserves	6 Months Ended
	Jun. 30, 2018
Product Warranty Reserves [Abstract]
Product Warranty Reserves	Note 8. Product Warranty Reserves The Company warrants its products against manufacturing defects and performance to specified standards. The warranty period and performance standards vary by market and uses of its products, but generally range from three months to two years or up to a specified number of hours of operation. The Company estimates the costs that may be incurred under its warranties and records a liability at the time product sales are recorded. The product warranty liability is primarily based on historical claim rates, nature of claims and the associated cost. Changes in the Company's product warranty liability for the three and six-month periods ended June 30, 2018 and 2017 are as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 Reserve balance, beginning of the period $ 16,013 $ 13,719 $ 15,410 $ 13,156 Warranty liabilities accrued 4,076 4,252 7,529 8,248 Warranty liabilities settled (3,851 ) (3,724 ) (6,676 ) (7,184 ) Pellet plant agreement warranty write-off (4,806 ) -- (4,806 ) -- Other 112 22 87 49 Reserve balance, end of the period $ 11,544 $ 14,269 $ 11,544 $ 14,269

Accrued Loss Reserves

Accrued Loss Reserves	6 Months Ended
	Jun. 30, 2018
Accrued Loss Reserves [Abstract]
Accrued Loss Reserves	Note 9. Accrued Loss Reserves The Company records reserves for losses related to known workers' compensation and general liability claims that have been incurred but not yet paid or are estimated to have been incurred but not yet reported to the Company. The undiscounted reserves are actuarially determined based on the Company's evaluation of the type and severity of individual claims and historical information, primarily its own claims experience, along with assumptions about future events. Changes in assumptions, as well as changes in actual experience, could cause these estimates to change in the future. Total accrued loss reserves were $8,627 as of June 30, 2018 and $8,119 as of December 31, 2017, of which $6,524 and $5,615 were included in other long-term liabilities in the accompanying unaudited condensed consolidated balance sheets as of June 30, 2018 and December 31, 2017, respectively.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Taxes [Abstract]
Income Taxes	Note 10. Income Taxes The Company's combined effective income tax rate was 17.3% and 32.8% for the three-month periods ended June 30, 2018 and 2017, respectively. The Company's combined effective income tax rate was 10.8% and 33.5% for the six-month periods ended June 30, 2018 and 2017, respectively. The Company's effective tax rates for the three and six-month periods ended June 30, 2018 and 2017 include the effect of state income taxes and other discrete items as well as a benefit for research and development credits. Additionally, the Company's tax provision for the three and six-month periods of 2018 includes a tax benefit of $13,847 due to certain pellet plant agreement costs incurred in the second quarter discussed further in Note 11. The Company's recorded liability for uncertain tax positions as of June 30, 2018 has increased by approximately $7 as compared to December 31, 2017 due to additional taxes and interest on existing reserves. On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (the "Tax Act") was signed into law making significant changes to the Internal Revenue Code ("IRC"). Changes include, but are not limited to, a federal corporate tax rate decrease from 35% to 21% for tax years beginning after December 31, 2017, the transition of U.S. international taxation from a worldwide tax system to a territorial system and a one-time transition tax on the mandatory deemed repatriation of foreign earnings. The Company's fourth quarter 2017 provision for income taxes was reduced by $1,056 (comprised of a $1,548 reduction in income tax expense recorded in connection with the remeasurement of deferred tax assets and liabilities and $492 of additional income tax expense recorded in connection with the transition tax on the mandatory deemed repatriation of foreign earnings) due to applying the provisions of the Tax Act. As of June 30, 2018, the Company has not remeasured the one-time transition tax. The accounting for the one-time transition tax is expected to be completed in the fourth quarter of 2018. The Tax Act also repealed the Domestic Production Activities Deduction ("DPAD") provided under IRC §199 for tax years beginning after December 31, 2017. As such, no DPAD benefit is reflected in the six-month period ended June 30, 2018. The DPAD benefit, which has historically been material to the Company's federal income taxes, reduced income tax expense by $1,127 for the six-month period ended June 30, 2017. In March 2018, the FASB issued ASU No. 2018-05 "Income Taxes (Topic 740), amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SEC Update)", which addresses the accounting and disclosures around the enactment of the Tax Act and SAB 118, which was issued in December 2017. In addition to providing for a territorial tax system, beginning in 2018 the Tax Act also includes two new U.S. tax base erosion provisions: the global intangible low-taxed income ("GILTI") provisions and the base-erosion and anti-abuse tax ("BEAT") provisions. The GILTI provisions require the Company to include, in its U.S. federal income tax return, foreign subsidiary earnings in excess of an allowable return on the foreign subsidiary's tangible assets. The Company elected to account for GILTI tax in the period in which it is incurred, and, therefore, did not provide any deferred tax impacts of GILTI in its consolidated financial statements as of December 31, 2017; however, a reasonable estimate of its impact has been included in the Company's effective tax rate for the three and six-month periods ended June 30, 2018. The BEAT provisions in the Tax Act eliminates the deduction of certain base-erosion payments made to related foreign corporations and imposes a minimum tax, if greater than regular tax. The Company does not expect it will be subject to this tax, and, therefore, has not included any tax impact of BEAT in its unaudited condensed consolidated financial statements for the six-month period ended June 30, 2018. The Tax Act also provides for a new U.S. tax deduction, the foreign-derived intangible income ("FDII") provision. The FDII provision allows the Company to claim a deduction, in its U.S. federal income tax return, based upon a percentage of calculated taxable income from foreign-derived intangible income. A reasonable estimate of its impact has been included in the Company's effective tax rate for the three and six-month periods ended June 30, 2018.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2018
Revenue Recognition [Abstract]
Revenue Recognition	Note 11. Revenue Recognition: The following table disaggregates our revenue by major source for the three-month period ended June 30, 2018 (excluding intercompany sales): Infrastructure Aggregate Energy Total Net Sales-Domestic: Equipment sales $ 102,724 $ 57,989 $ 41,911 $ 202,624 Pellet plant agreement sale charge (75,315 ) -- -- (75,315 ) Parts and component sales 29,269 18,311 11,479 59,059 Service and equipment installation revenue 3,283 564 1,332 5,179 Used equipment sales 1,384 652 768 2,804 Freight revenue 3,216 1,912 1,617 6,745 Other 511 (535 ) 2,314 2,290 Total domestic revenue 65,072 78,893 59,421 203,386 Net Sales-International: Equipment sales 12,040 23,385 9,075 44,500 Parts and component sales 4,310 12,070 3,280 19,660 Service and equipment installation revenue 644 328 229 1,201 Used equipment sales 661 630 583 1,874 Freight revenue 429 967 412 1,808 Other 46 24 29 99 Total international revenue 18,130 37,404 13,608 69,142 Total net sales $ 83,202 $ 116,297 $ 73,029 $ 272,528 The following table disaggregates our revenue by major source for the six-month period ended June 30, 2018 (excluding intercompany sales): Infrastructure Aggregate Energy Total Net Sales-Domestic: Equipment sales $ 188,242 $ 121,483 $ 78,643 $ 388,368 Pellet plant agreement sale charge (75,315 ) -- -- (75,315 ) Parts and component sales 70,382 36,145 22,794 129,321 Service and equipment installation revenue 5,211 890 3,428 9,529 Used equipment sales 3,009 2,063 935 6,007 Freight revenue 7,254 3,720 2,949 13,923 Other 775 (1,571 ) 2,427 1,631 Total domestic revenue 199,558 162,730 111,176 473,464 Net Sales-International: Equipment sales 17,955 45,712 13,837 77,504 Parts and component sales 9,372 22,359 5,752 37,483 Service and equipment installation revenue 1,457 640 229 2,326 Used equipment sales 1,164 1,486 583 3,233 Freight revenue 683 2,297 676 3,656 Other 107 140 68 315 Total international revenue 30,738 72,634 21,145 124,517 Total net sales $ 230,296 $ 235,364 $ 132,321 $ 597,981 Revenue is recognized when obligations under the terms of a contract are satisfied and generally occurs with the transfer of control of the product or services at a point in time. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. The Company generally obtains purchase authorizations from its customers for a specified amount of products at a specified price with specific delivery terms. A significant portion of the Company's equipment sales represents equipment produced in the Company's manufacturing facilities under short-term contracts for a customer's project or equipment designed to meet a customer's requirements. Most of the equipment sold by the Company is based on standard configurations, some of which are modified to meet customer's needs or specifications. The Company provides customers with technical design and performance specifications and typically performs pre-shipment testing when feasible to ensure the equipment performs according to the customer's need, regardless of whether the Company provides installation services in addition to the equipment. Significant down payments are required on many equipment orders with other terms allowing for payment shortly after shipment, typically 30 days. Taxes assessed by a governmental authority that are directly imposed on revenue-producing transactions between the Company and its customers, such as sales, use, value-added and some excise taxes, are excluded from revenue. Expected warranty costs for our standard warranties are expensed at the time the related revenue is recognized. Costs of obtaining sales contracts with an expected duration of one year or less are expensed as incurred. As contracts are typically fulfilled within one year from the date of the contract, revenue adjustments for a potential financing component or the costs to obtain the contract are not made. Other contract assets are not material. Depending on the terms of the arrangement with the customer, recognition of a portion of the consideration received may be deferred and recorded as a contract liability if we have to satisfy a future obligation, such as to provide installation assistance, service work to be performed in the future without charge, floor plan interest to be reimbursed to our dealer customers or for annual rebates given to certain high volume customers. Contract liabilities, excluding customer deposits and accrued pellet plant agreement costs, are immaterial at June 30, 2018. Certain contracts include terms and conditions pursuant to which the Company recognizes revenues upon the completion of production, and the equipment is subsequently stored at the Company's plant at the customer's request. Revenue is recorded on such contracts upon the customer's assumption of title and risk of ownership, which transfers control of the equipment, and when collectability is reasonably assured. Additionally, in order to recognize the sale as a bill and hold, the product must be identified as belonging to the customer, be ready for physical transfer to the customer and the Company cannot have the ability to use the product or to direct it to another customer. The Company had a pellet plant sale which has been accounted for over time using the ratio of costs incurred to estimated total costs. Pellet plant sales recognized under the over-time method in the first half of 2018 for production activities were not significant. Penalties are accounted for as a reduction in net sales. Subsequent to June 30, 2018, the Company entered into an agreement with its pellet plant customer due to unresolved issues which inhibited the plant's ability to meet contractual provisions by the date required (June 29, 2018) in the Company's sales contract with its customer. Under the terms of the pellet plant agreement, the Company agreed to pay its customer $68,000 over 120 days following the execution of the agreement. Considering this liability and other provisions of the pellet plant agreement, including the forgiveness of $7,315 of accounts receivable due from the customer, a charge of $75,315 against sales was recorded in the second quarter of 2018. Net contract assets/liabilities, excluding the $68,000 liability under the pellet plant agreement, were not material as of June 30, 2018. Net contract assets/liabilities were a liability of $2,757 as of December 31, 2017. Service and Equipment Installation Revenue – The Company often contracts with the purchaser of certain of its equipment to provide installation services. Installation is typically separately priced in the contract based upon observable market prices for stand-alone performance obligations or a cost plus margin approach when one is not available. The Company may also provide future service on equipment sold at the customer's request, which may be for equipment repairs after the warranty period expires. Service is billed on a cost plus margin approach or at a standard rate per hour. Used Equipment Sales – Used equipment is obtained by trade-in on new equipment sales, as a separate purchase in the open market or from the Company's equipment rental business. Revenues from the sale of used equipment are recognized upon transfer of control to the customer at agreed upon pricing. Freight Revenue - The Company records revenues earned for shipping and handling as revenue at the time of shipment, regardless of whether or not it is identified as a separate performance obligation. The cost of shipping and handling is classified as cost of goods sold concurrently. Other Revenues – Miscellaneous revenues and offsets not associated with one of the above classifications include rental revenues, extend warranty revenues, early pay discounts and floor plan interest reimbursements.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2018
Segment Information [Abstract]
Segment Information	Note 12. Segment Information The Company has three reportable segments, each of which is comprised of multiple business units that offer similar products and services and meet the requirements for aggregation. A brief description of each segment is as follows: Infrastructure Group Aggregate and Mining Group Energy Group Corporate The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Intersegment sales and transfers are valued at prices comparable to those for unrelated parties. Segment Information: Three Months Ended June 30, 2018 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 83,202 $ 116,297 $ 73,029 $ -- $ 272,528 Intersegment sales 3,370 5,102 6,724 -- 15,196 Gross profit (loss) (47,817 ) 29,042 19,808 75 1,108 Gross profit (loss) percent (57.5 )% 25.0 % 27.1 % -- 0.4 % Segment profit (loss) $ (62,734 ) $ 12,548 $ 8,477 $ 596 $ (41,113 ) Six Months Ended June 30, 2018 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 230,296 $ 235,364 $ 132,321 $ -- $ 597,981 Intersegment sales 11,641 9,008 11,863 -- 32,512 Gross profit (loss) (14,536 ) 58,331 35,095 223 79,113 Gross profit (loss) percent (6.3 )% 24.8 % 26.5 % -- 13.2 % Segment profit (loss) $ (47,882 ) $ 25,658 $ 13,088 $ (10,652 ) $ (19,788 ) Three Months Ended June 30, 2017 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 143,106 $ 107,118 $ 51,685 $ -- $ 301,909 Intersegment sales 4,434 6,016 7,016 -- 17,466 Gross profit 26,820 25,791 12,864 49 65,524 Gross profit percent 18.7 % 24.1 % 24.9 % -- 21.7 % Segment profit (loss) $ 9,893 $ 11,367 $ 3,165 $ (10,260 ) $ 14,165 Six Months Ended June 30, 2017 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 308,349 $ 207,731 $ 104,230 $ -- $ 620,310 Intersegment sales 8,459 9,452 12,607 -- 30,518 Gross profit 64,621 50,814 25,751 110 141,296 Gross profit percent 21.0 % 24.5 % 24.7 % -- 22.8 % Segment profit (loss) $ 28,073 $ 19,795 $ 5,894 $ (24,689 ) $ 29,073 A reconciliation of total segment profit (loss) to the Company's consolidated totals is as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 Total segment profit (loss) $ (41,113 ) $ 14,165 $ (19,788 ) $ 29,073 Recapture (elimination) of intersegment profit 345 194 (764 ) 366 Net income (loss) (40,768 ) 14,359 (20,552 ) 29,439 Net loss attributable to non-controlling interest in subsidiaries (94 ) (61 ) (145 ) (101 ) Net income (loss) attributable to controlling interest $ (40,674 ) $ 14,420 $ (20,407 ) $ 29,540

Contingent Matters

Contingent Matters	6 Months Ended
	Jun. 30, 2018
Contingent Matters [Abstract]
Contingent Matters	Note 13. Contingent Matters Certain customers have financed purchases of Company products through arrangements in which the Company is contingently liable for customer debt of $3,213 as of June 30, 2018. The maximum potential amount of future payments for which the Company would be liable was equal to $3,213 as of June 30, 2018. These arrangements also provide that the Company will receive the lender's full security interest in the equipment financed if the Company is required to fulfill its contingent liability under these arrangements. The Company has recorded a liability of $831 related to these guarantees as of June 30, 2018. In addition, the Company is contingently liable under letters of credit issued by Wells Fargo totaling $9,941 as of June 30, 2018, including $3,200 of letters of credit that guarantee certain Astec Brazil bank debt. The outstanding letters of credit expire at various dates through October 2020. As of June 30, 2018, the Company's foreign subsidiaries are contingently liable for a total of $2,998 in performance letters of credit, advance payments and retention guarantees. The maximum potential amount of future payments under these letters of credit and guarantees for which the Company could be liable is $12,939 as of June 30, 2018. The Company's sales contract with the purchaser of a large wood pellet plant, on which $143,300 of revenue (prior to the $75,315 charge discussed below) has been recorded through June 30, 2018 based on the over-time method, contained certain production output and operational provisions, which if not timely met, could have resulted in the Company having to refund the purchase price to the customer. Additional contract provisions required the Company to compensate the customer for production shortfalls caused by the Company and other potential costs (depending on the market price of wood pellets). As the plant did not meet the production output and operational specifications by the deadline set forth in the contract (June 29, 2018), the Company entered into an agreement with the customer on July 20, 2018 whereby the Company agreed to pay its customer $68,000 over 120 days following execution of the agreement and to forgive $7,315 in accounts receivables to obtain a full release of all the Company's contractual obligations under the sales contract. The terms of the pellet plant agreement resulted in the Company recording charges against sales of $75,315 and gross margins of $71,029 in the second quarter of 2018. The pellet plant agreement also stipulates that the customer will pay the Company $7,000 if the wood pellet plant's performance satisfies certain emissions targets prior to May 1, 2019. The Company produced a large wood pellet plant for a customer under a Company-financed arrangement whereby the Company deferred the recognition of revenues as payment under the arrangement was not assured. While the plant is currently operational and meeting its production goals, the customer has expressed its desire to further modify its obligations under the arrangement. As a result, the parties have agreed to jointly market the plant to a new buyer. The Company expects the ultimate sale of the plant will result in the payments to the Company in excess of the $59,521 inventory value currently recorded; however, future inventory reserves or losses upon the ultimate sale of the plant may occur. As required by the arrangement with the customer, the Company is currently funding the operation of the plant and may be responsible for operational losses should they occur prior to the ultimate sale of the plant. The Company is currently a party to various claims and legal proceedings that have arisen in the ordinary course of business. If management believes that a loss arising from such claims and legal proceedings is probable and can reasonably be estimated, the Company records the amount of the loss (excluding estimated legal fees) or the minimum estimated liability when the loss is estimated using a range and no point within the range is more probable than another. As management becomes aware of additional information concerning such contingencies, any potential liability related to these matters is assessed and the estimates are revised, if necessary. If management believes that a loss arising from such claims and legal proceedings is either (i) probable but cannot be reasonably estimated or (ii) reasonably possible but not probable, the Company does not record the amount of the loss, but does make specific disclosure of such matter. Based upon currently available information and with the advice of counsel, management believes that the ultimate outcome of its current claims and legal proceedings, individually and in the aggregate, will not have a material adverse effect on the Company's financial position, cash flows or results of operations. However, claims and legal proceedings are subject to inherent uncertainties and rulings unfavorable to the Company could occur. If an unfavorable ruling were to occur, there exists the possibility of a material adverse effect on the Company's financial position, cash flows or results of operations.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2018
Shareholders' Equity [Abstract]
Shareholders' Equity	Note 14. Shareholders' Equity Under the Company's long-term incentive plans, key members of management may be issued restricted stock units ("RSUs") each year based upon the annual financial performance of the Company and its subsidiaries. The number of RSUs granted to employees each year is determined based upon the performance of individual subsidiaries and consolidated annual financial performance. Generally, for RSUs granted through 2016, each award will vest at the end of five years from the date of grant, or at the time a recipient retires after reaching age 65, if earlier. Awards granted in 2017 and thereafter will vest at the end of three years from the date of grant or at the time a recipient retires after reaching age 65, if earlier. Additional RSUs are granted to the Company's outside directors under the Company's Non-Employee Directors Compensation Plan with a one-year vesting period. A total of 32 and 30 RSUs vested during the six-month periods ended June 30, 2018 and 2017, respectively. The Company withheld 8 shares due to statutory payroll tax withholding requirements upon the vesting of the RSUs during the first six month periods in both 2018 and 2017, and used Company funds to remit the related required minimum withholding taxes to the various tax authorities. The vesting date fair value of the RSUs that vested during the first six months of 2018 and 2017 was $1,853 and $1,975, respectively. The grant date fair value of the RSUs granted during the first six months of 2018 and 2017 was $3,553 and $5,399, respectively. Compensation expense of $1,019 and $1,498 was recorded in the six-month periods ended June 30, 2018 and 2017, respectively, to reflect the fair value of RSUs granted (or anticipated to be granted for 2018 performance) to employees amortized over the portion of the vesting period occurring during the periods.

Other Income, Net of Expenses

Other Income, Net of Expenses	6 Months Ended
	Jun. 30, 2018
Other Income, Net of Expenses [Abstract]
Other Income, Net of Expenses	Note 15. Other Income, Net of Expenses Other income, net of expenses for the three and six-month periods ended June 30, 2018 and 2017 is presented below: Three Months Ended Six Months Ended 2018 2017 2018 2017 Interest income $ 239 $ 157 $ 453 $ 332 Gain (loss) on investments 34 14 (69 ) 41 Insurance recovery 635 -- 635 -- Other 144 90 494 400 Total $ 1,052 $ 261 $ 1,513 $ 773

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2018
Derivative Financial Instruments [Abstract]
Derivative Financial Instruments	Note 16. Derivative Financial Instruments The Company is exposed to certain risks related to its ongoing business operations. The primary risk managed by using derivative instruments is foreign currency risk. From time to time the Company's foreign subsidiaries enter into foreign currency exchange contracts to mitigate exposure to fluctuations in currency exchange rates. The fair value of the derivative financial instrument is recorded on the Company's balance sheet and is adjusted to fair value at each measurement date. The changes in fair value are recognized in the consolidated statements of operations in the current period. The Company does not engage in speculative transactions nor does it hold or issue financial instruments for trading purposes. The average U.S. dollar equivalent notional amount of outstanding foreign currency exchange contracts was $12,020 during the six-month period ended June 30, 2018. The Company reported $538 of derivative assets in other current assets at June 30, 2018 and $112 of derivative liabilities in other current liabilities at December 31, 2017. The Company recognized, as a component of cost of sales, a net gain of $500 and a net loss of $42 on the change in fair value of derivative financial instruments in the three-month periods ended June 30, 2018 and 2017, respectively. The Company recognized, as a component of cost of sales, a net gain of $687 and a net loss of $392 on the changes in fair value of derivative financial instruments in the six-month periods ended June 2018 and 2017, respectively. There were no derivatives that were designated as hedges at June 30, 2018.

Business Combination

Business Combination	6 Months Ended
	Jun. 30, 2018
Business Combination [Abstract]
Business Combination	Note 17. Business Combination On October 1, 2017, the Company acquired substantially all of the assets and liabilities of RexCon LLC ("RexCon") for a total purchase price of $26,443. The purchase price was paid in cash with $3,000 deposited into escrow for a period of time not to exceed 18 months pending final resolution of certain post-closing adjustments and any indemnification claims. The Company's preliminary allocation of the purchase price includes the recognition of $3,488 of goodwill and $7,778 of other intangible assets consisting of non-compete agreements (5-year useful life), technology (19-year useful life), trade names (15-year useful life) and customer relationships (18-year useful life). RexCon's operating results are included in the Company's Energy Group beginning in the fourth quarter of 2017. RexCon, located in Burlington, Wisconsin since 2009, was founded in 2003 through an asset acquisition with the original company being founded over 100 years ago. RexCon is a manufacturer of high-quality stationary and portable, central mix and ready mix concrete batch plants, concrete mixers and concrete paving equipment. RexCon specializes in providing portable, high-production concrete equipment to contractors and producers worldwide in a totally integrated turnkey production system, including customized site layout and design engineering, batch plants, mixers, water heaters and chillers, ice production and delivery systems, material handling conveyors, gensets and power distribution, cement silos and screws, central dust collection, aggregate heating and cooling systems, batch automation controls and batch office trailers.

Subsequent Event

Subsequent Event	6 Months Ended
	Jun. 30, 2018
Subsequent Event [Abstract]
Subsequent Event	Note 18. Subsequent Event On July 29, 2018, the Company's Board of Directors approved a share repurchase program authorizing the Company to repurchase up to $150,000 of its common stock. Under the share repurchase plan, the Company may purchase common stock in open market transactions, block or privately negotiated transactions, and may from time to time purchase shares pursuant to a trading plan in accordance with Rule 10b5-1 and Rule 10b-18 under the Securities Exchange Act of 1934, as amended, or by any combination of such methods. The number of shares to be purchased and the timing of the purchases are based on a variety of factors. No time limit was set for completion of repurchases under the authorization and the program may be suspended or discontinued at any time.

Significant Accounting Polici25

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X promulgated under the Securities Exchange Act of 1934. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the six-month period ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. It is suggested that these unaudited condensed consolidated financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Astec Industries, Inc. Annual Report on Form 10-K for the year ended December 31, 2017. The unaudited condensed consolidated balance sheet as of December 31, 2017 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. Dollar and share amounts shown are in thousands, except per share amounts, unless otherwise specified.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, "Revenue from Contracts with Customers", which supersedes existing revenue guidance under U.S. GAAP. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Certain provisions of the standard were clarified in March 2016 with the issuance of ASU No. 2016-08, "Revenue from Contracts with Customers (Topic 606)", which provided additional implementation guidance in order to eliminate the potential for diversity in practice arising from inconsistent application of the principal versus agent guidance. Under the new guidance, when an entity determines it is a principal in a transaction, the entity recognizes revenue in the gross amount of consideration; however, in transactions where an entity determines it is an agent, the entity recognizes revenue in the amount of any fee or commission to which it expects to be entitled. These new standards require companies to use more judgment and to make more estimates than under previous guidance and expand required disclosures to include information regarding contract assets and liabilities as well as a more disaggregated view of revenue. The standards are effective for public companies for annual periods beginning after December 15, 2017 and, as such, the Company adopted the new standards effective January 1, 2018 using the modified retrospective transition method. See Note 11, Revenue Recognition, for additional disclosures required by the standards. The adoption of the standards did not have a material impact on the Company's financial position, results of operations or cash flows, and no cumulative effect adjustment to retained earnings was necessitated. In January 2016, the FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10)", which requires, among other things, equity investments with readily determinable fair values, except those accounted for under the equity method of accounting or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. The new standard was further clarified by the issuance of ASU No. 2018-03, "Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities" in February 2018. The standards are effective for public companies in fiscal years beginning after December 15, 2017, and the Company adopted the standards effective January 1, 2018. The adoption of these standards did not have a material impact on the Company's financial position, results of operations or cash flows. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)", which significantly changes the accounting for operating leases by lessees. The accounting applied by lessors is largely unchanged from that applied under previous guidance. The new guidance requires lessees to recognize lease assets and lease liabilities in the balance sheet, initially measured at the present value of the lease payments, for leases which were classified as operating leases under previous guidance. Lease cost included in the statement of operations will be calculated so that the cost of the lease is allocated over the lease term, generally on a straight-line basis. Lessees may make an accounting policy election to exclude leases with a term of 12 months or less from the requirement to record related assets and liabilities. The new standard is effective for public companies for fiscal years beginning after December 15, 2018. The Company plans to adopt the new standard effective January 1, 2019. The Company does not expect the adoption of this standard to have a material impact on its results of operations or cash flows; however, the Company has not determined the impact the adoption of this new standard will have on its financial position. In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments – Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments". The standard changes how credit losses are measured for most financial assets and certain other instruments that currently are not measured through net income. The standard will require an expected loss model for instruments measured at amortized cost as opposed to the current incurred loss approach. In valuing available for sale debt securities, allowances will be required to be recorded, rather than the current approach of reducing the carrying amount, for other than temporary impairments. A cumulative adjustment to retained earnings is to be recorded as of the beginning of the period of adoption to reflect the impact of applying the provisions of the standard. The standard is effective for public companies for periods beginning after December 15, 2019 and the Company expects to adopt the new standard as of January 1, 2020. The Company has not yet determined what impact, if any, the adoption of this new standard will have on the Company's financial position, results of operations or cash flows. In August 2016, the FASB issued ASU No. 2016-15, "Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force)" which clarifies how certain cash receipts and cash payments should be presented on the statement of cash flows. The statement also addresses how the predominance principle should be applied when cash payments have aspects of more than one class of cash flows. In October 2016, the FASB issued ASU No. 2016-16, "Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory" which requires companies to account for the income tax effects of intercompany sales and transfers of assets other than inventory, such as intangible assets, when the transfer occurs. This is a change from previous guidance, which required companies to defer the income tax effects of intercompany transfers of assets until the asset has been sold to an outside party or otherwise recognized by being depreciated, amortized or impaired. The new guidance requires companies to defer the income tax effects of only intercompany transfers of inventory. The standard is effective for public companies in fiscal years beginning after December 15, 2017. In January 2017, the FASB issued ASU No. 2017-01, "Business Combinations (Topic 805), Clarifying the Definition of a Business," which provides additional guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The standard is effective for public companies for annual or interim periods beginning after December 15, 2017. The Company adopted the new standard effective January 1, 2018. The application of this standard did not have a material impact on the Company's financial position, results of operations or cash flows. In August 2017, the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815), Targeted Improvements to Hedging Activities", to improve the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements. The new guidance is effective for public companies for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted in any interim period after its issuance. The Company plans to adopt the new standard effective January 1, 2019. The Company does not expect the application of this standard to have a material impact on its financial position, results of operations or cash flows. In February 2018, the FASB issued ASU No. 2018-02, "Income Statement – Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income", which permits companies to reclassify tax effects stranded in accumulated other comprehensive income ("OCI") as a result of tax reform impacting tax rates or other items, such as changing from a worldwide tax system to a territorial system, from OCI to retained earnings. Other tax effects stranded in OCI due to other reasons, such as prior changes in tax laws or changes in valuation allowances, may not be reclassified. Additional disclosures will also be required upon adoption of the new standard. The new standard is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company does not expect the adoption of this standard to have a material impact on its financial position, results of operations or cash flows. In March 2018, the FASB issued ASU No. 2018-05 "Income Taxes (Topic 740), amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SEC Update)", which addresses the accounting and disclosures around the enactment of the Tax Cuts and Jobs Act and the Securities and Exchange Commission's Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act ("SAB 118"). The Company adopted this new standard in the first quarter of 2018. See Note 10, Income Taxes, for the disclosures related to this amended guidance.

Earnings (Loss) per Share (Tabl

Earnings (Loss) per Share (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings (Loss) per Share [Abstract]
Computation of Earnings (Loss) Per Share	The following table sets forth net income (loss) attributable to controlling interest and the number of basic and diluted shares used in the computation of earnings (loss) per share: Three Months Ended Six Months Ended 2018 2017 2018 2017 Numerator: Net income (loss) attributable to controlling interest $ (40,674 ) $ 14,420 $ (20,407 ) $ 29,540 Denominator: Denominator for basic earnings (loss) per share 23,061 23,026 23,053 23,020 Effect of dilutive securities: Restricted stock units -- 93 -- 97 Supplemental Executive Retirement Plan -- 64 -- 62 Denominator for diluted earnings (loss) per share 23,061 23,183 23,053 23,179

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2018
Inventories [Abstract]
Inventories	Inventories consist of the following: June 30, December 31, Raw materials and parts $ 168,253 $ 146,144 Work-in-process 76,523 129,441 Finished goods 128,126 94,571 Used equipment 21,887 21,223 Total $ 394,789 $ 391,379

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Measurements [Abstract]
Financial Assets and Liabilities, at Fair Value	As indicated in the tables below (which excludes the Company's pension assets), the Company has determined that all of its financial assets and liabilities as of June 30, 2018 and December 31, 2017 are Level 1 and Level 2 in the fair value hierarchy as defined above: June 30, 2018 Level 1 Level 2 Total Financial Assets: Trading equity securities: SERP money market fund $ 257 $ -- $ 257 SERP mutual funds 5,247 -- 5,247 Preferred stocks 283 -- 283 Trading debt securities: Corporate bonds 5,495 -- 5,495 Municipal bonds -- 1,522 1,522 Floating rate notes 1,556 -- 1,556 U.S. Treasury notes 1,306 -- 1,306 Asset backed securities -- 478 478 Other -- 852 852 Derivative financial instruments -- 538 538 Total financial assets $ 14,144 $ 3,390 $ 17,534 Financial Liabilities: SERP liabilities $ -- $ 8,913 $ 8,913 Total financial liabilities $ -- $ 8,913 $ 8,913 December 31, 2017 Level 1 Level 2 Total Financial Assets: Trading equity securities: SERP money market fund $ 124 $ -- $ 124 SERP mutual funds 4,839 -- 4,839 Preferred stocks 364 -- 364 Trading debt securities: Corporate bonds 5,661 -- 5,661 Municipal bonds -- 1,912 1,912 Floating rate notes 753 -- 753 U.S. Treasury notes 1,030 -- 1,030 Asset backed securities -- 526 526 Other -- 968 968 Total financial assets $ 12,771 $ 3,406 $ 16,177 Financial Liabilities: SERP liabilities $ -- $ 8,552 $ 8,552 Derivative financial instruments -- 112 112 Total financial liabilities $ -- $ 8,664 $ 8,664

Product Warranty Reserves (Tabl

Product Warranty Reserves (Tables)	6 Months Ended
	Jun. 30, 2018
Product Warranty Reserves [Abstract]
Product Warranty Liability	Changes in the Company's product warranty liability for the three and six-month periods ended June 30, 2018 and 2017 are as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 Reserve balance, beginning of the period $ 16,013 $ 13,719 $ 15,410 $ 13,156 Warranty liabilities accrued 4,076 4,252 7,529 8,248 Warranty liabilities settled (3,851 ) (3,724 ) (6,676 ) (7,184 ) Pellet plant agreement warranty write-off (4,806 ) -- (4,806 ) -- Other 112 22 87 49 Reserve balance, end of the period $ 11,544 $ 14,269 $ 11,544 $ 14,269

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue Recognition [Abstract]
Disaggregation of Revenue	The following table disaggregates our revenue by major source for the three-month period ended June 30, 2018 (excluding intercompany sales): Infrastructure Aggregate Energy Total Net Sales-Domestic: Equipment sales $ 102,724 $ 57,989 $ 41,911 $ 202,624 Pellet plant agreement sale charge (75,315 ) -- -- (75,315 ) Parts and component sales 29,269 18,311 11,479 59,059 Service and equipment installation revenue 3,283 564 1,332 5,179 Used equipment sales 1,384 652 768 2,804 Freight revenue 3,216 1,912 1,617 6,745 Other 511 (535 ) 2,314 2,290 Total domestic revenue 65,072 78,893 59,421 203,386 Net Sales-International: Equipment sales 12,040 23,385 9,075 44,500 Parts and component sales 4,310 12,070 3,280 19,660 Service and equipment installation revenue 644 328 229 1,201 Used equipment sales 661 630 583 1,874 Freight revenue 429 967 412 1,808 Other 46 24 29 99 Total international revenue 18,130 37,404 13,608 69,142 Total net sales $ 83,202 $ 116,297 $ 73,029 $ 272,528 The following table disaggregates our revenue by major source for the six-month period ended June 30, 2018 (excluding intercompany sales): Infrastructure Aggregate Energy Total Net Sales-Domestic: Equipment sales $ 188,242 $ 121,483 $ 78,643 $ 388,368 Pellet plant agreement sale charge (75,315 ) -- -- (75,315 ) Parts and component sales 70,382 36,145 22,794 129,321 Service and equipment installation revenue 5,211 890 3,428 9,529 Used equipment sales 3,009 2,063 935 6,007 Freight revenue 7,254 3,720 2,949 13,923 Other 775 (1,571 ) 2,427 1,631 Total domestic revenue 199,558 162,730 111,176 473,464 Net Sales-International: Equipment sales 17,955 45,712 13,837 77,504 Parts and component sales 9,372 22,359 5,752 37,483 Service and equipment installation revenue 1,457 640 229 2,326 Used equipment sales 1,164 1,486 583 3,233 Freight revenue 683 2,297 676 3,656 Other 107 140 68 315 Total international revenue 30,738 72,634 21,145 124,517 Total net sales $ 230,296 $ 235,364 $ 132,321 $ 597,981

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Information [Abstract]
Segment Information	The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Intersegment sales and transfers are valued at prices comparable to those for unrelated parties. Segment Information: Three Months Ended June 30, 2018 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 83,202 $ 116,297 $ 73,029 $ -- $ 272,528 Intersegment sales 3,370 5,102 6,724 -- 15,196 Gross profit (loss) (47,817 ) 29,042 19,808 75 1,108 Gross profit (loss) percent (57.5 )% 25.0 % 27.1 % -- 0.4 % Segment profit (loss) $ (62,734 ) $ 12,548 $ 8,477 $ 596 $ (41,113 ) Six Months Ended June 30, 2018 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 230,296 $ 235,364 $ 132,321 $ -- $ 597,981 Intersegment sales 11,641 9,008 11,863 -- 32,512 Gross profit (loss) (14,536 ) 58,331 35,095 223 79,113 Gross profit (loss) percent (6.3 )% 24.8 % 26.5 % -- 13.2 % Segment profit (loss) $ (47,882 ) $ 25,658 $ 13,088 $ (10,652 ) $ (19,788 ) Three Months Ended June 30, 2017 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 143,106 $ 107,118 $ 51,685 $ -- $ 301,909 Intersegment sales 4,434 6,016 7,016 -- 17,466 Gross profit 26,820 25,791 12,864 49 65,524 Gross profit percent 18.7 % 24.1 % 24.9 % -- 21.7 % Segment profit (loss) $ 9,893 $ 11,367 $ 3,165 $ (10,260 ) $ 14,165 Six Months Ended June 30, 2017 Infrastructure Aggregate Energy Corporate Total Net sales to external customers $ 308,349 $ 207,731 $ 104,230 $ -- $ 620,310 Intersegment sales 8,459 9,452 12,607 -- 30,518 Gross profit 64,621 50,814 25,751 110 141,296 Gross profit percent 21.0 % 24.5 % 24.7 % -- 22.8 % Segment profit (loss) $ 28,073 $ 19,795 $ 5,894 $ (24,689 ) $ 29,073
Segment Profit (Loss) to the Company's Consolidated Totals	A reconciliation of total segment profit (loss) to the Company's consolidated totals is as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 Total segment profit (loss) $ (41,113 ) $ 14,165 $ (19,788 ) $ 29,073 Recapture (elimination) of intersegment profit 345 194 (764 ) 366 Net income (loss) (40,768 ) 14,359 (20,552 ) 29,439 Net loss attributable to non-controlling interest in subsidiaries (94 ) (61 ) (145 ) (101 ) Net income (loss) attributable to controlling interest $ (40,674 ) $ 14,420 $ (20,407 ) $ 29,540

Other Income, Net of Expenses (

Other Income, Net of Expenses (Tables)	6 Months Ended
	Jun. 30, 2018
Other Income, Net of Expenses [Abstract]
Other Income, Net of Expenses	Other income, net of expenses for the three and six-month periods ended June 30, 2018 and 2017 is presented below: Three Months Ended Six Months Ended 2018 2017 2018 2017 Interest income $ 239 $ 157 $ 453 $ 332 Gain (loss) on investments 34 14 (69 ) 41 Insurance recovery 635 -- 635 -- Other 144 90 494 400 Total $ 1,052 $ 261 $ 1,513 $ 773

Earnings (Loss) per Share (Deta

Earnings (Loss) per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator [Abstract]
Net income (loss) attributable to controlling interest	$ (40,674)	$ 14,420	$ (20,407)	$ 29,540
Denominator [Abstract]
Denominator for basic earnings (loss) per share (in shares)	23,061	23,026	23,053	23,020
Effect of dilutive securities [Abstract]
Restricted stock units (in shares)	0	93	0	97
Supplemental Executive Retirement Plan (in shares)	0	64	0	62
Denominator for diluted earnings (loss) per share (in shares)	23,061	23,183	23,053	23,179

Receivables (Details)

Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Allowances for doubtful accounts	$ 1,519	$ 1,716

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Inventory, Net [Abstract]
Raw materials and parts	$ 168,253	$ 146,144
Work-in-process	76,523	129,441
Finished goods	128,126	94,571
Used equipment	21,887	21,223
Total	394,789	$ 391,379
Pellet Plant [Member]
Inventory, Net [Abstract]
Finished goods	$ 59,521

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property and Equipment [Abstract]
Accumulated depreciation	$ 244,885	$ 237,742

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Financial Liabilities [Abstract]
Net unrealized gains (losses) incurred	$ 149	$ 242
Amount of investments, Level 1 to Level 2 transfer amount	0
Amount of investments, Level 2 to Level 1 transfer amount	0
Measured at Fair Value on a Recurring Basis [Member]
Financial Assets [Abstract]
Derivative financial instruments	538
Total financial assets	17,534	16,177
Financial Liabilities [Abstract]
SERP liabilities	8,913	8,552
Derivative financial instruments		112
Total financial liabilities	8,913	8,664
Measured at Fair Value on a Recurring Basis [Member] | Corporate Bonds [Member]
Financial Assets [Abstract]
Trading debt securities	5,495	5,661
Measured at Fair Value on a Recurring Basis [Member] | Municipal Bonds [Member]
Financial Assets [Abstract]
Trading debt securities	1,522	1,912
Measured at Fair Value on a Recurring Basis [Member] | Floating Rate Notes [Member]
Financial Assets [Abstract]
Trading debt securities	1,556	753
Measured at Fair Value on a Recurring Basis [Member] | Asset Backed Securities [Member]
Financial Assets [Abstract]
Trading debt securities	478	526
Measured at Fair Value on a Recurring Basis [Member] | U.S. Treasury Notes [Member]
Financial Assets [Abstract]
Trading debt securities	1,306	1,030
Measured at Fair Value on a Recurring Basis [Member] | Other [Member]
Financial Assets [Abstract]
Trading debt securities	852	968
Measured at Fair Value on a Recurring Basis [Member] | Preferred Stocks [Member]
Financial Assets [Abstract]
Trading equity securities	283	364
Measured at Fair Value on a Recurring Basis [Member] | Supplemental Employee Retirement Plan [Member] | Money Market Fund [Member]
Financial Assets [Abstract]
Trading equity securities	257	124
Measured at Fair Value on a Recurring Basis [Member] | Supplemental Employee Retirement Plan [Member] | Mutual Funds [Member]
Financial Assets [Abstract]
Trading equity securities	5,247	4,839
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member]
Financial Assets [Abstract]
Derivative financial instruments	0
Total financial assets	14,144	12,771
Financial Liabilities [Abstract]
SERP liabilities	0	0
Derivative financial instruments		0
Total financial liabilities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Corporate Bonds [Member]
Financial Assets [Abstract]
Trading debt securities	5,495	5,661
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Municipal Bonds [Member]
Financial Assets [Abstract]
Trading debt securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Floating Rate Notes [Member]
Financial Assets [Abstract]
Trading debt securities	1,556	753
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Asset Backed Securities [Member]
Financial Assets [Abstract]
Trading debt securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | U.S. Treasury Notes [Member]
Financial Assets [Abstract]
Trading debt securities	1,306	1,030
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Other [Member]
Financial Assets [Abstract]
Trading debt securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Preferred Stocks [Member]
Financial Assets [Abstract]
Trading equity securities	283	364
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Supplemental Employee Retirement Plan [Member] | Money Market Fund [Member]
Financial Assets [Abstract]
Trading equity securities	257	124
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member] | Supplemental Employee Retirement Plan [Member] | Mutual Funds [Member]
Financial Assets [Abstract]
Trading equity securities	5,247	4,839
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member]
Financial Assets [Abstract]
Derivative financial instruments	538
Total financial assets	3,390	3,406
Financial Liabilities [Abstract]
SERP liabilities	8,913	8,552
Derivative financial instruments		112
Total financial liabilities	8,913	8,664
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Corporate Bonds [Member]
Financial Assets [Abstract]
Trading debt securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Municipal Bonds [Member]
Financial Assets [Abstract]
Trading debt securities	1,522	1,912
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Floating Rate Notes [Member]
Financial Assets [Abstract]
Trading debt securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Asset Backed Securities [Member]
Financial Assets [Abstract]
Trading debt securities	478	526
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | U.S. Treasury Notes [Member]
Financial Assets [Abstract]
Trading debt securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Other [Member]
Financial Assets [Abstract]
Trading debt securities	852	968
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Preferred Stocks [Member]
Financial Assets [Abstract]
Trading equity securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Supplemental Employee Retirement Plan [Member] | Money Market Fund [Member]
Financial Assets [Abstract]
Trading equity securities	0	0
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member] | Supplemental Employee Retirement Plan [Member] | Mutual Funds [Member]
Financial Assets [Abstract]
Trading equity securities	$ 0	$ 0

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Debt [Abstract]
Current maturities of long-term debt	$ 1,312	$ 2,469
Long-term debt	1,062	$ 1,575
Osborn [Member]
Debt [Abstract]
Amount of credit facility	6,927
Borrowings outstanding	0
Performance bank guarantee, subsidiary obligation to fulfill contracts	$ 1,236
Unused facility fee as a percentage of line of credit	0.75%
Under utilized facility resulting in unused facility fee	50.00%
Available credit under the facility	$ 5,691
Interest rate at period end	9.75%
Astec Brazil Working Capital Loans [Member]
Debt [Abstract]
Loan amount	$ 2,039
Astec Brazil Working Capital Loans [Member] | Minimum [Member]
Debt [Abstract]
Debt instrument, interest rate	10.40%
Debt instrument, maturity date	Nov. 30, 2018
Astec Brazil Working Capital Loans [Member] | Maximum [Member]
Debt [Abstract]
Debt instrument, interest rate	11.00%
Debt instrument, maturity date	Apr. 30, 2024
Astec Brazil Equipment Financing [Member]
Debt [Abstract]
Term loan	5 years
Loan amount	$ 335
Astec Brazil Equipment Financing [Member] | Minimum [Member]
Debt [Abstract]
Debt instrument, interest rate	3.50%
Debt instrument, maturity date	Sep. 30, 2018
Astec Brazil Equipment Financing [Member] | Maximum [Member]
Debt [Abstract]
Debt instrument, interest rate	16.30%
Debt instrument, maturity date	Apr. 30, 2020
Astec Brazil Working Capital Loans and Equipment Financing [Member]
Debt [Abstract]
Current maturities of long-term debt	$ 1,312
Long-term debt	$ 1,062
South American Prime Rate [Member] | Osborn [Member]
Debt [Abstract]
Differential rate (less than prime rate)	0.25%
Wells Fargo [Member]
Debt [Abstract]
Borrowings outstanding	$ 0
Amount of letters of credit outstanding	9,941
Line of credit, additional borrowing capacity	$ 90,059
Term loan	5 years
Maturity date	Apr. 30, 2022
Interest rate at period end	2.85%
Wells Fargo [Member] | Maximum [Member]
Debt [Abstract]
Amount of credit facility	$ 100,000
Sub-limit for letters of credit	30,000
Wells Fargo [Member] | Astec Brazil [Member]
Debt [Abstract]
Contingent liabilities for letters of credit issued on behalf of foreign subsidiaries	$ 3,200
Wells Fargo [Member] | LIBOR [Member]
Debt [Abstract]
Term of variable rate	1 month
Additional rate over base, percentage	0.75%
Unused facility fee as a percentage of line of credit	0.125%

Product Warranty Reserves (Deta

Product Warranty Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Product warranty reserves [Roll Forward]
Reserve balance, beginning of the period	$ 16,013	$ 13,719	$ 15,410	$ 13,156
Warranty liabilities accrued	4,076	4,252	7,529	8,248
Warranty liabilities settled	(3,851)	(3,724)	(6,676)	(7,184)
Pellet plant agreement warranty write-off	(4,806)	0	(4,806)	0
Other	112	22	87	49
Reserve balance, end of the period	$ 11,544	$ 14,269	$ 11,544	$ 14,269
Minimum [Member]
Standard Product Warranty Disclosure [Abstract]
Product warranty reserve term			3 months
Maximum [Member]
Standard Product Warranty Disclosure [Abstract]
Product warranty reserve term			2 years

Accrued Loss Reserves (Details)

Accrued Loss Reserves (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accrued Loss Reserves [Abstract]
Total accrued loss reserves	$ 8,627	$ 8,119
Accrued loss reserves included in other long-term liabilities	$ 6,524	$ 5,615

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Taxes [Abstract]
Effective income tax rate	17.30%	32.80%	10.80%	33.50%
Income tax benefit due to accrual of pellet plant agreement costs	$ (13,847)		$ (13,847)
Increase in liability for uncertain tax positions			$ 7
Federal corporate tax rate	21.00%				35.00%
Provision of income tax expense (benefit)					$ (1,056)
Income tax expense (benefit)					(1,548)
Transition tax					$ 492
Reduction in income tax expense for DPAD				$ (1,127)

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	Jul. 20, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Disaggregation of Revenue [Abstract]
Total net sales		$ 272,528	$ 301,909	$ 597,981	$ 620,310
Contract liability						$ 2,757
Pellet Plant [Member]
Disaggregation of Revenue [Abstract]
Total net sales				143,300
Pellet Plant [Member] | Subsequent Event [Member]
Disaggregation of Revenue [Abstract]
Agreement liability amount expected to pay to customer	$ 68,000
Number of days required for payment agreement amount	120 days
Forgiveness of accounts receivable	$ 7,315
Pellet Plant Agreement Sale Charge [Member]
Disaggregation of Revenue [Abstract]
Total net sales		(75,315)
Domestic [Member]
Disaggregation of Revenue [Abstract]
Total net sales		203,386		473,464
Domestic [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		202,624		388,368
Domestic [Member] | Pellet Plant Agreement Sale Charge [Member]
Disaggregation of Revenue [Abstract]
Total net sales		(75,315)		(75,315)
Domestic [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		59,059		129,321
Domestic [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		5,179		9,529
Domestic [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		2,804		6,007
Domestic [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		6,745		13,923
Domestic [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		2,290		1,631
International [Member]
Disaggregation of Revenue [Abstract]
Total net sales		69,142		124,517
International [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		44,500		77,504
International [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		19,660		37,483
International [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,201		2,326
International [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,874		3,233
International [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,808		3,656
International [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		99		315
Infrastructure Group [Member]
Disaggregation of Revenue [Abstract]
Total net sales		83,202		230,296
Infrastructure Group [Member] | Domestic [Member]
Disaggregation of Revenue [Abstract]
Total net sales		65,072		199,558
Infrastructure Group [Member] | Domestic [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		102,724		188,242
Infrastructure Group [Member] | Domestic [Member] | Pellet Plant Agreement Sale Charge [Member]
Disaggregation of Revenue [Abstract]
Total net sales		(75,315)		(75,315)
Infrastructure Group [Member] | Domestic [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		29,269		70,382
Infrastructure Group [Member] | Domestic [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		3,283		5,211
Infrastructure Group [Member] | Domestic [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,384		3,009
Infrastructure Group [Member] | Domestic [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		3,216		7,254
Infrastructure Group [Member] | Domestic [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		511		775
Infrastructure Group [Member] | International [Member]
Disaggregation of Revenue [Abstract]
Total net sales		18,130		30,738
Infrastructure Group [Member] | International [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		12,040		17,955
Infrastructure Group [Member] | International [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		4,310		9,372
Infrastructure Group [Member] | International [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		644		1,457
Infrastructure Group [Member] | International [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		661		1,164
Infrastructure Group [Member] | International [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		429		683
Infrastructure Group [Member] | International [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		46		107
Aggregate and Mining Group [Member]
Disaggregation of Revenue [Abstract]
Total net sales		116,297		235,364
Aggregate and Mining Group [Member] | Domestic [Member]
Disaggregation of Revenue [Abstract]
Total net sales		78,893		162,730
Aggregate and Mining Group [Member] | Domestic [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		57,989		121,483
Aggregate and Mining Group [Member] | Domestic [Member] | Pellet Plant Agreement Sale Charge [Member]
Disaggregation of Revenue [Abstract]
Total net sales		0		0
Aggregate and Mining Group [Member] | Domestic [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		18,311		36,145
Aggregate and Mining Group [Member] | Domestic [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		564		890
Aggregate and Mining Group [Member] | Domestic [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		652		2,063
Aggregate and Mining Group [Member] | Domestic [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,912		3,720
Aggregate and Mining Group [Member] | Domestic [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		(535)		(1,571)
Aggregate and Mining Group [Member] | International [Member]
Disaggregation of Revenue [Abstract]
Total net sales		37,404		72,634
Aggregate and Mining Group [Member] | International [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		23,385		45,712
Aggregate and Mining Group [Member] | International [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		12,070		22,359
Aggregate and Mining Group [Member] | International [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		328		640
Aggregate and Mining Group [Member] | International [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		630		1,486
Aggregate and Mining Group [Member] | International [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		967		2,297
Aggregate and Mining Group [Member] | International [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		24		140
Energy Group [Member]
Disaggregation of Revenue [Abstract]
Total net sales		73,029		132,321
Energy Group [Member] | Domestic [Member]
Disaggregation of Revenue [Abstract]
Total net sales		59,421		111,176
Energy Group [Member] | Domestic [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		41,911		78,643
Energy Group [Member] | Domestic [Member] | Pellet Plant Agreement Sale Charge [Member]
Disaggregation of Revenue [Abstract]
Total net sales		0		0
Energy Group [Member] | Domestic [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		11,479		22,794
Energy Group [Member] | Domestic [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,332		3,428
Energy Group [Member] | Domestic [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		768		935
Energy Group [Member] | Domestic [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		1,617		2,949
Energy Group [Member] | Domestic [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		2,314		2,427
Energy Group [Member] | International [Member]
Disaggregation of Revenue [Abstract]
Total net sales		13,608		21,145
Energy Group [Member] | International [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		9,075		13,837
Energy Group [Member] | International [Member] | Parts and Component Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		3,280		5,752
Energy Group [Member] | International [Member] | Service and Equipment Installation Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		229		229
Energy Group [Member] | International [Member] | Used Equipment Sales [Member]
Disaggregation of Revenue [Abstract]
Total net sales		583		583
Energy Group [Member] | International [Member] | Freight Revenue [Member]
Disaggregation of Revenue [Abstract]
Total net sales		412		676
Energy Group [Member] | International [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Total net sales		$ 29		$ 68

Segment Information, Segment In

Segment Information, Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)SegmentBusinessunit	Jun. 30, 2017USD ($)
Segment Information [Abstract]
Number of reportable segments | Segment			3
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	$ 272,528	$ 301,909	$ 597,981	$ 620,310
Gross profit (loss)	1,108	65,524	79,113	141,296
Segment profit (loss)	(40,768)	14,359	$ (20,552)	29,439
Infrastructure Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Number of business units | Businessunit			5
Number of business units which design, engineer, manufacture and market product lines | Businessunit			3
Number of business units that operate as Company-owned dealers | Businessunit			2
Net sales	83,202		$ 230,296
Aggregate and Mining Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Number of business units | Businessunit			8
Net sales	116,297		$ 235,364
Energy Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Number of business units | Businessunit			6
Net sales	73,029		$ 132,321
Corporate [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	0	0	0	0
Gross profit (loss)	$ 75	$ 49	$ 223	$ 110
Gross profit (loss) percent	0.00%	0.00%	0.00%	0.00%
Segment profit (loss)	$ 596	$ (10,260)	$ (10,652)	$ (24,689)
Reportable Segments [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	272,528	301,909	597,981	620,310
Gross profit (loss)	$ 1,108	$ 65,524	$ 79,113	$ 141,296
Gross profit (loss) percent	0.40%	21.70%	13.20%	22.80%
Segment profit (loss)	$ (41,113)	$ 14,165	$ (19,788)	$ 29,073
Reportable Segments [Member] | Infrastructure Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	83,202	143,106	230,296	308,349
Gross profit (loss)	$ (47,817)	$ 26,820	$ (14,536)	$ 64,621
Gross profit (loss) percent	(57.50%)	18.70%	(6.30%)	21.00%
Segment profit (loss)	$ (62,734)	$ 9,893	$ (47,882)	$ 28,073
Reportable Segments [Member] | Aggregate and Mining Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	116,297	107,118	235,364	207,731
Gross profit (loss)	$ 29,042	$ 25,791	$ 58,331	$ 50,814
Gross profit (loss) percent	25.00%	24.10%	24.80%	24.50%
Segment profit (loss)	$ 12,548	$ 11,367	$ 25,658	$ 19,795
Reportable Segments [Member] | Energy Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	73,029	51,685	132,321	104,230
Gross profit (loss)	$ 19,808	$ 12,864	$ 35,095	$ 25,751
Gross profit (loss) percent	27.10%	24.90%	26.50%	24.70%
Segment profit (loss)	$ 8,477	$ 3,165	$ 13,088	$ 5,894
Intersegment Eliminations [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	15,196	17,466	32,512	30,518
Segment profit (loss)	345	194	(764)	366
Intersegment Eliminations [Member] | Infrastructure Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	3,370	4,434	11,641	8,459
Intersegment Eliminations [Member] | Aggregate and Mining Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	5,102	6,016	9,008	9,452
Intersegment Eliminations [Member] | Energy Group [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	6,724	7,016	11,863	12,607
Intersegment Eliminations [Member] | Corporate [Member]
Segment reporting, disclosure and reportable segments revenues and profits [Abstract]
Net sales	$ 0	$ 0	$ 0	$ 0

Segment Information, Reconcilia

Segment Information, Reconciliation of Total Segment Profits to Consolidated Totals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of total segment profits (losses) to the Company's consolidated totals [Abstract]
Net income (loss)	$ (40,768)	$ 14,359	$ (20,552)	$ 29,439
Net loss attributable to non-controlling interest in subsidiaries	(94)	(61)	(145)	(101)
Net income (loss) attributable to controlling interest	(40,674)	14,420	(20,407)	29,540
Reportable Segments [Member]
Reconciliation of total segment profits (losses) to the Company's consolidated totals [Abstract]
Net income (loss)	(41,113)	14,165	(19,788)	29,073
Intersegment Recapture (Eliminations) [Member]
Reconciliation of total segment profits (losses) to the Company's consolidated totals [Abstract]
Net income (loss)	$ 345	$ 194	$ (764)	$ 366

Contingent Matters (Details)

Contingent Matters (Details) - USD ($) $ in Thousands	Jul. 20, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Loss Contingency, Estimate [Abstract]
Contingent liability for customer debt		$ 3,213		$ 3,213
Liability recorded related to guarantees		831		831
Revenues from sales contract		272,528	$ 301,909	597,981	$ 620,310
Gross margin		1,108	$ 65,524	79,113	$ 141,296
Inventory value		128,126		128,126		$ 94,571
Pellet Plant Agreement Sale Charge [Member]
Loss Contingency, Estimate [Abstract]
Revenues from sales contract		(75,315)
Gross margin		(71,029)
Pellet Plant [Member]
Loss Contingency, Estimate [Abstract]
Revenues from sales contract				143,300
Gain contingency, unrecorded amount		7,000		7,000
Inventory value		59,521		59,521
Pellet Plant [Member] | Subsequent Event [Member]
Loss Contingency, Estimate [Abstract]
Agreement liability amount expected to pay to customer	$ 68,000
Number of days required for payment agreement amount	120 days
Forgiveness of accounts receivable	$ 7,315
Letter of Credit Wells Fargo [Member]
Loss Contingency, Estimate [Abstract]
Contingent liabilities for letters of credit		9,941		$ 9,941
Letter of credit expiration date				Oct. 31, 2020
Astec Brazil Working Capital Loans [Member]
Loss Contingency, Estimate [Abstract]
Contingent liabilities for letters of credit issued on behalf of foreign subsidiaries		3,200		$ 3,200
Letter of Credit [Member]
Loss Contingency, Estimate [Abstract]
Performance bank guarantee, subsidiary obligations to fulfill contracts		2,998		2,998
Letter of Credit [Member] | Maximum [Member]
Loss Contingency, Estimate [Abstract]
Contingent liabilities for letters of credit		$ 12,939		$ 12,939

Shareholders' Equity (Details)

Shareholders' Equity (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Restricted stock units under the long-term Incentive Plans [Abstract]
Vesting period	5 years
Awards granted in February 2017 and after	3 years
Restricted stock units vested (in shares)	32	30
Shares withheld upon vesting (in shares)	8	8
Vesting date fair value of vested restricted stock units during the period	$ 1,853	$ 1,975
Grant date fair value of restricted stock units	3,553	5,399
Compensation expense	$ 1,019	$ 1,498
Non-Employee Directors Compensation Plan [Member]
Restricted stock units under the long-term Incentive Plans [Abstract]
Vesting period	1 year

Other Income, Net of Expenses47

Other Income, Net of Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income, Net of Expenses [Abstract]
Interest income	$ 239	$ 157	$ 453	$ 332
Gain (loss) on investments	34	14	(69)	41
Insurance recovery	635	0	635	0
Other	144	90	494	400
Total	$ 1,052	$ 261	$ 1,513	$ 773

Derivative Financial Instrume48

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Other Current Assets [Member]
Summary of Derivative Instruments [Abstract]
Derivative assets	$ 538
Other Current Liabilities [Member]
Summary of Derivative Instruments [Abstract]
Derivative liabilities		$ 112
Foreign Exchange Contract [Member]
Summary of Derivative Instruments [Abstract]
Average notional amount	$ 12,020

Derivative Financial Instrume49

Derivative Financial Instruments, Gain (Loss) recognized in income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cost of Sales [Member]
Gain (loss) on derivative financial instruments recognized in income, net [Abstract]
Gain (loss) on derivative financial instruments recognized in income, net	$ 500	$ (42)	$ 687	$ (392)

Business Combination (Details)

Business Combination (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Oct. 31, 2017	Jun. 30, 2018	Dec. 31, 2017
Business Acquisition [Abstract]
Goodwill		$ 45,341	$ 45,732
RexCon Inc. [Member]
Business Acquisition [Abstract]
Date of acquisition		Oct. 1, 2017
Cash purchase price	$ 26,443
Amount held in escrow	3,000
Goodwill	3,488
Other intangible assets	$ 7,778
RexCon Inc. [Member] | Maximum [Member]
Business Acquisition [Abstract]
Period of time for amount held in escrow		18 months
RexCon Inc. [Member] | Noncompete agreements [Member]
Business Acquisition [Abstract]
Useful life of intangible assets		5 years
RexCon Inc. [Member] | Technology [Member]
Business Acquisition [Abstract]
Useful life of intangible assets		19 years
RexCon Inc. [Member] | Trade Names [Member]
Business Acquisition [Abstract]
Useful life of intangible assets		15 years
RexCon Inc. [Member] | Customer Relationships [Member]
Business Acquisition [Abstract]
Useful life of intangible assets		18 years

Subsequent Event (Details)

Subsequent Event (Details)	Jul. 29, 2018USD ($)
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock repurchase program, authorized amount	$ 150,000