Tennant (TNC) 10-Q 2 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2018	Oct. 19, 2018
Entity Information
Entity Registrant Name	Tennant Company
Entity Central Index Key	97,134
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		18,125,000
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Sales	$ 273,255	$ 261,921	$ 838,299	$ 723,771
Cost of Sales	165,170	157,317	500,778	434,877
Gross Profit	108,085	104,604	337,521	288,894
Operating Expense:
Research and Development Expense	7,506	7,907	23,408	24,239
Selling and Administrative Expense	85,140	85,711	269,273	246,993
Total Operating Expense	92,646	93,618	292,681	271,232
Profit from Operations	15,439	10,986	44,840	17,662
Other Income (Expense):
Interest Income	839	698	2,540	1,575
Interest Expense	(5,986)	(6,093)	(17,736)	(18,720)
Net Foreign Currency Transaction Losses	(295)	(842)	(1,381)	(2,375)
Other Expense, Net	(130)	(422)	(890)	(774)
Total Other Expense, Net	(5,572)	(6,659)	(17,467)	(20,294)
Profit (Loss) Before Income Taxes	9,867	4,327	27,373	(2,632)
Income Tax Expense	158	731	1,598	385
Net Earnings (Loss) Including Noncontrolling Interest	9,709	3,596	25,775	(3,017)
Net Earnings (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Net Earnings (Loss) Attributable to Tennant Company	$ 9,676	$ 3,559	$ 25,694	$ (2,989)
Net Earnings (Loss) Attributable to Tennant Company per Share:
Basic	$ 0.54	$ 0.20	$ 1.43	$ (0.17)
Diluted	$ 0.52	$ 0.20	$ 1.40	$ (0.17)
Weighted Average Shares Outstanding:
Basic	17,998,917	17,729,857	17,911,880	17,673,656
Diluted	18,439,621	18,171,444	18,344,813	17,673,656
Cash Dividend Declared per Common Share	$ 0.21	$ 0.21	$ 0.63	$ 0.63

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Earnings (Loss) Including Noncontrolling Interest	$ 9,709	$ 3,596	$ 25,775	$ (3,017)
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	(3,110)	9,033	(14,202)	25,073
Pension and retiree medical benefits	12	379	105	541
Cash flow hedge	(28)	(1,732)	(1,367)	(6,311)
Income Taxes:
Foreign currency translation adjustments	280	0	524	0
Pension and retiree medical benefits	(2)	(138)	(156)	(160)
Cash flow hedge	6	646	(814)	2,354
Total Other Comprehensive (Loss) Income, net of tax	(2,842)	8,188	(15,910)	21,497
Total Comprehensive Income Including Noncontrolling Interest	6,867	11,784	9,865	18,480
Comprehensive Income (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Comprehensive Income Attributable to Tennant Company	$ 6,834	$ 11,747	$ 9,784	$ 18,508

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and Cash Equivalents	$ 53,473	$ 58,398
Restricted Cash	534	653
Accounts Receivable, less allowances of $2,203 and $3,241, respectively	208,119	209,516
Inventories	139,793	127,694
Prepaid Expenses	28,356	19,351
Other Current Assets	8,865	7,503
Total Current Assets	439,140	423,115
Property, Plant and Equipment	381,443	382,768
Accumulated Depreciation	(217,625)	(202,750)
Property, Plant and Equipment, Net	163,818	180,018
Deferred Income Taxes	15,062	11,134
Goodwill	184,619	186,044
Intangible Assets, Net	152,974	172,347
Other Assets	14,953	21,319
Total Assets	970,566	993,977
Current Liabilities:
Current Portion of Long-Term Debt	30,999	30,883
Accounts Payable	90,778	96,082
Employee Compensation and Benefits	42,157	37,257
Income Taxes Payable	2,972	2,838
Other Current Liabilities	71,842	69,447
Total Current Liabilities	238,748	236,507
Long-Term Liabilities:
Long-Term Debt	316,937	345,956
Employee-Related Benefits	21,828	23,867
Deferred Income Taxes	48,491	53,225
Other Liabilities	35,479	35,948
Total Long-Term Liabilities	422,735	458,996
Total Liabilities	661,483	695,503
Commitments and Contingencies (Note 13)
Equity:
Common Stock, $0.375 par value; 60,000,000 shares authorized; 18,122,576 and 17,881,177 shares issued and outstanding, respectively	6,796	6,705
Additional Paid-In Capital	26,087	15,089
Retained Earnings	312,539	297,032
Accumulated Other Comprehensive Loss	(38,233)	(22,323)
Total Tennant Company Shareholders' Equity	307,189	296,503
Noncontrolling Interest	1,894	1,971
Total Equity	309,083	298,474
Total Liabilities and Total Equity	$ 970,566	$ 993,977

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Allowance For Doubtful Receivables And Sales Returns	$ 2,203	$ 3,241
Equity:
Common Stock, par value per share	$ 0.375	$ 0.375
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	18,122,576	17,881,177
Common Stock, shares outstanding	18,122,576	17,881,177

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net Earnings (Loss) Including Noncontrolling Interest	$ 25,775	$ (3,017)
Adjustments to reconcile Net Earnings (Loss) to Net Cash Provided by Operating Activities:
Depreciation	24,090	18,515
Amortization of Intangible Assets	17,378	11,430
Amortization of Debt Issuance Costs	1,883	896
Debt Issuance Cost Charges Related to Short-Term Financing	0	6,200
Fair Value Step-Up Adjustment to Acquired Inventory	0	8,445
Deferred Income Taxes	(9,908)	(4,848)
Share-Based Compensation Expense	6,008	4,915
Allowance for Doubtful Accounts and Returns	835	983
Other, Net	(459)	175
Changes in Operating Assets and Liabilities, Net of Assets Acquired:
Receivables, Net	(342)	(524)
Inventories	(19,550)	(9,866)
Accounts Payable	(1,756)	5,747
Employee Compensation and Benefits	5,186	(9,462)
Other Current Liabilities	(138)	10,019
Income Taxes	(1,105)	4,149
Other Assets and Liabilities	(4,428)	(11,634)
Net Cash Provided by Operating Activities	43,469	32,123
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(12,768)	(16,239)
Proceeds from Disposals of Property, Plant and Equipment	108	2,456
Proceeds from Principal Payments Received on Long-Term Note Receivable	828	500
Issuance of Long-Term Note Receivable	0	(1,500)
Proceeds from Sale of Business	4,000	0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired	0	(353,535)
Purchase of Intangible Assets	(2,607)	(2,500)
Net Cash Used in Investing Activities	(10,439)	(370,818)
FINANCING ACTIVITIES
Proceeds from Short-Term Debt	0	300,000
Repayments of Short-Term Debt	0	(300,000)
Proceeds from Issuance of Long-term Debt	0	440,000
Payments of Long-term Debt	(30,216)	(81,262)
Payments of Debt Issuance Costs	0	(16,465)
Change in Capital Lease Obligations	7	0
Proceeds from Issuance of Common Stock	5,735	4,728
Dividends Paid	(11,356)	(11,204)
Net Cash (Used in) Provided by Financing Activities	(35,830)	335,797
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	(2,244)	1,587
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(5,044)	(1,311)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	59,051	58,550
Cash, Cash Equivalents and Restricted Cash at End of Period	54,007	57,239
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Income Taxes	7,314	8,127
Cash Paid for Interest	11,297	3,741
Supplemental Non-cash Investing and Financing Activities:
Capital Expenditures in Accounts Payable	$ 635	$ 1,265

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Basis of Presentation – The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the Securities and Exchange Commission (“SEC”) requirements for interim reporting, which allows certain footnotes and other financial information normally required by accounting principles generally accepted in the United States of America to be condensed or omitted. In our opinion, the Condensed Consolidated Financial Statements contain all adjustments (consisting of only normal recurring adjustments) necessary for the fair presentation of our financial position and results of operations. These statements should be read in conjunction with the Consolidated Financial Statements and Notes included in our annual report on Form 10-K for the year ended December 31, 2017 . The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. Revenue Recognition – Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products and services. Generally, these criteria are met at the time the product is shipped. We also enter into contracts that can include combinations of products and services, which are generally capable of being distinct and are accounted for as separate performance obligations. Revenue is recognized net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities. Further details regarding revenue recognition are discussed in Notes 2 and 3. New Accounting Pronouncements – Further details regarding the adoption of new accounting standards are discussed in Note 2. We documented the summary of significant accounting policies in the Notes to the Consolidated Financial Statements of our annual report on Form 10-K for the fiscal year ended December 31, 2017 . Other than the accounting policies noted above, there have been no material changes to our accounting policies since the filing of that report.

Newly Adopted Accounting Pronou

Newly Adopted Accounting Pronouncements (Notes)	9 Months Ended
	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	2. Newly Adopted Accounting Pronouncements Revenue from Contracts with Customers On January 1, 2018, we adopted Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) and all the related amendments (“new revenue standard”) to all contracts not completed at the date of initial application using the modified retrospective method. The cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings was not material to the company. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods, and there are no material differences between the reported results under the new revenue standard and those that would have been reported under legacy U.S. GAAP. The new revenue standard also required us to record a refund liability and a corresponding asset for our right to recover products from customers upon settling the refund liability to account for the transfer of products with a right of return. The impact of this provision of the new revenue standard is immaterial to our financial statements. The new revenue standard also provided additional clarity that resulted in a reclassification from Accounts Receivable to Other Current Liabilities to reflect a change in the presentation of our sales return reserves on the balance sheet, which were previously recorded net of Accounts Receivable. Provisions for estimated sales returns will continue to be recorded at the time the related revenue is recognized. The reclassification from Accounts Receivable to Other Current Liabilities in accordance with the detail described above impacted the Condensed Consolidated Balance Sheet as of September 30, 2018 , as follows (in thousands): As Reported Balances Without Adoption of ASC 606 Effect of Change Higher/(Lower) ASSETS Accounts Receivable $ 208,119 $ 206,960 $ 1,159 Total Current Assets 439,140 437,981 1,159 Total Assets $ 970,566 $ 969,407 $ 1,159 LIABILITIES Other Current Liabilities $ 71,842 $ 70,683 $ 1,159 Total Current Liabilities 238,748 237,589 1,159 Total Liabilities $ 661,483 $ 660,324 $ 1,159 For additional disclosures regarding the new revenue standard, see Note 3. Intra-Entity Transfers of Assets Other than Inventory On January 1, 2018, we adopted ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other than Inventory . The ASU requires the tax effects of all intra-entity sales of assets other than inventory to be recognized in the period in which the transaction occurs. The adoption of this ASU resulted in a $94 cumulative effect adjustment recorded in Retained Earnings as of the beginning of 2018 that reflects a $1,281 reduction in a long-term deferred charge, mostly offset by the establishment of a deferred tax asset of $1,187 . The reduction in the long-term asset and establishment of the deferred tax asset impacted Other Assets and Deferred Income Taxes, respectively, on our Condensed Consolidated Balance Sheets. Statement of Cash Flows – Restricted Cash On January 1, 2018, we adopted ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash . The ASU requires companies to explain the changes in the combined total of restricted and unrestricted balances in the Condensed Consolidated Statements of cash flows. Therefore, amounts generally described as restricted cash or restricted cash equivalents should be combined with unrestricted cash and cash equivalents when reconciling the beginning and end of period balances on the Condensed Consolidated Statements of Cash Flows. In accordance with the ASU, we adopted the standard on a retrospective basis to all periods presented. Compensation – Retirement Benefits On January 1, 2018, we adopted ASU No. 2017-07, Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . The ASU requires employers to report the service cost component of net pension and postretirement benefit costs in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net pension and postretirement benefit costs are required to be presented in the Condensed Consolidated Statements of Operations separately from the service cost component in nonoperating expenses. In accordance with the ASU, we adopted the standard on a retrospective basis to all periods presented. As a result, we reclassified $60 of net benefit credits and $74 of net benefit costs from Selling and Administrative Expense to Other Expense, Net on the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2017 , respectively. The reclassification represents the other components of net pension and postretirement benefit costs that are now presented in the Condensed Consolidated Statements of Operations separately from the service cost in Total Other Expense, Net. As a basis for the retrospective application of the ASU, we used the practical expedient that permits us to use the amounts disclosed for the various components of net benefit cost in Note 12. Income Statement—Reporting Comprehensive Income On January 1, 2018, we elected to adopt early ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220) . The ASU gives companies the option to reclassify stranded tax effects caused by the newly enacted legislation referred to as the Tax Cuts and Jobs Act (the "Tax Act") from Accumulated Other Comprehensive Loss to Retained Earnings. The adoption resulted in a $1,263 cumulative effect adjustment which increased Retained Earnings as of the beginning of 2018 and reduced the deferred income tax benefits in Accumulated Other Comprehensive Loss relating to cash flow hedges and pension and retiree medical benefits. Income Taxes In March 2018, we adopted ASU No. 2018-05, Income Taxes (Topic 740): Amendments to SEC paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118. The ASU updates the income tax accounting in U.S. GAAP to reflect the SEC interpretive guidance released on December 22, 2017, when the Tax Act was signed into law. Additional information regarding the adoption of this standard is contained in Note 15.

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Notes)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customer [Text Block]	3. Revenue from Contracts with Customers Under the new revenue standard, revenue is recognized when control transfers under the terms of the contract with our customers. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Sales and other taxes we collect concurrent with revenue-producing activities are excluded from revenue. We do not account for shipping and handling as a distinct performance obligation as we generally perform shipping and handling activities after we transfer control of goods to the customer. We have elected to account for shipping and handling costs associated with outbound freight after control of goods has transferred to a customer as a fulfillment cost. Incidental items that are immaterial in the context of the contract are not recognized as a separate performance obligation. We do not have any significantly extended payment terms as payment is generally received within one year of the point of sale. In general, we transfer control and recognize a sale at the point in time when products are shipped from our manufacturing facilities both direct to consumers and to distributors. Service revenue is recognized in the period the service is performed or ratably over the period of the related service contract. Consideration related to service contracts is deferred if the proceeds are received in advance of the satisfaction of the performance obligations and recognized over the contract period as the performance obligation is met. We use an output method to measure progress toward completion for certain prepaid service contracts, as this method appropriately depicts performance towards satisfaction of the performance obligations. For contracts with multiple performance obligations (i.e., a product and service component), we allocate the transaction price to the performance obligations in proportion to their stand-alone selling prices. We use an observable price to determine the stand-alone selling price for separate performance obligations. When allocating on a relative stand-alone selling price basis, any discounts contained within the contract are allocated proportionately to all of the performance obligations in the contract. Disaggregation of Revenue The following tables illustrate the disaggregation of revenue by geographic area, groups of similar products and services and sales channels for the three and nine months ended September 30, 2018 and 2017 (in thousands): Net Sales by geographic area Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Americas $ 175,341 $ 161,037 $ 516,731 $ 472,953 Europe, Middle East and Africa 74,254 78,851 250,480 189,483 Asia Pacific 23,660 22,033 71,088 61,335 Total $ 273,255 $ 261,921 $ 838,299 $ 723,771 Net Sales are attributed to each geographic area based on the end user country and are net of intercompany sales. Net Sales by groups of similar products and services Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Equipment $ 178,165 $ 165,203 $ 542,317 $ 455,311 Parts and Consumables 53,639 53,535 168,491 149,260 Specialty Surface Coatings 7,139 8,007 21,434 22,491 Service and Other 34,312 35,176 106,057 96,709 Total $ 273,255 $ 261,921 $ 838,299 $ 723,771 Net Sales by sales channel Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Sales Direct to Consumer $ 180,901 $ 172,484 $ 547,079 $ 490,533 Sales to Distributors 92,354 89,437 291,220 233,238 Total $ 273,255 $ 261,921 $ 838,299 $ 723,771 Contract Liabilities Sales Returns The right of return may exist explicitly or implicitly with our customers. When the right of return exists, we adjust the transaction price for the estimated effect of returns. We estimate the expected returns using the expected value method by assessing historical sales levels and the timing and magnitude of historical sales return levels as a percent of sales and projecting this experience into the future. Sales Incentives Our sales contracts may contain various customer incentives, such as volume-based rebates or other promotions. We reduce the transaction price for certain customer programs and incentive offerings that represent variable consideration. Sales incentives given to our customers are recorded using the most likely amount approach for estimating the amount of consideration to which the company will be entitled. We forecast the most likely amount of the incentive to be paid at the time of sale, update this forecast quarterly, and adjust the transaction price accordingly to reflect the new amount of incentives expected to be earned by the customer. A majority of our customer incentives are settled within one year. We record our accruals for volume-based rebates and other promotions in Other Current Liabilities on our Condensed Consolidated Balance Sheets. The change in our sales incentive accrual balance for the nine months ended September 30, 2018 was as follows: Nine Months Ended September 30 2018 Beginning balance $ 13,466 Additions to sales incentive accrual 22,078 Contract payments (21,677 ) Foreign currency fluctuations (239 ) Ending balance $ 13,628 Deferred Revenue We sell separately priced prepaid contracts to our customers where we receive payment at the inception of the contract and defer recognition of the consideration received because we have to satisfy future performance obligations. Our deferred revenue balance is primarily attributed to prepaid maintenance contracts on our machines ranging from 12 months to 60 months . In circumstances where prepaid contracts are bundled with machines, we use an observable price to determine stand-alone selling price for separate performance obligations. The change in the deferred revenue balance for the nine months ended September 30, 2018 was as follows: Nine Months Ended September 30 2018 Beginning balance $ 7,787 Increase in deferred revenue representing our obligation to satisfy future performance obligations 11,032 Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations (10,475 ) Foreign currency fluctuations (140 ) Ending balance $ 8,204 At September 30, 2018 , $5,064 and $3,140 of deferred revenue was reported in Other Current Liabilities and Other Liabilities, respectively, on our Condensed Consolidated Balance Sheets. Of this, we expect to recognize the following approximate amounts in Net Sales in the following periods: Remaining 2018 $ 2,502 2019 2,958 2020 1,595 2021 692 2022 381 Thereafter 76 Total $ 8,204 At December 31, 2017, $5,304 and $2,483 of deferred revenue was reported in Other Current Liabilities and Other Liabilities, respectively, on our Condensed Consolidated Balance Sheets. Practical Expedients and Exemptions We generally expense the incremental costs of obtaining a contract when incurred because the amortization period would be less than one year. These costs relate primarily to sales commissions and are recorded in Selling and Administrative Expense in the Condensed Consolidated Statements of Operations. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less. In addition, we do not adjust the promised amount of consideration for the effects of a significant financing component if we expect, at contract inception, that the period between when we transfer a promised good or service to a customer and when the customer pays for that good or service will be one year or less.

Management Actions

Management Actions	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Management Actions	4. Management Actions During the first quarter of 2017 , we implemented a restructuring action to better align our global resources and expense structure with a lower growth global economic environment. The pre-tax charge of $8,018 , including other associated costs of $961 , consisted primarily of severance and was included within Selling and Administrative Expense in the Condensed Consolidated Statements of Operations. The charge impacted our Americas, Europe, Middle East and Africa (EMEA) and Asia Pacific (APAC) operating segments. The savings offset the pre-tax charge approximately one year from the date of the action. Additional costs will not be incurred related to this restructuring action. During the fourth quarter of 2017 , we implemented a restructuring action primarily driven by integration actions related to our acquisition of the IPC Group. The restructuring action consisted primarily of severance and included reductions in overall staffing to streamline and right-size the organization to support anticipated business requirements. The pre-tax charge of $2,501 was included within Selling and Administrative Expense in the Condensed Consolidated Statements of Operations. The charge impacted our Americas, EMEA and APAC operating segments. We believe the anticipated savings will offset the pre-tax charge in approximately one year from the date of the action. Additional costs will not be incurred related to this restructuring action. A reconciliation of the beginning and ending liability balances is as follows: Severance and Related Costs 2017 restructuring actions $ 9,558 Cash payments (6,312 ) Foreign currency adjustments 190 December 31, 2017 balance $ 3,436 2018 utilization: Cash payments (1,694 ) Foreign currency adjustments (64 ) September 30, 2018 balance $ 1,678

Acquisitions and Divestitures (

Acquisitions and Divestitures (Notes)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions and Divestitures	5. Acquisitions and Divestitures On September 4, 2018, we signed a definitive agreement to acquire Hefei Gaomei Cleaning Machines Co., Ltd. and Anhui Rongen Environmental Protection Technology Co., Ltd (collectively "Gaomei") , privately held designers and manufacturers of commercial cleaning solutions based in China. We expect the acquisition to be completed in the first quarter of 2019. The purchase price and net assets to be acquired are not significant to our consolidated financial statements. During the third quarter of 2018, we sold our Waterstar business for $4,000 in cash. The resulting gain was approximately $1,000 and is reflected within Selling and Administrative Expense in operating profit in our Condensed Consolidated Statements of Operations. On April 6, 2017, we acquired the outstanding capital stock of IP Cleaning S.p.A. and its subsidiaries ("IPC Group") for a purchase price of $353,769 , net of cash acquired of $8,804 . The primary seller was Ambienta SGR S.p.A., a European private equity fund. IPC Group, based in Italy, is a designer and manufacturer of innovative professional cleaning equipment, cleaning tools and supplies. The acquisition strengthens our presence and market share in Europe and allows us to better leverage our EMEA cost structure. We funded the acquisition of IPC Group, along with related fees, including refinancing of existing debt, with funds raised through borrowings under a senior secured credit facility in an aggregate principal amount of $420,000 . Further details regarding our acquisition financing arrangements are discussed in Note 8. The following table summarizes the final fair value measurement of the assets acquired and liabilities assumed as of the date of acquisition: ASSETS Receivables $ 39,984 Inventories 46,442 Other Current Assets 7,456 Assets Held for Sale 2,247 Property, Plant and Equipment 63,890 Intangible Assets Subject to Amortization: Trade Name 26,753 Customer Lists 123,061 Technology 9,631 Other Assets 2,000 Total Identifiable Assets Acquired 321,464 LIABILITIES Accounts Payable 32,227 Accrued Expenses 18,130 Deferred Income Taxes 56,950 Other Liabilities 10,964 Total Identifiable Liabilities Assumed 118,271 Net Identifiable Assets Acquired 203,193 Noncontrolling Interest (1,896 ) Goodwill 152,472 Total Purchase Price, net of Cash Acquired $ 353,769 Based on the final fair value measurement of the assets acquired and liabilities assumed, we allocated $152,472 to goodwill for the expected synergies from combining IPC Group with our existing business. None of the goodwill is expected to be deductible for income tax purposes. In connection with the finalization of the fair value measurements in the first quarter of 2018, we recorded a measurement period adjustment, which increased goodwill by $4,627 with offsetting adjustments to various income tax assets and liabilities. The final fair value of the acquired intangible assets is $159,445 . The expected lives of the acquired amortizable intangible assets are approximately 15 years for customer lists, 10 years for trade names and 10 years for technology. Trade names are being amortized on a straight-line basis while the customer lists and technology are being amortized on an accelerated basis. We recorded amortization expense of $5,401 and $16,424 in Selling and Administrative Expense on our Condensed Consolidated Statements of Operations for these acquired intangible assets for the three and nine months ended September 30, 2018 , respectively. The following unaudited pro forma financial information presents the combined results of operations of Tennant Company as if the 2017 acquisition of the IPC Group had occurred as of January 1, 2016. The unaudited pro forma financial information is presented for informational purposes only. It is not necessarily indicative of what our consolidated results of operations actually would have been had the acquisition occurred at the beginning of fiscal 2016. No pro forma results are presented for the three or nine months ended September 30, 2018 , as the results of the acquired company are included in the actual results. Pro Forma Financial Information (Unaudited) Three Months Ended Nine Months Ended (In thousands, except per share data) September 30 September 30 2017 2017 Net Sales Pro forma $ 261,921 $ 777,832 As reported 261,921 723,771 Net Earnings (Loss) Attributable to Tennant Company Pro forma $ 5,800 $ 14,875 As reported 3,559 (2,989 ) Net Earnings (Loss) Attributable to Tennant Company per Share Pro forma $ 0.32 $ 0.84 As reported 0.20 (0.17 ) The unaudited pro forma financial information above gives effect to the following: • incremental depreciation and amortization expense related to the fair value of the property, plant and equipment and identified intangible assets; • exclusion of the purchase accounting impact of the inventory step-up related to the sale of acquired inventory; • incremental interest expense related to additional debt used to finance the acquisition; • exclusion of non-recurring acquisition-related transaction and financing costs; and • pro forma adjustments tax affected based on the jurisdiction where the costs were incurred.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Inventories	6. Inventories Inventories are valued at the lower of cost or market. Inventories at September 30, 2018 and December 31, 2017 consisted of the following: September 30, December 31, Inventories carried at LIFO: Finished goods $ 48,471 $ 43,439 Raw materials, production parts and work-in-process 28,994 23,694 LIFO reserve (30,668 ) (28,429 ) Total LIFO inventories 46,797 38,704 Inventories carried at FIFO: Finished goods 53,138 54,161 Raw materials, production parts and work-in-process 39,858 34,829 Total FIFO inventories 92,996 88,990 Total inventories $ 139,793 $ 127,694 The LIFO reserve approximates the difference between LIFO carrying cost and FIFO.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	7. Goodwill and Intangible Assets The changes in the carrying value of Goodwill for the nine months ended September 30, 2018 were as follows: Goodwill Accumulated Impairment Losses Total Balance as of December 31, 2017 $ 227,224 $ (41,180 ) $ 186,044 Purchase accounting adjustments 4,627 — 4,627 Foreign currency fluctuations (7,542 ) 1,490 (6,052 ) Balance as of September 30, 2018 $ 224,309 $ (39,690 ) $ 184,619 The balances of acquired Intangible Assets, excluding Goodwill, as of September 30, 2018 and December 31, 2017 , were as follows: Customer Lists Trade Names Technology Total Balance as of September 30, 2018 Original cost $ 144,760 $ 30,945 $ 17,134 $ 192,839 Accumulated amortization (29,908 ) (4,631 ) (5,326 ) (39,865 ) Carrying value $ 114,852 $ 26,314 $ 11,808 $ 152,974 Weighted average original life (in years) 15 10 11 Balance as of December 31, 2017 Original cost $ 149,355 $ 31,968 $ 14,589 $ 195,912 Accumulated amortization (17,870 ) (2,436 ) (3,259 ) (23,565 ) Carrying value $ 131,485 $ 29,532 $ 11,330 $ 172,347 Weighted average original life (in years) 15 10 11 The purchase accounting adjustments recorded during the first quarter of 2018 were based on the fair value adjustments related to our acquisition of the IPC Group, as described further in Note 5. During the first nine months of 2018 , we purchased a technology license for $2,500 . The license was recorded in Intangible Assets, Net as technology on the Condensed Consolidated Balance Sheets as of September 30, 2018 . Amortization expense on Intangible Assets for the three and nine months ended September 30, 2018 was $5,720 and $17,378 , respectively. Amortization expense on Intangible Assets for the three and nine months ended September 30, 2017 was $7,650 and $11,430 , respectively. Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows: Remaining 2018 $ 5,456 2019 21,268 2020 19,827 2021 18,244 2022 15,965 Thereafter 72,214 Total $ 152,974

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	8. Debt Financial Covenants In 2017, the Company and certain of our foreign subsidiaries entered into a Credit Agreement (the "2017 Credit Agreement) with JPMorgan, as administrative agent, Goldman Sachs Bank USA, as syndication agent, Wells Fargo, National Association, U.S. Bank National Association, and HSBC Bank USA, National Association, as co-documentation agents, and the lenders (including JPMorgan) from time to time party thereto. The 2017 Credit Agreement contains customary representations, warranties and covenants, including, but not limited to, covenants restricting the company’s ability to incur indebtedness and liens and merge or consolidate with another entity. The 2017 Credit Agreement also contains financial covenants, requiring us to maintain a ratio of consolidated total indebtedness to consolidated earnings before income, taxes, depreciation and amortization, subject to certain adjustments ("Adjusted EBITDA") of not greater than 4.00 to 1, as well as requiring us to maintain a ratio of consolidated Adjusted EBITDA to consolidated interest expense of no less than 3.50 to 1 for the quarter ended September 30, 2018 . The 2017 Credit Agreement also contains a financial covenant requiring us to maintain a senior secured net indebtedness to Adjusted EBITDA ratio of not greater than 3.50 to 1. These financial covenants may restrict our ability to pay dividends and purchase outstanding shares of our common stock. We were in compliance with our financial covenants at September 30, 2018 . We will be required to repay the senior credit agreement with 25% to 50% of our excess cash flow from the preceding fiscal year, as defined in the agreement, unless our net leverage ratio for such preceding fiscal year is less than or equal to 3.00 to 1, which will be first measured using our fiscal year ended December 31, 2018. Our Senior Notes also contain certain restrictions, which are generally less restrictive than those contained in the 2017 Credit Agreement. Registration Rights Agreement In connection with the issuance and sale of the Senior Notes, the company entered into a Registration Rights Agreement, dated April 18, 2017, among the company, the Guarantors and Goldman, Sachs & Co. and J.P. Morgan Securities LLC (the “Registration Rights Agreement”). Pursuant to the Registration Rights Agreement, the company agreed (1) to use its commercially reasonable efforts to consummate an exchange offer to exchange the Senior Notes for new registered notes (the “Exchange Notes”), with terms substantially identical in all material respects with the Senior Notes (except that the Exchange Notes will not contain terms with respect to additional interest, registration rights or transfer restrictions) and (2) if required, to have a shelf registration statement declared effective with respect to resales of the Senior Notes. On January 22, 2018, we commenced the exchange offer required by the Registration Rights Agreement. The exchange offer closed on February 23, 2018. We did not incur any additional indebtedness as a result of the exchange offer. As a result, we are not required to pay additional interest on the Senior Notes. Debt Outstanding Debt outstanding at September 30, 2018 and December 31, 2017 consisted of the following: September 30, December 31, Long-Term Debt: Senior unsecured notes $ 300,000 $ 300,000 Credit facility borrowings 50,000 80,000 Capital lease obligations 2,955 3,279 Total Long-Term Debt 352,955 383,279 Less: unamortized debt issuance costs (5,020 ) (6,440 ) Less: current maturities of credit facility borrowings, net of debt issuance costs (1) (29,704 ) (29,413 ) Less: current maturities of capital lease obligations (1) (1,294 ) (1,470 ) Long-term portion $ 316,937 $ 345,956 (1) Current maturities of long-term debt include $30,000 of current maturities, less $296 of unamortized debt issuance costs, under our 2017 Credit Agreement and $1,294 of current maturities of capital lease obligations. As of September 30, 2018 , we had outstanding borrowings under our Senior Unsecured Notes of $300,000 . We had outstanding borrowings under our 2017 Credit Agreement, totaling $30,000 under our term loan facility and $20,000 under our revolving facility, leaving $180,000 of unused borrowing capacity on our revolving facility. Although we are only required to make a minimum principal payment of $6,250 during the next year, we have both the intent and the ability to pay an additional $23,750 during the next year on our term loan facility. As such, we have classified $30,000 as current maturities of long-term debt. In addition, we had letters of credit and bank guarantees outstanding in the amount of $5,724 , leaving approximately $174,276 of unused borrowing capacity on our revolving facility. Commitment fees on unused lines of credit for the nine months ended September 30, 2018 were $455 . The overall weighted average cost of debt is approximately 5.4% and net of a related cross-currency swap instrument is approximately 4.5% . Further details regarding the cross-currency swap instrument are discussed in Note 10.

Warranty

Warranty	9 Months Ended
	Sep. 30, 2018
Product Warranties Disclosures [Abstract]
Warranty	9. Warranty We record a liability for warranty claims at the time of sale. The amount of the liability is based on the trend in the historical ratio of claims to sales, the historical length of time between the sale and resulting warranty claim, new product introductions and other factors. Warranty terms on machines generally range from one to four years. However, the majority of our claims are paid out within the first six to nine months following a sale. The majority of the liability for estimated warranty claims represents amounts to be paid out in the near term for qualified warranty issues, with immaterial amounts reserved to be paid for older equipment warranty issues. The changes in warranty reserves for the nine months ended September 30, 2018 and 2017 were as follows: Nine Months Ended September 30 2018 2017 Beginning balance $ 12,676 $ 10,960 Additions charged to expense 10,883 8,879 Acquired warranty obligations — 384 Foreign currency fluctuations (193 ) 225 Claims paid (9,805 ) (8,912 ) Ending balance $ 13,561 $ 11,536

Derivatives (Notes)

Derivatives (Notes)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	10. Derivatives Hedge Accounting and Hedging Programs We recognize all derivative instruments as either assets or liabilities in our Condensed Consolidated Balance Sheets and measure them at fair value. Gains and losses resulting from changes in fair value are accounted for depending on the use of the derivative and whether it is designated and qualifies for hedge accounting. Balance Sheet Hedging Hedges of Foreign Currency Assets and Liabilities We hedge portions of our net recognized foreign currency denominated assets and liabilities with foreign exchange forward contracts to reduce the risk that the value of these assets and liabilities will be adversely affected by changes in exchange rates. At September 30, 2018 and December 31, 2017 , the notional amounts of foreign currency forward exchange contracts outstanding not designated as hedging instruments were $47,614 and $60,858 , respectively. Cash Flow Hedging Hedges of Forecasted Foreign Currency Transactions In countries outside the U.S., we transact business in U.S. dollars and in various other currencies. We may use foreign exchange option contracts or forward contracts to hedge certain cash flow exposures resulting from changes in these foreign currency exchange rates. These foreign exchange contracts, carried at fair value, have maturities of up to one year . We enter into these foreign exchange contracts to hedge a portion of our forecasted foreign currency denominated revenue in the normal course of business, and accordingly, they are not speculative in nature. The notional amounts of outstanding foreign currency forward contracts designated as cash flow hedges were $2,952 and $2,928 as of September 30, 2018 and December 31, 2017 , respectively. The notional amounts of outstanding foreign currency option contracts designated as cash flow hedges were $8,737 and $8,619 as of September 30, 2018 and December 31, 2017 , respectively. Foreign Currency Derivatives We use foreign currency exchange rate derivatives to hedge our exposure to fluctuations in exchange rates for anticipated intercompany cash transactions between Tennant Company and its subsidiaries. We entered into Euro to U.S. dollar foreign exchange cross currency swaps for all of the anticipated cash flows associated with an intercompany loan from a wholly owned European subsidiary. We enter into these foreign exchange cross currency swaps to hedge the foreign currency denominated cash flows associated with this intercompany loan, and accordingly, they are not speculative in nature. These cross currency swaps are designated as cash flow hedges. The hedged cash flows as of September 30, 2018 and December 31, 2017 included €175,800 and €181,200 of total notional values, respectively. As of September 30, 2018 , the aggregate scheduled interest payments over the course of the loan and related swaps amounted to €25,800 . The scheduled maturity and principal payment of the loan and related swaps of €150,000 are due in April 2022. The fair value of derivative instruments on our Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017 was as follows: September 30, 2018 December 31, 2017 Fair Value Asset Derivatives Fair Value Liability Derivatives Fair Value Asset Derivatives Fair Value Liability Derivatives Derivatives designated as hedging instruments: Foreign currency option contracts (1) $ 113 $ — $ 86 $ — Foreign currency forward contracts (1) 7,038 29,868 7,218 34,961 Derivatives not designated as hedging instruments: Foreign currency forward contracts (1) $ 653 $ 358 $ 442 $ 425 (1) Contracts that mature within the next 12 months are included in Other Current Assets and Other Current Liabilities for asset derivatives and liability derivatives, respectively, on our Condensed Consolidated Balance Sheets. Contracts with maturities greater than 12 months are included in Other Assets and Other Liabilities for asset derivatives and liability derivatives, respectively, in our Condensed Consolidated Balance Sheets. Amounts included in our Condensed Consolidated Balance Sheets are recorded net where a right of offset exists with the same derivative counterparty. As of September 30, 2018 , we anticipate reclassifying approximately $2,129 of gains from Accumulated Other Comprehensive Loss to net earnings during the next 12 months. The effect of foreign currency derivative instruments designated as cash flow hedges and of foreign currency derivative instruments not designated as hedges in our Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2018 was as follows: Three Months Ended Nine Months Ended September 30, 2018 September 30, 2018 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax (1) $ (89 ) $ 1,253 $ (40 ) $ 4,929 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales (7 ) (33 ) (91 ) (34 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 487 — 1,345 Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses — 739 — 4,724 Net (loss) gain recognized in earnings (2) (5 ) 2 3 8 Derivatives not designated as hedging instruments: Net (loss) gain recognized in earnings (3) $ — $ (658 ) $ — $ 1,174 The effect of foreign currency derivative instruments designated as cash flow hedges and of foreign currency derivative instruments not designated as hedges in our Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2017 was as follows: Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net loss recognized in Other Comprehensive (Loss) Income, net of tax (1) $ (40 ) $ (4,492 ) $ (177 ) $ (14,026 ) Net (loss) gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales (141 ) 26 (140 ) (76 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 374 — 823 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses — (3,705 ) — (10,853 ) Net (loss) gain recognized in earnings (2) (7 ) 3 (12 ) 8 Derivatives not designated as hedging instruments: Net loss recognized in earnings (3) $ — $ (2,062 ) $ (1,132 ) $ (7,369 ) (1) Net change in the fair value of the effective portion classified in Other Comprehensive (Loss) Income. (2) Ineffective portion and amount excluded from effectiveness testing classified in Net Foreign Currency Transaction Losses. (3) Classified in Net Foreign Currency Transaction Losses.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	11. Fair Value Measurements Estimates of fair value for financial assets and financial liabilities are based on the framework established in the accounting guidance for fair value measurements. The framework defines fair value, provides guidance for measuring fair value and requires certain disclosures. The framework discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The framework utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels: • Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. • Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. • Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions. Our population of assets and liabilities subject to fair value measurements at September 30, 2018 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 7,691 $ — $ 7,691 $ — Foreign currency option contracts 113 — 113 — Total Assets $ 7,804 $ — $ 7,804 $ — Liabilities: Foreign currency forward exchange contracts $ 30,226 $ — $ 30,226 $ — Total Liabilities $ 30,226 $ — $ 30,226 $ — Our population of assets and liabilities subject to fair value measurements at December 31, 2017 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 7,660 $ — $ 7,660 $ — Foreign currency option contracts 86 — 86 — Total Assets $ 7,746 $ — $ 7,746 $ — Liabilities: Foreign currency forward exchange contracts $ 35,386 $ — $ 35,386 $ — Total Liabilities $ 35,386 $ — $ 35,386 $ — Our foreign currency forward exchange and option contracts are valued using observable Level 2 market expectations at the measurement date and standard valuation techniques to convert future amounts to a single present value amount. Further details regarding our foreign currency forward exchange and option contracts are discussed in Note 10. The carrying amounts reported in the Condensed Consolidated Balance Sheets for Cash and Cash Equivalents, Restricted Cash, Accounts Receivable, Other Current Assets, Accounts Payable and Other Current Liabilities approximate fair value due to their short-term nature. The fair market value of our Long-Term Debt approximates cost based on the borrowing rates currently available to us for bank loans with similar terms and remaining maturities. From time to time, we measure certain assets at fair value on a non-recurring basis, including evaluation of long-lived assets, goodwill and other intangible assets, as part of a business acquisition. These assets are measured and recognized at amounts equal to the fair value determined as of the date of acquisition. Fair value valuations are based on the information available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by us. There are inherent uncertainties and management judgment required in these determinations. The fair value measurements of assets and liabilities assumed as part of a business acquisition are based on valuations involving significant unobservable inputs, or Level 3, in the fair value hierarchy. These assets are also subject to periodic impairment testing by comparing the respective carrying value of each asset to the estimated fair value of the reporting unit or asset group in which they reside. In the event we determine these assets to be impaired, we would recognize an impairment loss equal to the amount by which the carrying value of the reporting unit, impairment asset or asset group exceeds its estimated fair value. These periodic impairment tests utilize company-specific assumptions involving unobservable inputs, or Level 3, in the fair value hierarchy.

Retirement Benefit Plans

Retirement Benefit Plans	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Retirement Benefit Plans	12. Retirement Benefit Plans Our defined benefit pension plans and postretirement medical plan are described in Note 13 of our annual report on Form 10-K for the year ended December 31, 2017 . We have contributed $36 and $139 during the third quarter of 2018 and $187 and $695 during the first nine months of 2018 to our pension plans and postretirement medical plan, respectively. The components of the net benefit cost for the three and nine months ended September 30, 2018 and 2017 were as follows: Three Months Ended September 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2018 2017 2018 2017 2018 2017 Service cost $ — $ — $ 33 $ 124 $ 6 $ 6 Interest cost 10 373 82 96 70 91 Expected return on plan assets — (581 ) (77 ) (101 ) — — Amortization of net actuarial loss 13 12 — — — — Amortization of prior service cost — — 54 50 — — Foreign currency — — (118 ) 135 — — Net periodic benefit cost (credit) 23 (196 ) (26 ) 304 76 97 Net benefit cost (credit) $ 23 $ (196 ) $ (26 ) $ 304 $ 76 $ 97 Nine Months Ended September 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2018 2017 2018 2017 2018 2017 Service cost $ — $ — $ 105 $ 172 $ 34 $ 46 Interest cost 32 1,153 240 315 220 272 Expected return on plan assets — (1,752 ) (268 ) (298 ) — — Amortization of net actuarial loss 37 33 — — — — Amortization of prior service cost — — 160 146 — — Foreign currency — — (212 ) 364 — — Net periodic benefit cost (credit) 69 (566 ) 25 699 254 318 Settlement charge 50 205 — — — — Net benefit cost (credit) $ 119 $ (361 ) $ 25 $ 699 $ 254 $ 318

Commitments and Contingencies (

Commitments and Contingencies (Notes)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments Contingencies and Guarantees [Text Block]	13. Commitments and Contingencies Certain operating leases for vehicles contain residual value guarantee provisions, which would become due at the expiration of the operating lease agreement if the fair value of the leased vehicles is less than the guaranteed residual value. As of September 30, 2018 , of those leases that contain residual value guarantees, the aggregate residual value at lease expiration was $13,990 , of which we have guaranteed $8,371 . As of September 30, 2018 , we have recorded a liability for the estimated end of term loss related to this residual value guarantee of $317 for certain vehicles within our fleet. Our fleet also contains vehicles we estimate will settle at a gain. Gains on these vehicles will be recognized at the end of the lease term.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss (Notes)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Loss	14. Accumulated Other Comprehensive Loss Components of Accumulated Other Comprehensive Loss, net of tax, within the Condensed Consolidated Balance Sheets, are as follows: September 30, 2018 December 31, 2017 Foreign currency translation adjustments $ (29,456 ) $ (15,778 ) Pension and retiree medical benefits (1,661 ) (1,610 ) Cash flow hedge (7,116 ) (4,935 ) Total Accumulated Other Comprehensive Loss $ (38,233 ) $ (22,323 ) The changes in components of Accumulated Other Comprehensive Loss, net of tax, are as follows: Foreign Currency Translation Adjustments Pension and Post Retirement Benefits Cash Flow Hedge Total December 31, 2017 $ (15,778 ) $ (1,610 ) $ (4,935 ) $ (22,323 ) Other comprehensive (loss) income before reclassifications (13,678 ) 19 4,889 (8,770 ) Amounts reclassified from Accumulated Other Comprehensive Loss — 67 (5,944 ) (5,877 ) Adjustments to Accumulated Other Comprehensive Loss for disproportionate income tax effects recognized from the adoption of ASU 2018-02 — (137 ) (1,126 ) (1,263 ) Net current period other comprehensive loss (13,678 ) (51 ) (2,181 ) (15,910 ) September 30, 2018 $ (29,456 ) $ (1,661 ) $ (7,116 ) $ (38,233 )

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	15. Income Taxes We and our subsidiaries are subject to U.S. federal income tax as well as income tax of numerous state and foreign jurisdictions. We are generally no longer subject to U.S. federal tax examinations for taxable years before 2016 and, with limited exceptions, state and foreign income tax examinations for taxable years before 2013 . We recognize potential accrued interest and penalties related to unrecognized tax benefits in Income Tax Expense. In addition to the liability of $6,067 for unrecognized tax benefits as of September 30, 2018 , there was approximately $489 for accrued interest and penalties. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate as of September 30, 2018 was $5,842 . To the extent interest and penalties are not assessed with respect to uncertain tax positions, amounts accrued will be revised and reflected as an adjustment of the Income Tax Expense. The Internal Revenue Service completed its examination of the U.S. income tax return for the 2015 tax year during the third quarter of 2018. The IRS's adjustments to certain tax positions were not material and were fully reserved. We are currently undergoing income tax examinations in various state and foreign jurisdictions covering 2014 to 2016 . Although the final outcome of these examinations cannot be currently determined, we believe that we have adequate reserves with respect to these examinations. On December 22, 2017, the Tax Act was signed into law. The Tax Act made broad and complex changes to the U.S. tax code which includes a lowering of the U.S. federal corporate income tax rate from 35% to 21% effective January 1, 2018, accelerated expensing of qualified capital investments for a specific period, limitations of the deductibility of interest expense and executive compensation, and a transition from a worldwide to a territorial tax system, which requires companies to pay a one-time transition tax on certain unrepatriated earnings from foreign subsidiaries. ASC 740, Income Taxes, requires a company to record the effects of a tax law change in the period of enactment. ASU 2018-05 allows a company to record a provisional amount when it does not have the necessary information available, prepared or analyzed in reasonable detail to complete its accounting for the change in the tax law. The measurement period ends when the company has obtained, prepared and analyzed the information necessary to finalize its accounting, but cannot extend beyond one year. In the fourth quarter of 2017, we included a provisional amount for the one-time transition tax on certain unrepatriated earnings. The accounting for the income tax effect of the one-time transition tax on certain unrepatriated earnings was finalized in the third quarter of 2018, impacting the year-to-date overall effective tax rate by (1.3)% . In the fourth quarter of 2017, we remeasured our deferred taxes at the reduced corporate tax rate of 21% and recognized the change as a discrete income tax expense. The accounting for the remeasurement of the deferred taxes was finalized in the third quarter of 2018, and the impact to the year-to-date overall effective tax rate was immaterial. We recorded income tax expense of $158 during the third quarter of 2018 , or 1.6% of earnings before income taxes. During the first nine months of 2018 , we recorded income tax expense of $1,598 , or 5.8% of earnings before income taxes. This amount primarily reflects two items: (1) the Tax Act resulted in a lower tax rate beginning in the first quarter of 2018. This includes the estimated impacts of requiring a current inclusion in U.S. federal income of certain earnings of controlled foreign corporations, allowing a domestic corporation an immediate deduction in the U.S. taxable income for a portion of its foreign-derived intangible income, the base erosion anti-abuse tax, and limitations on the deductibility of executive compensation. These estimates had an immaterial impact on our effective income tax rate for 2018; and (2) during 2018, we recorded discrete income tax items to adjust our finalized transition tax liability by $(362) , and we realized two discrete tax benefits, totaling $3,568 , resulting from the exercise of soon-to-expire stock options and a favorable tax ruling from Italian tax authorities related to the deductibility of interest expense in Italy. We will continue to monitor and evaluate guidance and clarifications from the Internal Revenue Service as it relates to the Tax Act and will record adjustments as necessary.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2018
Share-based Compensation [Abstract]
Share-Based Compensation	16. Share-Based Compensation Our share-based compensation plans are described in Note 17 of our annual report on Form 10-K for the year ended December 31, 2017 . During the three months ended September 30, 2018 and 2017 , we recognized total Share-Based Compensation Expense of $1,893 and $1,293 , respectively. During the nine months ended September 30, 2018 and 2017 , we recognized total Share-Based Compensation Expense of $6,008 and $4,915 , respectively. The total excess tax benefit recognized for share-based compensation arrangements during the nine months ended September 30, 2018 and 2017 was $2,073 and $1,149 , respectively. During the first nine months of 2018 , we issued 16,377 restricted shares. The weighted average grant date fair value of each share awarded was $67.70 . Restricted share awards generally have a three year vesting period from the effective date of the grant. The total fair value of shares vested during the nine months ended September 30, 2018 and 2017 was $863 and $1,295 , respectively.

Earnings (Loss) Attributable to

Earnings (Loss) Attributable to Tennant Company Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings (Loss) Attributable to Tennant Company Per Share	17. Earnings (Loss) Attributable to Tennant Company Per Share The computations of Basic and Diluted Earnings (Loss) per Share were as follows: Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Numerator: Net Earnings (Loss) Attributable to Tennant Company $ 9,676 $ 3,559 $ 25,694 $ (2,989 ) Denominator: Basic - Weighted Average Shares Outstanding 17,998,917 17,729,857 17,911,880 17,673,656 Effect of dilutive securities: Share-based compensation plans 440,704 441,587 432,933 — Diluted - Weighted Average Shares Outstanding 18,439,621 18,171,444 18,344,813 17,673,656 Basic Earnings (Loss) per Share $ 0.54 $ 0.20 $ 1.43 $ (0.17 ) Diluted Earnings (Loss) per Share $ 0.52 $ 0.20 $ 1.40 $ (0.17 ) Excluded from the dilutive securities shown above were options to purchase and shares to be paid out under share-based compensation plans of 139,106 and 340,239 shares of common stock during the three months ended September 30, 2018 and 2017 , respectively. Excluded from the dilutive securities shown above were options to purchase and shares to be paid out under share-based compensation plans of 214,605 and 714,687 shares of common stock during the nine months ended September 30, 2018 and 2017 , respectively. These exclusions were made if the exercise prices of the options are greater than the average market price of our common stock for the period, if the number of shares we can repurchase under the treasury stock method exceeds the weighted average shares outstanding in the options or if we have a net loss, as these effects are anti-dilutive.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment Reporting	18. Segment Reporting We are organized into four operating segments: North America, Latin America, EMEA and APAC. We combine our North America and Latin America operating segments into the “Americas” for reporting Net Sales by geographic area. In accordance with the objective and basic principles of the applicable accounting guidance, we aggregate our operating segments into one reportable segment that consists of the design, manufacture and sale of products used primarily in the maintenance of nonresidential surfaces. Further disclosures regarding our net sales by geographic area are discussed in Note 3.

Separate Financial Information

Separate Financial Information of Guarantor Subsidiaries (Notes)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Separate Financial Information of Guarantor Subsidiaries	19. Separate Financial Information of Guarantor Subsidiaries The following condensed consolidated guarantor financial information is presented to comply with the requirements of Rule 3-10 of Regulation S-X. In 2017, we issued and sold $300,000 in aggregate principal amount of our 5.625% Senior Notes due 2025 (the "Notes), pursuant to an Indenture, dated as of April 18, 2017, among the company, the Guarantors (as defined below), and Wells Fargo Bank, National Association, a national banking association, as trustee. The Notes are unconditionally and jointly and severally guaranteed by Tennant Coatings, Inc. and Tennant Sales and Service Company (collectively, the "Guarantors"), which are wholly owned subsidiaries of the company. The Notes and the guarantees constitute senior unsecured obligations of the company and the Guarantors, respectively. The Notes and the guarantees, respectively, are: (a) equal in right of payment with all of the company’s and the Guarantors’ senior debt, without giving effect to collateral arrangements; (b) senior in right of payment to all of the company’s and the Guarantors’ future subordinated debt, if any; (c) effectively subordinated in right of payment to all of the company’s and the Guarantors’ debt and obligations that are secured, including borrowings under the company’s senior secured credit facilities for so long as the senior secured credit facilities are secured, to the extent of the value of the assets securing such liens; and (d) structurally subordinated in right of payment to all liabilities (including trade payables) of the company’s and the Guarantors’ subsidiaries that do not guarantee the Notes. The following condensed consolidated financial information presents the Condensed Consolidated Statements of Operations and the Condensed Consolidated Statements of Comprehensive Income for each of the three and nine months ended September 30, 2018 and September 30, 2017 , the related Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017 , and the related Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and September 30, 2017 , of Tennant Company ("Parent"), the Guarantor Subsidiaries on a combined basis, the Non-Guarantor Subsidiaries on a combined basis and elimination entries necessary to consolidate the Parent with the Guarantor and Non-Guarantor Subsidiaries. The following condensed consolidated financial statements should be read in conjunction with the consolidated financial statements of the company and notes thereto of which this note is an integral part. Condensed Consolidated Statement of Operations For the three months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 126,110 $ 160,226 $ 131,418 $ (144,499 ) $ 273,255 Cost of Sales 86,781 135,058 87,707 (144,376 ) 165,170 Gross Profit 39,329 25,168 43,711 (123 ) 108,085 Operating Expense: Research and Development Expense 6,096 279 1,131 — 7,506 Selling and Administrative Expense 26,765 18,091 39,473 811 85,140 Total Operating Expense 32,861 18,370 40,604 811 92,646 Profit from Operations 6,468 6,798 3,107 (934 ) 15,439 Other Income (Expense): Equity in Earnings of Affiliates 5,256 262 205 (5,723 ) — Interest (Expense) Income, Net (5,230 ) — 92 (9 ) (5,147 ) Intercompany Interest Income (Expense) 3,621 (1,450 ) (2,171 ) — — Net Foreign Currency Transaction (Losses) Gains (69 ) 4 (230 ) — (295 ) Other Expense, Net (179 ) (473 ) (263 ) 785 (130 ) Total Other Income (Expense), Net 3,399 (1,657 ) (2,367 ) (4,947 ) (5,572 ) Profit Before Income Taxes 9,867 5,141 740 (5,881 ) 9,867 Income Tax Expense (Benefit) 158 1,230 (865 ) (365 ) 158 Net Earnings Including Noncontrolling Interest 9,709 3,911 1,605 (5,516 ) 9,709 Net Earnings Attributable to Noncontrolling Interest 33 — 33 (33 ) 33 Net Earnings Attributable to Tennant Company $ 9,676 $ 3,911 $ 1,572 $ (5,483 ) $ 9,676 Condensed Consolidated Statement of Operations For the nine months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 366,093 $ 472,524 $ 422,887 $ (423,205 ) $ 838,299 Cost of Sales 249,065 395,327 278,207 (421,821 ) 500,778 Gross Profit 117,028 77,197 144,680 (1,384 ) 337,521 Operating Expense: Research and Development Expense 18,625 825 3,958 — 23,408 Selling and Administrative Expense 84,478 57,151 126,833 811 269,273 Total Operating Expense 103,103 57,976 130,791 811 292,681 Profit from Operations 13,925 19,221 13,889 (2,195 ) 44,840 Other Income (Expense): Equity in Earnings of Affiliates 19,657 1,356 4,234 (25,247 ) — Interest (Expense) Income, Net (15,726 ) — 558 (28 ) (15,196 ) Intercompany Interest Income (Expense) 10,989 (4,308 ) (6,681 ) — — Net Foreign Currency Transaction Losses (354 ) (2 ) (1,025 ) — (1,381 ) Other (Expense) Income, Net (1,118 ) (1,610 ) 1,113 725 (890 ) Total Other Income (Expense), Net 13,448 (4,564 ) (1,801 ) (24,550 ) (17,467 ) Profit Before Income Taxes 27,373 14,657 12,088 (26,745 ) 27,373 Income Tax Expense 1,598 3,520 705 (4,225 ) 1,598 Net Earnings Including Noncontrolling Interest 25,775 11,137 11,383 (22,520 ) 25,775 Net Earnings Attributable to Noncontrolling Interest 81 — 81 (81 ) 81 Net Earnings Attributable to Tennant Company $ 25,694 $ 11,137 $ 11,302 $ (22,439 ) $ 25,694 Condensed Consolidated Statement of Operations For the three months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 111,835 $ 146,495 $ 131,457 $ (127,866 ) $ 261,921 Cost of Sales 76,974 120,523 88,411 (128,591 ) 157,317 Gross Profit 34,861 25,972 43,046 725 104,604 Operating Expense: Research and Development Expense 6,312 86 1,509 — 7,907 Selling and Administrative Expense 23,498 19,074 43,139 — 85,711 Total Operating Expense 29,810 19,160 44,648 — 93,618 Profit (Loss) from Operations 5,051 6,812 (1,602 ) 725 10,986 Other Income (Expense): Equity in Earnings of Affiliates 2,039 376 — (2,415 ) — Interest Expense, Net (5,275 ) — (111 ) (9 ) (5,395 ) Intercompany Interest Income (Expense) 3,774 (1,455 ) (2,319 ) — — Net Foreign Currency Transaction Gains (Losses) 357 2 (1,201 ) — (842 ) Other (Expense) Income, Net (1,619 ) (204 ) 1,424 (23 ) (422 ) Total Other Expense, Net (724 ) (1,281 ) (2,207 ) (2,447 ) (6,659 ) Profit (Loss) Before Income Taxes 4,327 5,531 (3,809 ) (1,722 ) 4,327 Income Tax Expense 731 2,034 2,819 (4,853 ) 731 Net Earnings (Loss) Including Noncontrolling Interest 3,596 3,497 (6,628 ) 3,131 3,596 Net Earnings Attributable to Noncontrolling Interest 37 — 37 (37 ) 37 Net Earnings (Loss) Attributable to Tennant Company $ 3,559 $ 3,497 $ (6,665 ) $ 3,168 $ 3,559 Condensed Consolidated Statement of Operations For the nine months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 337,034 $ 442,090 $ 331,491 $ (386,844 ) $ 723,771 Cost of Sales 230,753 363,034 228,838 (387,748 ) 434,877 Gross Profit 106,281 79,056 102,653 904 288,894 Operating Expense: Research and Development Expense 20,838 245 3,156 — 24,239 Selling and Administrative Expense 85,697 58,881 102,415 — 246,993 Total Operating Expense 106,535 59,126 105,571 — 271,232 (Loss) Profit from Operations (254 ) 19,930 (2,918 ) 904 17,662 Other Income (Expense): Equity in Earnings of Affiliates 7,493 1,500 — (8,993 ) — Interest Expense, Net (16,866 ) — (257 ) (22 ) (17,145 ) Intercompany Interest Income (Expense) 8,742 (4,323 ) (4,419 ) — — Net Foreign Currency Transaction Gains (Losses) 553 — (2,928 ) — (2,375 ) Other (Expense) Income, Net (2,300 ) (430 ) 2,014 (58 ) (774 ) Total Other Expense, Net (2,378 ) (3,253 ) (5,590 ) (9,073 ) (20,294 ) (Loss) Profit Before Income Taxes (2,632 ) 16,677 (8,508 ) (8,169 ) (2,632 ) Income Tax Expense 385 5,993 5,481 (11,474 ) 385 Net (Loss) Earnings Including Noncontrolling Interest (3,017 ) 10,684 (13,989 ) 3,305 (3,017 ) Net Loss Attributable to Noncontrolling Interest (28 ) — (28 ) 28 (28 ) Net (Loss) Earnings Attributable to Tennant Company $ (2,989 ) $ 10,684 $ (13,961 ) $ 3,277 $ (2,989 ) Condensed Consolidated Statement of Comprehensive Income For the three months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Earnings Including Noncontrolling Interest $ 9,709 $ 3,911 $ 1,605 $ (5,516 ) $ 9,709 Other Comprehensive Loss: Foreign currency translation adjustments (3,110 ) 228 (3,664 ) 3,436 (3,110 ) Pension and retiree medical benefits 12 — — — 12 Cash flow hedge (28 ) — — — (28 ) Income Taxes: Foreign currency translation adjustments 280 — 280 (280 ) 280 Pension and retiree medical benefits (2 ) — — — (2 ) Cash flow hedge 6 — — — 6 Total Other Comprehensive Loss, net of tax (2,842 ) 228 (3,384 ) 3,156 (2,842 ) Total Comprehensive Income (Loss) Including Noncontrolling Interest 6,867 4,139 (1,779 ) (2,360 ) 6,867 Comprehensive Income Attributable to Noncontrolling Interest 33 — 33 (33 ) 33 Comprehensive Income (Loss) Attributable to Tennant Company $ 6,834 $ 4,139 $ (1,812 ) $ (2,327 ) $ 6,834 Condensed Consolidated Statement of Comprehensive Income For the nine months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Earnings Including Noncontrolling Interest $ 25,775 $ 11,137 $ 11,383 $ (22,520 ) $ 25,775 Other Comprehensive Loss: Foreign currency translation adjustments (14,202 ) (262 ) (20,103 ) 20,365 (14,202 ) Pension and retiree medical benefits 105 — 19 (19 ) 105 Cash flow hedge (1,367 ) — — — (1,367 ) Income Taxes: Foreign currency translation adjustments 524 — 524 (524 ) 524 Pension and retiree medical benefits (156 ) — — — (156 ) Cash flow hedge (814 ) — — — (814 ) Total Other Comprehensive Loss, net of tax (15,910 ) (262 ) (19,560 ) 19,822 (15,910 ) Total Comprehensive Income (Loss) Including Noncontrolling Interest 9,865 10,875 (8,177 ) (2,698 ) 9,865 Comprehensive Income Attributable to Noncontrolling Interest 81 — 81 (81 ) 81 Comprehensive Income (Loss) Attributable to Tennant Company $ 9,784 $ 10,875 $ (8,258 ) $ (2,617 ) $ 9,784 Condensed Consolidated Statement of Comprehensive Income For the three months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Earnings (Loss) Including Noncontrolling Interest $ 3,596 $ 3,497 $ (6,628 ) $ 3,131 $ 3,596 Other Comprehensive Income (Loss): Foreign currency translation adjustments 9,033 289 9,221 (9,510 ) 9,033 Pension and retiree medical benefits 379 — 10 (10 ) 379 Cash flow hedge (1,732 ) — — — (1,732 ) Income Taxes: Foreign currency translation adjustments — — — — — Pension and retiree medical benefits (138 ) — — — (138 ) Cash flow hedge 646 — — — 646 Total Other Comprehensive Income, net of tax 8,188 289 9,231 (9,520 ) 8,188 Total Comprehensive Income Including Noncontrolling Interest 11,784 3,786 2,603 (6,389 ) 11,784 Comprehensive Income Attributable to Noncontrolling Interest 37 — 37 (37 ) 37 Comprehensive Income Attributable to Tennant Company $ 11,747 $ 3,786 $ 2,566 $ (6,352 ) $ 11,747 Condensed Consolidated Statement of Comprehensive Income For the nine months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net (Loss) Earnings Including Noncontrolling Interest $ (3,017 ) $ 10,684 $ (13,989 ) $ 3,305 $ (3,017 ) Other Comprehensive Income (Loss): Foreign currency translation adjustments 25,073 693 1,330 (2,023 ) 25,073 Pension and retiree medical benefits 541 — 151 (151 ) 541 Cash flow hedge (6,311 ) — — — (6,311 ) Income Taxes: Foreign currency translation adjustments — — — — — Pension and retiree medical benefits (160 ) — (15 ) 15 (160 ) Cash flow hedge 2,354 — — — 2,354 Total Other Comprehensive Income, net of tax 21,497 693 1,466 (2,159 ) 21,497 Total Comprehensive Income (Loss) Including Noncontrolling Interest 18,480 11,377 (12,523 ) 1,146 18,480 Comprehensive (Loss) Income Attributable to Noncontrolling Interest (28 ) — (28 ) 28 (28 ) Comprehensive Income (Loss) Attributable to Tennant Company $ 18,508 $ 11,377 $ (12,495 ) $ 1,118 $ 18,508 Condensed Consolidated Balance Sheet As of September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company ASSETS Current Assets: Cash and Cash Equivalents $ 18,082 $ 668 $ 34,723 $ — $ 53,473 Restricted Cash — — 534 — 534 Net Receivables 494 93,464 114,161 — 208,119 Intercompany Receivables 31,488 142,708 — (174,196 ) — Inventories 35,858 15,118 99,220 (10,403 ) 139,793 Prepaid Expenses 17,673 705 9,978 — 28,356 Other Current Assets 4,691 340 3,834 — 8,865 Total Current Assets 108,286 253,003 262,450 (184,599 ) 439,140 Property, Plant and Equipment 228,237 12,533 140,673 — 381,443 Accumulated Depreciation (156,476 ) (6,459 ) (54,690 ) — (217,625 ) Property, Plant and Equipment, Net 71,761 6,074 85,983 — 163,818 Deferred Income Taxes 3,127 3,078 8,857 — 15,062 Investment in Affiliates 403,903 12,133 18,487 (434,523 ) — Intercompany Loans 303,670 — 3,997 (307,667 ) — Goodwill 12,870 1,726 170,023 — 184,619 Intangible Assets, Net 4,210 2,738 146,026 — 152,974 Other Assets 6,057 — 8,896 — 14,953 Total Assets $ 913,884 $ 278,752 $ 704,719 $ (926,789 ) $ 970,566 LIABILITIES AND TOTAL EQUITY Current Liabilities: Current Portion of Long-Term Debt $ 29,705 $ — $ 1,294 $ — $ 30,999 Accounts Payable 34,447 6,727 49,604 — 90,778 Intercompany Payables 143,095 — 31,101 (174,196 ) — Employee Compensation and Benefits 10,588 12,873 18,696 — 42,157 Income Taxes Payable 469 — 2,801 (298 ) 2,972 Other Current Liabilities 28,216 14,348 28,980 298 71,842 Total Current Liabilities 246,520 33,948 132,476 (174,196 ) 238,748 Long-Term Liabilities: Long-Term Debt 315,277 — 1,660 — 316,937 Intercompany Loans 3,997 128,000 175,670 (307,667 ) — Employee-Related Benefits 11,519 1,916 8,393 — 21,828 Deferred Income Taxes — — 48,491 — 48,491 Other Liabilities 27,488 3,336 4,655 — 35,479 Total Long-Term Liabilities 358,281 133,252 238,869 (307,667 ) 422,735 Total Liabilities 604,801 167,200 371,345 (481,863 ) 661,483 Equity: Common Stock 6,796 — 11,131 (11,131 ) 6,796 Additional Paid-In Capital 26,087 77,551 388,216 (465,767 ) 26,087 Retained Earnings 312,539 34,932 (9,916 ) (25,016 ) 312,539 Accumulated Other Comprehensive Loss (38,233 ) (931 ) (57,951 ) 58,882 (38,233 ) Total Tennant Company Shareholders' Equity 307,189 111,552 331,480 (443,032 ) 307,189 Noncontrolling Interest 1,894 — 1,894 (1,894 ) 1,894 Total Equity 309,083 111,552 333,374 (444,926 ) 309,083 Total Liabilities and Total Equity $ 913,884 $ 278,752 $ 704,719 $ (926,789 ) $ 970,566 Condensed Consolidated Balance Sheet As of December 31, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company ASSETS Current Assets: Cash and Cash Equivalents $ 18,469 $ 507 $ 39,422 $ — $ 58,398 Restricted Cash — — 653 — 653 Net Receivables 683 88,629 120,204 — 209,516 Intercompany Receivables 53,444 133,778 — (187,222 ) — Inventories 29,450 12,695 94,542 (8,993 ) 127,694 Prepaid Expenses 8,774 1,172 9,405 — 19,351 Other Current Assets 4,030 — 3,473 — 7,503 Total Current Assets 114,850 236,781 267,699 (196,215 ) 423,115 Property, Plant and Equipment 225,064 12,155 145,549 — 382,768 Accumulated Depreciation (146,320 ) (6,333 ) (50,097 ) — (202,750 ) Property, Plant and Equipment, Net 78,744 5,822 95,452 — 180,018 Deferred Income Taxes 1,308 2,669 7,157 — 11,134 Investment in Affiliates 392,486 11,273 20,811 (424,570 ) — Intercompany Loans 304,822 — 4,983 (309,805 ) — Goodwill 12,869 1,739 171,436 — 186,044 Intangible Assets, Net 2,105 2,898 167,344 — 172,347 Other Assets 10,363 — 10,956 — 21,319 Total Assets $ 917,547 $ 261,182 $ 745,838 $ (930,590 ) $ 993,977 LIABILITIES AND TOTAL EQUITY Current Liabilities: Current Portion of Long-Term Debt $ 29,413 $ — $ 1,470 $ — $ 30,883 Accounts Payable 39,927 3,018 53,137 — 96,082 Intercompany Payables 133,778 1,963 51,481 (187,222 ) — Employee Compensation and Benefits 8,311 10,355 18,591 — 37,257 Income Taxes Payable 366 — 2,472 — 2,838 Other Current Liabilities 20,183 15,760 33,504 — 69,447 Total Current Liabilities 231,978 31,096 160,655 (187,222 ) 236,507 Long-Term Liabilities: Long-Term Debt 344,147 — 1,809 — 345,956 Intercompany Loans — 128,000 181,805 (309,805 ) — Employee-Related Benefits 11,160 3,992 8,715 — 23,867 Deferred Income Taxes — — 53,225 — 53,225 Other Liabilities 31,788 2,483 1,677 — 35,948 Total Long-Term Liabilities 387,095 134,475 247,231 (309,805 ) 458,996 Total Liabilities 619,073 165,571 407,886 (497,027 ) 695,503 Equity: Common Stock 6,705 — 11,131 (11,131 ) 6,705 Additional Paid-In Capital 15,089 72,483 384,460 (456,943 ) 15,089 Retained Earnings 297,032 23,797 (21,219 ) (2,578 ) 297,032 Accumulated Other Comprehensive Loss (22,323 ) (669 ) (38,391 ) 39,060 (22,323 ) Total Tennant Company Shareholders' Equity 296,503 95,611 335,981 (431,592 ) 296,503 Noncontrolling Interest 1,971 — 1,971 (1,971 ) 1,971 Total Equity 298,474 95,611 337,952 (433,563 ) 298,474 Total Liabilities and Total Equity $ 917,547 $ 261,182 $ 745,838 $ (930,590 ) $ 993,977 Condensed Consolidated Statement of Cash Flows For the nine months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities $ 43,661 $ 219 $ (411 ) $ — $ 43,469 INVESTING ACTIVITIES Purchases of Property, Plant and Equipment (4,505 ) (58 ) (8,205 ) — (12,768 ) Proceeds from Disposals of Property, Plant and Equipment 20 — 88 — 108 Proceeds from Principal Payments Received on Long-Term Note Receivable — — 828 — 828 Proceeds from Sale of Business — — 4,000 — 4,000 Purchase of Intangible Assets (2,500 ) — (107 ) — (2,607 ) Change in Investments in Subsidiaries (1,817 ) — — 1,817 — Loan Payments from Subsidiaries 1,218 — — (1,218 ) — Loan Payments from Parent — — 986 (986 ) — Net Cash Used in Investing Activities (7,584 ) (58 ) (2,410 ) (387 ) (10,439 ) FINANCING ACTIVITIES Payments of Long-Term Debt (30,000 ) — (216 ) — (30,216 ) Change in Capital Lease Obligations — — 7 — 7 Change in Subsidiary Equity — — 1,817 (1,817 ) — Loan Payments to Parent — — (1,218 ) 1,218 — Loan Payments to Subsidiaries (986 ) — — 986 — Proceeds from Issuances of Common Stock 5,735 — — — 5,735 Dividends Paid (11,356 ) — — — (11,356 ) Net Cash (Used in) Provided by Financing Activities (36,607 ) — 390 387 (35,830 ) Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash 143 — (2,387 ) — (2,244 ) Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash (387 ) 161 (4,818 ) — (5,044 ) Cash, Cash Equivalents and Restricted Cash at Beginning of Period 18,469 507 40,075 — 59,051 Cash, Cash Equivalents and Restricted Cash at End of Period $ 18,082 $ 668 $ 35,257 $ — $ 54,007 Condensed Consolidated Statement of Cash Flows For the nine months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company OPERATING ACTIVITIES Net Cash (Used in) Provided by Operating Activities $ (555 ) $ 798 $ 31,880 $ — $ 32,123 INVESTING ACTIVITIES Purchases of Property, Plant and Equipment (7,400 ) — (8,839 ) — (16,239 ) Proceeds from Disposals of Property, Plant and Equipment 17 — 2,439 — 2,456 Proceeds from Principal Payments Received on Long-Term Note Receivable — — 500 — 500 Issuance of Long-Term Note Receivable — — (1,500 ) — (1,500 ) Acquisition of Businesses, Net of Cash Acquired (304 ) — (353,231 ) — (353,535 ) Purchase of Intangible Asset (2,500 ) — — — (2,500 ) Change in Investments in Subsidiaries (193,639 ) — — 193,639 — Loan (Payments) Borrowings from Subsidiaries (159,780 ) — — 159,780 — Net Cash Used in Investing Activities (363,606 ) — (360,631 ) 353,419 (370,818 ) FINANCING ACTIVITIES Proceeds from Short-Term Debt 300,000 — — — 300,000 Repayments of Short-Term Debt (300,000 ) — — — (300,000 ) Loan Borrowings (Payments) from Parent — — 159,780 (159,780 ) — Change in Subsidiary Equity — — 193,639 (193,639 ) — Proceeds from Issuance of Long-Term Debt 440,000 — — — 440,000 Payments of Long-Term Debt (81,143 ) — (119 ) — (81,262 ) Payments of Debt Issuance Costs (16,465 ) — — — (16,465 ) Proceeds from Issuance of Common Stock 4,728 — — — 4,728 Dividends Paid (11,204 ) — — — (11,204 ) Net Cash Provided by Financing Activities 335,916 — 353,300 (353,419 ) 335,797 Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash (68 ) — 1,655 — 1,587 Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash (28,313 ) 798 26,204 — (1,311 ) Cash, Cash Equivalents and Restricted Cash at Beginning of Period 38,484 226 19,840 — 58,550 Cash, Cash Equivalents and Restricted Cash at End of Period $ 10,171 $ 1,024 $ 46,044 $ — $ 57,239

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation – The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the Securities and Exchange Commission (“SEC”) requirements for interim reporting, which allows certain footnotes and other financial information normally required by accounting principles generally accepted in the United States of America to be condensed or omitted. In our opinion, the Condensed Consolidated Financial Statements contain all adjustments (consisting of only normal recurring adjustments) necessary for the fair presentation of our financial position and results of operations. These statements should be read in conjunction with the Consolidated Financial Statements and Notes included in our annual report on Form 10-K for the year ended December 31, 2017 . The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year.
Revenue Recognition	Revenue Recognition – Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products and services. Generally, these criteria are met at the time the product is shipped. We also enter into contracts that can include combinations of products and services, which are generally capable of being distinct and are accounted for as separate performance obligations. Revenue is recognized net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities. Further details regarding revenue recognition are discussed in Notes 2 and 3.
New Accounting Pronouncements	New Accounting Pronouncements – Further details regarding the adoption of new accounting standards are discussed in Note 2.

Newly Adopted Accounting Pron_2

Newly Adopted Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The reclassification from Accounts Receivable to Other Current Liabilities in accordance with the detail described above impacted the Condensed Consolidated Balance Sheet as of September 30, 2018 , as follows (in thousands): As Reported Balances Without Adoption of ASC 606 Effect of Change Higher/(Lower) ASSETS Accounts Receivable $ 208,119 $ 206,960 $ 1,159 Total Current Assets 439,140 437,981 1,159 Total Assets $ 970,566 $ 969,407 $ 1,159 LIABILITIES Other Current Liabilities $ 71,842 $ 70,683 $ 1,159 Total Current Liabilities 238,748 237,589 1,159 Total Liabilities $ 661,483 $ 660,324 $ 1,159

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following tables illustrate the disaggregation of revenue by geographic area, groups of similar products and services and sales channels for the three and nine months ended September 30, 2018 and 2017 (in thousands): Net Sales by geographic area Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Americas $ 175,341 $ 161,037 $ 516,731 $ 472,953 Europe, Middle East and Africa 74,254 78,851 250,480 189,483 Asia Pacific 23,660 22,033 71,088 61,335 Total $ 273,255 $ 261,921 $ 838,299 $ 723,771 Net Sales are attributed to each geographic area based on the end user country and are net of intercompany sales. Net Sales by groups of similar products and services Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Equipment $ 178,165 $ 165,203 $ 542,317 $ 455,311 Parts and Consumables 53,639 53,535 168,491 149,260 Specialty Surface Coatings 7,139 8,007 21,434 22,491 Service and Other 34,312 35,176 106,057 96,709 Total $ 273,255 $ 261,921 $ 838,299 $ 723,771 Net Sales by sales channel Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Sales Direct to Consumer $ 180,901 $ 172,484 $ 547,079 $ 490,533 Sales to Distributors 92,354 89,437 291,220 233,238 Total $ 273,255 $ 261,921 $ 838,299 $ 723,771
Contract with Customer, Asset and Liability [Table Text Block]	The change in our sales incentive accrual balance for the nine months ended September 30, 2018 was as follows: Nine Months Ended September 30 2018 Beginning balance $ 13,466 Additions to sales incentive accrual 22,078 Contract payments (21,677 ) Foreign currency fluctuations (239 ) Ending balance $ 13,628
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]	The change in the deferred revenue balance for the nine months ended September 30, 2018 was as follows: Nine Months Ended September 30 2018 Beginning balance $ 7,787 Increase in deferred revenue representing our obligation to satisfy future performance obligations 11,032 Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations (10,475 ) Foreign currency fluctuations (140 ) Ending balance $ 8,204
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	At September 30, 2018 , $5,064 and $3,140 of deferred revenue was reported in Other Current Liabilities and Other Liabilities, respectively, on our Condensed Consolidated Balance Sheets. Of this, we expect to recognize the following approximate amounts in Net Sales in the following periods: Remaining 2018 $ 2,502 2019 2,958 2020 1,595 2021 692 2022 381 Thereafter 76 Total $ 8,204

Management Actions (Tables)

Management Actions (Tables)	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Reconciliation of beginning and ending liability balances	A reconciliation of the beginning and ending liability balances is as follows: Severance and Related Costs 2017 restructuring actions $ 9,558 Cash payments (6,312 ) Foreign currency adjustments 190 December 31, 2017 balance $ 3,436 2018 utilization: Cash payments (1,694 ) Foreign currency adjustments (64 ) September 30, 2018 balance $ 1,678

Acquisitions and Divestitures_2

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the final fair value measurement of the assets acquired and liabilities assumed as of the date of acquisition: ASSETS Receivables $ 39,984 Inventories 46,442 Other Current Assets 7,456 Assets Held for Sale 2,247 Property, Plant and Equipment 63,890 Intangible Assets Subject to Amortization: Trade Name 26,753 Customer Lists 123,061 Technology 9,631 Other Assets 2,000 Total Identifiable Assets Acquired 321,464 LIABILITIES Accounts Payable 32,227 Accrued Expenses 18,130 Deferred Income Taxes 56,950 Other Liabilities 10,964 Total Identifiable Liabilities Assumed 118,271 Net Identifiable Assets Acquired 203,193 Noncontrolling Interest (1,896 ) Goodwill 152,472 Total Purchase Price, net of Cash Acquired $ 353,769
Schedule of Pro Forma Financial Information		The following unaudited pro forma financial information presents the combined results of operations of Tennant Company as if the 2017 acquisition of the IPC Group had occurred as of January 1, 2016. The unaudited pro forma financial information is presented for informational purposes only. It is not necessarily indicative of what our consolidated results of operations actually would have been had the acquisition occurred at the beginning of fiscal 2016. No pro forma results are presented for the three or nine months ended September 30, 2018 , as the results of the acquired company are included in the actual results. Pro Forma Financial Information (Unaudited) Three Months Ended Nine Months Ended (In thousands, except per share data) September 30 September 30 2017 2017 Net Sales Pro forma $ 261,921 $ 777,832 As reported 261,921 723,771 Net Earnings (Loss) Attributable to Tennant Company Pro forma $ 5,800 $ 14,875 As reported 3,559 (2,989 ) Net Earnings (Loss) Attributable to Tennant Company per Share Pro forma $ 0.32 $ 0.84 As reported 0.20 (0.17 )

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories are valued at the lower of cost or market. Inventories at September 30, 2018 and December 31, 2017 consisted of the following: September 30, December 31, Inventories carried at LIFO: Finished goods $ 48,471 $ 43,439 Raw materials, production parts and work-in-process 28,994 23,694 LIFO reserve (30,668 ) (28,429 ) Total LIFO inventories 46,797 38,704 Inventories carried at FIFO: Finished goods 53,138 54,161 Raw materials, production parts and work-in-process 39,858 34,829 Total FIFO inventories 92,996 88,990 Total inventories $ 139,793 $ 127,694

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the carrying value of Goodwill	The changes in the carrying value of Goodwill for the nine months ended September 30, 2018 were as follows: Goodwill Accumulated Impairment Losses Total Balance as of December 31, 2017 $ 227,224 $ (41,180 ) $ 186,044 Purchase accounting adjustments 4,627 — 4,627 Foreign currency fluctuations (7,542 ) 1,490 (6,052 ) Balance as of September 30, 2018 $ 224,309 $ (39,690 ) $ 184,619
Acquired Intangible Assets excluding Goodwill	The balances of acquired Intangible Assets, excluding Goodwill, as of September 30, 2018 and December 31, 2017 , were as follows: Customer Lists Trade Names Technology Total Balance as of September 30, 2018 Original cost $ 144,760 $ 30,945 $ 17,134 $ 192,839 Accumulated amortization (29,908 ) (4,631 ) (5,326 ) (39,865 ) Carrying value $ 114,852 $ 26,314 $ 11,808 $ 152,974 Weighted average original life (in years) 15 10 11 Balance as of December 31, 2017 Original cost $ 149,355 $ 31,968 $ 14,589 $ 195,912 Accumulated amortization (17,870 ) (2,436 ) (3,259 ) (23,565 ) Carrying value $ 131,485 $ 29,532 $ 11,330 $ 172,347 Weighted average original life (in years) 15 10 11
Estimated aggregate amortization expense of Intangible Assets	Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows: Remaining 2018 $ 5,456 2019 21,268 2020 19,827 2021 18,244 2022 15,965 Thereafter 72,214 Total $ 152,974

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Summary of Outstanding Debt	Debt outstanding at September 30, 2018 and December 31, 2017 consisted of the following: September 30, December 31, Long-Term Debt: Senior unsecured notes $ 300,000 $ 300,000 Credit facility borrowings 50,000 80,000 Capital lease obligations 2,955 3,279 Total Long-Term Debt 352,955 383,279 Less: unamortized debt issuance costs (5,020 ) (6,440 ) Less: current maturities of credit facility borrowings, net of debt issuance costs (1) (29,704 ) (29,413 ) Less: current maturities of capital lease obligations (1) (1,294 ) (1,470 ) Long-term portion $ 316,937 $ 345,956 (1) Current maturities of long-term debt include $30,000 of current maturities, less $296 of unamortized debt issuance costs, under our 2017 Credit Agreement and $1,294 of current maturities of capital lease obligations.

Warranty (Tables)

Warranty (Tables)	9 Months Ended
	Sep. 30, 2018
Product Warranties Disclosures [Abstract]
Changes in warranty reserve	The changes in warranty reserves for the nine months ended September 30, 2018 and 2017 were as follows: Nine Months Ended September 30 2018 2017 Beginning balance $ 12,676 $ 10,960 Additions charged to expense 10,883 8,879 Acquired warranty obligations — 384 Foreign currency fluctuations (193 ) 225 Claims paid (9,805 ) (8,912 ) Ending balance $ 13,561 $ 11,536

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivative instruments on our Condensed Consolidated Balance Sheets	The fair value of derivative instruments on our Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017 was as follows: September 30, 2018 December 31, 2017 Fair Value Asset Derivatives Fair Value Liability Derivatives Fair Value Asset Derivatives Fair Value Liability Derivatives Derivatives designated as hedging instruments: Foreign currency option contracts (1) $ 113 $ — $ 86 $ — Foreign currency forward contracts (1) 7,038 29,868 7,218 34,961 Derivatives not designated as hedging instruments: Foreign currency forward contracts (1) $ 653 $ 358 $ 442 $ 425 (1) Contracts that mature within the next 12 months are included in Other Current Assets and Other Current Liabilities for asset derivatives and liability derivatives, respectively, on our Condensed Consolidated Balance Sheets. Contracts with maturities greater than 12 months are included in Other Assets and Other Liabilities for asset derivatives and liability derivatives, respectively, in our Condensed Consolidated Balance Sheets. Amounts included in our Condensed Consolidated Balance Sheets are recorded net where a right of offset exists with the same derivative counterparty.
Derivative Instruments, Gain (Loss) [Table Text Block]	The effect of foreign currency derivative instruments designated as cash flow hedges and of foreign currency derivative instruments not designated as hedges in our Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2018 was as follows: Three Months Ended Nine Months Ended September 30, 2018 September 30, 2018 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax (1) $ (89 ) $ 1,253 $ (40 ) $ 4,929 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales (7 ) (33 ) (91 ) (34 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 487 — 1,345 Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses — 739 — 4,724 Net (loss) gain recognized in earnings (2) (5 ) 2 3 8 Derivatives not designated as hedging instruments: Net (loss) gain recognized in earnings (3) $ — $ (658 ) $ — $ 1,174 The effect of foreign currency derivative instruments designated as cash flow hedges and of foreign currency derivative instruments not designated as hedges in our Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2017 was as follows: Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 Foreign Currency Option Contracts Foreign Currency Forward Contracts Foreign Currency Option Contracts Foreign Currency Forward Contracts Derivatives in cash flow hedging relationships: Net loss recognized in Other Comprehensive (Loss) Income, net of tax (1) $ (40 ) $ (4,492 ) $ (177 ) $ (14,026 ) Net (loss) gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales (141 ) 26 (140 ) (76 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 374 — 823 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses — (3,705 ) — (10,853 ) Net (loss) gain recognized in earnings (2) (7 ) 3 (12 ) 8 Derivatives not designated as hedging instruments: Net loss recognized in earnings (3) $ — $ (2,062 ) $ (1,132 ) $ (7,369 ) (1) Net change in the fair value of the effective portion classified in Other Comprehensive (Loss) Income. (2) Ineffective portion and amount excluded from effectiveness testing classified in Net Foreign Currency Transaction Losses. (3) Classified in Net Foreign Currency Transaction Losses.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair value measurements of assets and liabilities	Our population of assets and liabilities subject to fair value measurements at September 30, 2018 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 7,691 $ — $ 7,691 $ — Foreign currency option contracts 113 — 113 — Total Assets $ 7,804 $ — $ 7,804 $ — Liabilities: Foreign currency forward exchange contracts $ 30,226 $ — $ 30,226 $ — Total Liabilities $ 30,226 $ — $ 30,226 $ — Our population of assets and liabilities subject to fair value measurements at December 31, 2017 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 7,660 $ — $ 7,660 $ — Foreign currency option contracts 86 — 86 — Total Assets $ 7,746 $ — $ 7,746 $ — Liabilities: Foreign currency forward exchange contracts $ 35,386 $ — $ 35,386 $ — Total Liabilities $ 35,386 $ — $ 35,386 $ —

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Components of net benefit cost (credit)	The components of the net benefit cost for the three and nine months ended September 30, 2018 and 2017 were as follows: Three Months Ended September 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2018 2017 2018 2017 2018 2017 Service cost $ — $ — $ 33 $ 124 $ 6 $ 6 Interest cost 10 373 82 96 70 91 Expected return on plan assets — (581 ) (77 ) (101 ) — — Amortization of net actuarial loss 13 12 — — — — Amortization of prior service cost — — 54 50 — — Foreign currency — — (118 ) 135 — — Net periodic benefit cost (credit) 23 (196 ) (26 ) 304 76 97 Net benefit cost (credit) $ 23 $ (196 ) $ (26 ) $ 304 $ 76 $ 97 Nine Months Ended September 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2018 2017 2018 2017 2018 2017 Service cost $ — $ — $ 105 $ 172 $ 34 $ 46 Interest cost 32 1,153 240 315 220 272 Expected return on plan assets — (1,752 ) (268 ) (298 ) — — Amortization of net actuarial loss 37 33 — — — — Amortization of prior service cost — — 160 146 — — Foreign currency — — (212 ) 364 — — Net periodic benefit cost (credit) 69 (566 ) 25 699 254 318 Settlement charge 50 205 — — — — Net benefit cost (credit) $ 119 $ (361 ) $ 25 $ 699 $ 254 $ 318

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss, net of tax	Components of Accumulated Other Comprehensive Loss, net of tax, within the Condensed Consolidated Balance Sheets, are as follows: September 30, 2018 December 31, 2017 Foreign currency translation adjustments $ (29,456 ) $ (15,778 ) Pension and retiree medical benefits (1,661 ) (1,610 ) Cash flow hedge (7,116 ) (4,935 ) Total Accumulated Other Comprehensive Loss $ (38,233 ) $ (22,323 )
Changes in components of Accumulated Other Comprehensive Loss, net of tax	The changes in components of Accumulated Other Comprehensive Loss, net of tax, are as follows: Foreign Currency Translation Adjustments Pension and Post Retirement Benefits Cash Flow Hedge Total December 31, 2017 $ (15,778 ) $ (1,610 ) $ (4,935 ) $ (22,323 ) Other comprehensive (loss) income before reclassifications (13,678 ) 19 4,889 (8,770 ) Amounts reclassified from Accumulated Other Comprehensive Loss — 67 (5,944 ) (5,877 ) Adjustments to Accumulated Other Comprehensive Loss for disproportionate income tax effects recognized from the adoption of ASU 2018-02 — (137 ) (1,126 ) (1,263 ) Net current period other comprehensive loss (13,678 ) (51 ) (2,181 ) (15,910 ) September 30, 2018 $ (29,456 ) $ (1,661 ) $ (7,116 ) $ (38,233 )

Earnings (Loss) Attributable _2

Earnings (Loss) Attributable to Tennant Company Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings (Loss) per Share	The computations of Basic and Diluted Earnings (Loss) per Share were as follows: Three Months Ended Nine Months Ended September 30 September 30 2018 2017 2018 2017 Numerator: Net Earnings (Loss) Attributable to Tennant Company $ 9,676 $ 3,559 $ 25,694 $ (2,989 ) Denominator: Basic - Weighted Average Shares Outstanding 17,998,917 17,729,857 17,911,880 17,673,656 Effect of dilutive securities: Share-based compensation plans 440,704 441,587 432,933 — Diluted - Weighted Average Shares Outstanding 18,439,621 18,171,444 18,344,813 17,673,656 Basic Earnings (Loss) per Share $ 0.54 $ 0.20 $ 1.43 $ (0.17 ) Diluted Earnings (Loss) per Share $ 0.52 $ 0.20 $ 1.40 $ (0.17 )

Separate Financial Informatio_2

Separate Financial Information of Guarantor Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidated Statements of Operations	Condensed Consolidated Statement of Operations For the three months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 126,110 $ 160,226 $ 131,418 $ (144,499 ) $ 273,255 Cost of Sales 86,781 135,058 87,707 (144,376 ) 165,170 Gross Profit 39,329 25,168 43,711 (123 ) 108,085 Operating Expense: Research and Development Expense 6,096 279 1,131 — 7,506 Selling and Administrative Expense 26,765 18,091 39,473 811 85,140 Total Operating Expense 32,861 18,370 40,604 811 92,646 Profit from Operations 6,468 6,798 3,107 (934 ) 15,439 Other Income (Expense): Equity in Earnings of Affiliates 5,256 262 205 (5,723 ) — Interest (Expense) Income, Net (5,230 ) — 92 (9 ) (5,147 ) Intercompany Interest Income (Expense) 3,621 (1,450 ) (2,171 ) — — Net Foreign Currency Transaction (Losses) Gains (69 ) 4 (230 ) — (295 ) Other Expense, Net (179 ) (473 ) (263 ) 785 (130 ) Total Other Income (Expense), Net 3,399 (1,657 ) (2,367 ) (4,947 ) (5,572 ) Profit Before Income Taxes 9,867 5,141 740 (5,881 ) 9,867 Income Tax Expense (Benefit) 158 1,230 (865 ) (365 ) 158 Net Earnings Including Noncontrolling Interest 9,709 3,911 1,605 (5,516 ) 9,709 Net Earnings Attributable to Noncontrolling Interest 33 — 33 (33 ) 33 Net Earnings Attributable to Tennant Company $ 9,676 $ 3,911 $ 1,572 $ (5,483 ) $ 9,676 Condensed Consolidated Statement of Operations For the nine months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 366,093 $ 472,524 $ 422,887 $ (423,205 ) $ 838,299 Cost of Sales 249,065 395,327 278,207 (421,821 ) 500,778 Gross Profit 117,028 77,197 144,680 (1,384 ) 337,521 Operating Expense: Research and Development Expense 18,625 825 3,958 — 23,408 Selling and Administrative Expense 84,478 57,151 126,833 811 269,273 Total Operating Expense 103,103 57,976 130,791 811 292,681 Profit from Operations 13,925 19,221 13,889 (2,195 ) 44,840 Other Income (Expense): Equity in Earnings of Affiliates 19,657 1,356 4,234 (25,247 ) — Interest (Expense) Income, Net (15,726 ) — 558 (28 ) (15,196 ) Intercompany Interest Income (Expense) 10,989 (4,308 ) (6,681 ) — — Net Foreign Currency Transaction Losses (354 ) (2 ) (1,025 ) — (1,381 ) Other (Expense) Income, Net (1,118 ) (1,610 ) 1,113 725 (890 ) Total Other Income (Expense), Net 13,448 (4,564 ) (1,801 ) (24,550 ) (17,467 ) Profit Before Income Taxes 27,373 14,657 12,088 (26,745 ) 27,373 Income Tax Expense 1,598 3,520 705 (4,225 ) 1,598 Net Earnings Including Noncontrolling Interest 25,775 11,137 11,383 (22,520 ) 25,775 Net Earnings Attributable to Noncontrolling Interest 81 — 81 (81 ) 81 Net Earnings Attributable to Tennant Company $ 25,694 $ 11,137 $ 11,302 $ (22,439 ) $ 25,694 Condensed Consolidated Statement of Operations For the three months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 111,835 $ 146,495 $ 131,457 $ (127,866 ) $ 261,921 Cost of Sales 76,974 120,523 88,411 (128,591 ) 157,317 Gross Profit 34,861 25,972 43,046 725 104,604 Operating Expense: Research and Development Expense 6,312 86 1,509 — 7,907 Selling and Administrative Expense 23,498 19,074 43,139 — 85,711 Total Operating Expense 29,810 19,160 44,648 — 93,618 Profit (Loss) from Operations 5,051 6,812 (1,602 ) 725 10,986 Other Income (Expense): Equity in Earnings of Affiliates 2,039 376 — (2,415 ) — Interest Expense, Net (5,275 ) — (111 ) (9 ) (5,395 ) Intercompany Interest Income (Expense) 3,774 (1,455 ) (2,319 ) — — Net Foreign Currency Transaction Gains (Losses) 357 2 (1,201 ) — (842 ) Other (Expense) Income, Net (1,619 ) (204 ) 1,424 (23 ) (422 ) Total Other Expense, Net (724 ) (1,281 ) (2,207 ) (2,447 ) (6,659 ) Profit (Loss) Before Income Taxes 4,327 5,531 (3,809 ) (1,722 ) 4,327 Income Tax Expense 731 2,034 2,819 (4,853 ) 731 Net Earnings (Loss) Including Noncontrolling Interest 3,596 3,497 (6,628 ) 3,131 3,596 Net Earnings Attributable to Noncontrolling Interest 37 — 37 (37 ) 37 Net Earnings (Loss) Attributable to Tennant Company $ 3,559 $ 3,497 $ (6,665 ) $ 3,168 $ 3,559 Condensed Consolidated Statement of Operations For the nine months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Sales $ 337,034 $ 442,090 $ 331,491 $ (386,844 ) $ 723,771 Cost of Sales 230,753 363,034 228,838 (387,748 ) 434,877 Gross Profit 106,281 79,056 102,653 904 288,894 Operating Expense: Research and Development Expense 20,838 245 3,156 — 24,239 Selling and Administrative Expense 85,697 58,881 102,415 — 246,993 Total Operating Expense 106,535 59,126 105,571 — 271,232 (Loss) Profit from Operations (254 ) 19,930 (2,918 ) 904 17,662 Other Income (Expense): Equity in Earnings of Affiliates 7,493 1,500 — (8,993 ) — Interest Expense, Net (16,866 ) — (257 ) (22 ) (17,145 ) Intercompany Interest Income (Expense) 8,742 (4,323 ) (4,419 ) — — Net Foreign Currency Transaction Gains (Losses) 553 — (2,928 ) — (2,375 ) Other (Expense) Income, Net (2,300 ) (430 ) 2,014 (58 ) (774 ) Total Other Expense, Net (2,378 ) (3,253 ) (5,590 ) (9,073 ) (20,294 ) (Loss) Profit Before Income Taxes (2,632 ) 16,677 (8,508 ) (8,169 ) (2,632 ) Income Tax Expense 385 5,993 5,481 (11,474 ) 385 Net (Loss) Earnings Including Noncontrolling Interest (3,017 ) 10,684 (13,989 ) 3,305 (3,017 ) Net Loss Attributable to Noncontrolling Interest (28 ) — (28 ) 28 (28 ) Net (Loss) Earnings Attributable to Tennant Company $ (2,989 ) $ 10,684 $ (13,961 ) $ 3,277 $ (2,989 )
Condensed Consolidated Statements of Comprehensive Income	Condensed Consolidated Statement of Comprehensive Income For the three months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Earnings Including Noncontrolling Interest $ 9,709 $ 3,911 $ 1,605 $ (5,516 ) $ 9,709 Other Comprehensive Loss: Foreign currency translation adjustments (3,110 ) 228 (3,664 ) 3,436 (3,110 ) Pension and retiree medical benefits 12 — — — 12 Cash flow hedge (28 ) — — — (28 ) Income Taxes: Foreign currency translation adjustments 280 — 280 (280 ) 280 Pension and retiree medical benefits (2 ) — — — (2 ) Cash flow hedge 6 — — — 6 Total Other Comprehensive Loss, net of tax (2,842 ) 228 (3,384 ) 3,156 (2,842 ) Total Comprehensive Income (Loss) Including Noncontrolling Interest 6,867 4,139 (1,779 ) (2,360 ) 6,867 Comprehensive Income Attributable to Noncontrolling Interest 33 — 33 (33 ) 33 Comprehensive Income (Loss) Attributable to Tennant Company $ 6,834 $ 4,139 $ (1,812 ) $ (2,327 ) $ 6,834 Condensed Consolidated Statement of Comprehensive Income For the nine months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Earnings Including Noncontrolling Interest $ 25,775 $ 11,137 $ 11,383 $ (22,520 ) $ 25,775 Other Comprehensive Loss: Foreign currency translation adjustments (14,202 ) (262 ) (20,103 ) 20,365 (14,202 ) Pension and retiree medical benefits 105 — 19 (19 ) 105 Cash flow hedge (1,367 ) — — — (1,367 ) Income Taxes: Foreign currency translation adjustments 524 — 524 (524 ) 524 Pension and retiree medical benefits (156 ) — — — (156 ) Cash flow hedge (814 ) — — — (814 ) Total Other Comprehensive Loss, net of tax (15,910 ) (262 ) (19,560 ) 19,822 (15,910 ) Total Comprehensive Income (Loss) Including Noncontrolling Interest 9,865 10,875 (8,177 ) (2,698 ) 9,865 Comprehensive Income Attributable to Noncontrolling Interest 81 — 81 (81 ) 81 Comprehensive Income (Loss) Attributable to Tennant Company $ 9,784 $ 10,875 $ (8,258 ) $ (2,617 ) $ 9,784 Condensed Consolidated Statement of Comprehensive Income For the three months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net Earnings (Loss) Including Noncontrolling Interest $ 3,596 $ 3,497 $ (6,628 ) $ 3,131 $ 3,596 Other Comprehensive Income (Loss): Foreign currency translation adjustments 9,033 289 9,221 (9,510 ) 9,033 Pension and retiree medical benefits 379 — 10 (10 ) 379 Cash flow hedge (1,732 ) — — — (1,732 ) Income Taxes: Foreign currency translation adjustments — — — — — Pension and retiree medical benefits (138 ) — — — (138 ) Cash flow hedge 646 — — — 646 Total Other Comprehensive Income, net of tax 8,188 289 9,231 (9,520 ) 8,188 Total Comprehensive Income Including Noncontrolling Interest 11,784 3,786 2,603 (6,389 ) 11,784 Comprehensive Income Attributable to Noncontrolling Interest 37 — 37 (37 ) 37 Comprehensive Income Attributable to Tennant Company $ 11,747 $ 3,786 $ 2,566 $ (6,352 ) $ 11,747 Condensed Consolidated Statement of Comprehensive Income For the nine months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company Net (Loss) Earnings Including Noncontrolling Interest $ (3,017 ) $ 10,684 $ (13,989 ) $ 3,305 $ (3,017 ) Other Comprehensive Income (Loss): Foreign currency translation adjustments 25,073 693 1,330 (2,023 ) 25,073 Pension and retiree medical benefits 541 — 151 (151 ) 541 Cash flow hedge (6,311 ) — — — (6,311 ) Income Taxes: Foreign currency translation adjustments — — — — — Pension and retiree medical benefits (160 ) — (15 ) 15 (160 ) Cash flow hedge 2,354 — — — 2,354 Total Other Comprehensive Income, net of tax 21,497 693 1,466 (2,159 ) 21,497 Total Comprehensive Income (Loss) Including Noncontrolling Interest 18,480 11,377 (12,523 ) 1,146 18,480 Comprehensive (Loss) Income Attributable to Noncontrolling Interest (28 ) — (28 ) 28 (28 ) Comprehensive Income (Loss) Attributable to Tennant Company $ 18,508 $ 11,377 $ (12,495 ) $ 1,118 $ 18,508
Condensed Consolidated Balance Sheets	Condensed Consolidated Balance Sheet As of September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company ASSETS Current Assets: Cash and Cash Equivalents $ 18,082 $ 668 $ 34,723 $ — $ 53,473 Restricted Cash — — 534 — 534 Net Receivables 494 93,464 114,161 — 208,119 Intercompany Receivables 31,488 142,708 — (174,196 ) — Inventories 35,858 15,118 99,220 (10,403 ) 139,793 Prepaid Expenses 17,673 705 9,978 — 28,356 Other Current Assets 4,691 340 3,834 — 8,865 Total Current Assets 108,286 253,003 262,450 (184,599 ) 439,140 Property, Plant and Equipment 228,237 12,533 140,673 — 381,443 Accumulated Depreciation (156,476 ) (6,459 ) (54,690 ) — (217,625 ) Property, Plant and Equipment, Net 71,761 6,074 85,983 — 163,818 Deferred Income Taxes 3,127 3,078 8,857 — 15,062 Investment in Affiliates 403,903 12,133 18,487 (434,523 ) — Intercompany Loans 303,670 — 3,997 (307,667 ) — Goodwill 12,870 1,726 170,023 — 184,619 Intangible Assets, Net 4,210 2,738 146,026 — 152,974 Other Assets 6,057 — 8,896 — 14,953 Total Assets $ 913,884 $ 278,752 $ 704,719 $ (926,789 ) $ 970,566 LIABILITIES AND TOTAL EQUITY Current Liabilities: Current Portion of Long-Term Debt $ 29,705 $ — $ 1,294 $ — $ 30,999 Accounts Payable 34,447 6,727 49,604 — 90,778 Intercompany Payables 143,095 — 31,101 (174,196 ) — Employee Compensation and Benefits 10,588 12,873 18,696 — 42,157 Income Taxes Payable 469 — 2,801 (298 ) 2,972 Other Current Liabilities 28,216 14,348 28,980 298 71,842 Total Current Liabilities 246,520 33,948 132,476 (174,196 ) 238,748 Long-Term Liabilities: Long-Term Debt 315,277 — 1,660 — 316,937 Intercompany Loans 3,997 128,000 175,670 (307,667 ) — Employee-Related Benefits 11,519 1,916 8,393 — 21,828 Deferred Income Taxes — — 48,491 — 48,491 Other Liabilities 27,488 3,336 4,655 — 35,479 Total Long-Term Liabilities 358,281 133,252 238,869 (307,667 ) 422,735 Total Liabilities 604,801 167,200 371,345 (481,863 ) 661,483 Equity: Common Stock 6,796 — 11,131 (11,131 ) 6,796 Additional Paid-In Capital 26,087 77,551 388,216 (465,767 ) 26,087 Retained Earnings 312,539 34,932 (9,916 ) (25,016 ) 312,539 Accumulated Other Comprehensive Loss (38,233 ) (931 ) (57,951 ) 58,882 (38,233 ) Total Tennant Company Shareholders' Equity 307,189 111,552 331,480 (443,032 ) 307,189 Noncontrolling Interest 1,894 — 1,894 (1,894 ) 1,894 Total Equity 309,083 111,552 333,374 (444,926 ) 309,083 Total Liabilities and Total Equity $ 913,884 $ 278,752 $ 704,719 $ (926,789 ) $ 970,566 Condensed Consolidated Balance Sheet As of December 31, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company ASSETS Current Assets: Cash and Cash Equivalents $ 18,469 $ 507 $ 39,422 $ — $ 58,398 Restricted Cash — — 653 — 653 Net Receivables 683 88,629 120,204 — 209,516 Intercompany Receivables 53,444 133,778 — (187,222 ) — Inventories 29,450 12,695 94,542 (8,993 ) 127,694 Prepaid Expenses 8,774 1,172 9,405 — 19,351 Other Current Assets 4,030 — 3,473 — 7,503 Total Current Assets 114,850 236,781 267,699 (196,215 ) 423,115 Property, Plant and Equipment 225,064 12,155 145,549 — 382,768 Accumulated Depreciation (146,320 ) (6,333 ) (50,097 ) — (202,750 ) Property, Plant and Equipment, Net 78,744 5,822 95,452 — 180,018 Deferred Income Taxes 1,308 2,669 7,157 — 11,134 Investment in Affiliates 392,486 11,273 20,811 (424,570 ) — Intercompany Loans 304,822 — 4,983 (309,805 ) — Goodwill 12,869 1,739 171,436 — 186,044 Intangible Assets, Net 2,105 2,898 167,344 — 172,347 Other Assets 10,363 — 10,956 — 21,319 Total Assets $ 917,547 $ 261,182 $ 745,838 $ (930,590 ) $ 993,977 LIABILITIES AND TOTAL EQUITY Current Liabilities: Current Portion of Long-Term Debt $ 29,413 $ — $ 1,470 $ — $ 30,883 Accounts Payable 39,927 3,018 53,137 — 96,082 Intercompany Payables 133,778 1,963 51,481 (187,222 ) — Employee Compensation and Benefits 8,311 10,355 18,591 — 37,257 Income Taxes Payable 366 — 2,472 — 2,838 Other Current Liabilities 20,183 15,760 33,504 — 69,447 Total Current Liabilities 231,978 31,096 160,655 (187,222 ) 236,507 Long-Term Liabilities: Long-Term Debt 344,147 — 1,809 — 345,956 Intercompany Loans — 128,000 181,805 (309,805 ) — Employee-Related Benefits 11,160 3,992 8,715 — 23,867 Deferred Income Taxes — — 53,225 — 53,225 Other Liabilities 31,788 2,483 1,677 — 35,948 Total Long-Term Liabilities 387,095 134,475 247,231 (309,805 ) 458,996 Total Liabilities 619,073 165,571 407,886 (497,027 ) 695,503 Equity: Common Stock 6,705 — 11,131 (11,131 ) 6,705 Additional Paid-In Capital 15,089 72,483 384,460 (456,943 ) 15,089 Retained Earnings 297,032 23,797 (21,219 ) (2,578 ) 297,032 Accumulated Other Comprehensive Loss (22,323 ) (669 ) (38,391 ) 39,060 (22,323 ) Total Tennant Company Shareholders' Equity 296,503 95,611 335,981 (431,592 ) 296,503 Noncontrolling Interest 1,971 — 1,971 (1,971 ) 1,971 Total Equity 298,474 95,611 337,952 (433,563 ) 298,474 Total Liabilities and Total Equity $ 917,547 $ 261,182 $ 745,838 $ (930,590 ) $ 993,977
Condensed Consolidated Statement Cash Flows	Condensed Consolidated Statement of Cash Flows For the nine months ended September 30, 2018 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities $ 43,661 $ 219 $ (411 ) $ — $ 43,469 INVESTING ACTIVITIES Purchases of Property, Plant and Equipment (4,505 ) (58 ) (8,205 ) — (12,768 ) Proceeds from Disposals of Property, Plant and Equipment 20 — 88 — 108 Proceeds from Principal Payments Received on Long-Term Note Receivable — — 828 — 828 Proceeds from Sale of Business — — 4,000 — 4,000 Purchase of Intangible Assets (2,500 ) — (107 ) — (2,607 ) Change in Investments in Subsidiaries (1,817 ) — — 1,817 — Loan Payments from Subsidiaries 1,218 — — (1,218 ) — Loan Payments from Parent — — 986 (986 ) — Net Cash Used in Investing Activities (7,584 ) (58 ) (2,410 ) (387 ) (10,439 ) FINANCING ACTIVITIES Payments of Long-Term Debt (30,000 ) — (216 ) — (30,216 ) Change in Capital Lease Obligations — — 7 — 7 Change in Subsidiary Equity — — 1,817 (1,817 ) — Loan Payments to Parent — — (1,218 ) 1,218 — Loan Payments to Subsidiaries (986 ) — — 986 — Proceeds from Issuances of Common Stock 5,735 — — — 5,735 Dividends Paid (11,356 ) — — — (11,356 ) Net Cash (Used in) Provided by Financing Activities (36,607 ) — 390 387 (35,830 ) Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash 143 — (2,387 ) — (2,244 ) Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash (387 ) 161 (4,818 ) — (5,044 ) Cash, Cash Equivalents and Restricted Cash at Beginning of Period 18,469 507 40,075 — 59,051 Cash, Cash Equivalents and Restricted Cash at End of Period $ 18,082 $ 668 $ 35,257 $ — $ 54,007 Condensed Consolidated Statement of Cash Flows For the nine months ended September 30, 2017 (in thousands) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Total Tennant Company OPERATING ACTIVITIES Net Cash (Used in) Provided by Operating Activities $ (555 ) $ 798 $ 31,880 $ — $ 32,123 INVESTING ACTIVITIES Purchases of Property, Plant and Equipment (7,400 ) — (8,839 ) — (16,239 ) Proceeds from Disposals of Property, Plant and Equipment 17 — 2,439 — 2,456 Proceeds from Principal Payments Received on Long-Term Note Receivable — — 500 — 500 Issuance of Long-Term Note Receivable — — (1,500 ) — (1,500 ) Acquisition of Businesses, Net of Cash Acquired (304 ) — (353,231 ) — (353,535 ) Purchase of Intangible Asset (2,500 ) — — — (2,500 ) Change in Investments in Subsidiaries (193,639 ) — — 193,639 — Loan (Payments) Borrowings from Subsidiaries (159,780 ) — — 159,780 — Net Cash Used in Investing Activities (363,606 ) — (360,631 ) 353,419 (370,818 ) FINANCING ACTIVITIES Proceeds from Short-Term Debt 300,000 — — — 300,000 Repayments of Short-Term Debt (300,000 ) — — — (300,000 ) Loan Borrowings (Payments) from Parent — — 159,780 (159,780 ) — Change in Subsidiary Equity — — 193,639 (193,639 ) — Proceeds from Issuance of Long-Term Debt 440,000 — — — 440,000 Payments of Long-Term Debt (81,143 ) — (119 ) — (81,262 ) Payments of Debt Issuance Costs (16,465 ) — — — (16,465 ) Proceeds from Issuance of Common Stock 4,728 — — — 4,728 Dividends Paid (11,204 ) — — — (11,204 ) Net Cash Provided by Financing Activities 335,916 — 353,300 (353,419 ) 335,797 Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash (68 ) — 1,655 — 1,587 Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash (28,313 ) 798 26,204 — (1,311 ) Cash, Cash Equivalents and Restricted Cash at Beginning of Period 38,484 226 19,840 — 58,550 Cash, Cash Equivalents and Restricted Cash at End of Period $ 10,171 $ 1,024 $ 46,044 $ — $ 57,239

Newly Adopted Accounting Pron_3

Newly Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Net Receivables	$ 208,119	$ 209,516
Total Current Assets	439,140	423,115
Total Assets	970,566	993,977
LIABILITIES
Other Current Liabilities	71,842	69,447
Total Current Liabilities	238,748	236,507
Total Liabilities	661,483	$ 695,503
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
ASSETS
Net Receivables	1,159
Total Current Assets	1,159
Total Assets	1,159
LIABILITIES
Other Current Liabilities	1,159
Total Current Liabilities	1,159
Total Liabilities	1,159
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
ASSETS
Net Receivables	206,960
Total Current Assets	437,981
Total Assets	969,407
LIABILITIES
Other Current Liabilities	70,683
Total Current Liabilities	237,589
Total Liabilities	$ 660,324

Newly Adopted Accounting Pron_4

Newly Adopted Accounting Pronouncements (Details 2) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Jan. 01, 2018
Selling and Administrative Expense | Scenario, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost (credit)	$ (60)	$ 74
Other Expense, Net | Scenario, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost (credit)	$ (60)	$ 74
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 94
ASU 2016-16, Increase (Decrease) in long-term deferred charge			1,281
Deferred Tax Asset, Intra-entity Transfer, Asset Other than Inventory			1,187
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			$ 1,263

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 273,255	$ 261,921	$ 838,299	$ 723,771
Sales Direct to Consumer
Disaggregation of Revenue [Line Items]
Revenue, Net	180,901	172,484	547,079	490,533
Sales to Distributors
Disaggregation of Revenue [Line Items]
Revenue, Net	92,354	89,437	291,220	233,238
Equipment
Disaggregation of Revenue [Line Items]
Revenue, Net	178,165	165,203	542,317	455,311
Parts and Consumables
Disaggregation of Revenue [Line Items]
Revenue, Net	53,639	53,535	168,491	149,260
Specialty Surface Coatings
Disaggregation of Revenue [Line Items]
Revenue, Net	7,139	8,007	21,434	22,491
Services and Other
Disaggregation of Revenue [Line Items]
Revenue, Net	34,312	35,176	106,057	96,709
Americas
Disaggregation of Revenue [Line Items]
Revenue, Net	175,341	161,037	516,731	472,953
EMEA
Disaggregation of Revenue [Line Items]
Revenue, Net	74,254	78,851	250,480	189,483
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 23,660	$ 22,033	$ 71,088	$ 61,335

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Details 2) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Contract with Customer, Contract Liability [Roll Forward]
Beginning balance	$ 13,466
Additions to sales incentive accrual	22,078
Contract payments	(21,677)
Foreign currency fluctuations	(239)
Ending balance	$ 13,628

Revenue from Contracts with C_5

Revenue from Contracts with Customers (Details 3) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Deferred Revenue, Current		$ 5,064	$ 5,304
Deferred Revenue, Noncurrent		3,140	2,483
Movement in Deferred Revenue [Roll Forward]
Beginning balance	$ 7,787
Increase in deferred revenue representing our obligation to satisfy future performance obligations	11,032
Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations	(10,475)
Foreign currency fluctuations	(140)
Ending balance	8,204
Revenue, Performance Obligation Satisfied over Time [Abstract]
Remaining 2,018		2,502
2,019		2,958
2,020		1,595
2,021		692
2,022		381
Thereafter		76
Total	$ 7,787	$ 8,204	$ 7,787
Prepaid Maintenance Contract Duration, Minimum
Disaggregation of Revenue [Line Items]
Standard Prepaid Maintenance Contract Time Period	12 months
Prepaid Maintenance Contract Duration, Maximum
Disaggregation of Revenue [Line Items]
Standard Prepaid Maintenance Contract Time Period	60 months

Management Actions (Details)

Management Actions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2017	Mar. 31, 2017	Sep. 30, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Approximate time anticipated savings will offset the restructuring charge	1 year	1 year
Restructuring Reserve [Roll Forward]
Restructuring Charges, net of noncash expenses				$ 9,558
Restructuring Reserve beginning balance			$ 3,436
Cash Payments			(1,694)	(6,312)
Foreign currency adjustments			(64)	190
Restructuring Reserve ending balance	$ 3,436		$ 1,678	$ 3,436
Selling and Administrative Expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 2,501	$ 8,018
Other associated restructuring charges		$ 961

Acquisitions and Divestitures_3

Acquisitions and Divestitures (Details 1) - USD ($)	Sep. 04, 2018	Apr. 06, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses					$ 4,000,000	$ 0
Gain on Sale of Business					1,000,000
Purchase accounting adjustments					4,627,000
Amortization of Intangible Assets			$ 5,720,000	$ 7,650,000	$ 17,378,000	$ 11,430,000
Trade Names
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					10 years		10 years
Customer Lists
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					15 years		15 years
Technology
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					11 years		11 years
Senior Secured Credit Facility
Business Acquisition [Line Items]
Long-term Line of Credit, Noncurrent		$ 420,000,000
IP Cleaning S.p.A
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity		IP Cleaning S.p.A. and its subsidiaries ("IPC Group")
Business Combination, Consideration Transferred		$ 353,769,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Cash Equivalents		8,804,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount		$ 0
Purchase accounting adjustments					$ 4,627,000
Amortization of Intangible Assets			$ 5,401,000		$ 16,424,000
IP Cleaning S.p.A | Trade Names
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
IP Cleaning S.p.A | Customer Lists
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
IP Cleaning S.p.A | Technology
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Gaomei
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity	Hefei Gaomei Cleaning Machines Co., Ltd. and Anhui Rongen Environmental Protection Technology Co., Ltd (collectively "Gaomei")

Acquisitions and Divestitures_4

Acquisitions and Divestitures (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Apr. 06, 2017
LIABILITIES
Goodwill	$ 184,619	$ 186,044
IP Cleaning S.p.A
ASSETS
Receivables			$ 39,984
Inventories			46,442
Other Current Assets			7,456
Assets Held for Sale			2,247
Property, Plant and Equipment			63,890
Intangible Assets Subject to Amortization:			159,445
Other Assets			2,000
Total Identifiable Assets Acquired			321,464
LIABILITIES
Accounts Payable			32,227
Accrued Expenses			18,130
Deferred Income Taxes			56,950
Other Liabilities			10,964
Total Identifiable Liabilities Assumed			118,271
Net Identifiable Assets Acquired			203,193
Noncontrolling Interest			(1,896)
Goodwill			152,472
Total Purchase Price, net of Cash Acquired			353,769
Trade Names | IP Cleaning S.p.A
ASSETS
Intangible Assets Subject to Amortization:			26,753
Customer Lists | IP Cleaning S.p.A
ASSETS
Intangible Assets Subject to Amortization:			123,061
Technology | IP Cleaning S.p.A
ASSETS
Intangible Assets Subject to Amortization:			$ 9,631

Acquisitions and Divestitures_5

Acquisitions and Divestitures (Details 3) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Sales
Pro forma		$ 261,921		$ 777,832
As reported	$ 273,255	261,921	$ 838,299	723,771
Net Earnings (Loss) Attributable to Tennant Company
Pro forma		5,800		14,875
As reported	$ 9,676	$ 3,559	$ 25,694	$ (2,989)
Net Earnings (Loss) Attributable to Tennant Company per Share
Pro forma		$ 0.32		$ 0.84
As reported	$ 0.52	$ 0.20	$ 1.40	$ (0.17)

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventories carried at LIFO:
Finished goods	$ 48,471	$ 43,439
Raw materials, production parts and work-in-process	28,994	23,694
LIFO reserve	(30,668)	(28,429)
Total LIFO inventories	46,797	38,704
Inventories carried at FIFO:
Finished goods	53,138	54,161
Raw materials, production parts and work-in-process	39,858	34,829
Total FIFO inventories	92,996	88,990
Total inventories	$ 139,793	$ 127,694

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Goodwill, Gross
Balance, beginning of period			$ 227,224
Purchase accounting adjustments			4,627
Foreign currency fluctuations			(7,542)
Balance, end of period	$ 224,309		224,309		$ 227,224
Accumulated Impairment Losses
Balance, beginning of period			(41,180)
Foreign currency fluctuations			1,490
Balance, end of period	(39,690)		(39,690)		(41,180)
Goodwill, Net
Balance, beginning of period			186,044
Purchase accounting adjustments			4,627
Foreign currency fluctuations			(6,052)
Balance, end of period	184,619		184,619		186,044
Acquired Finite-lived Intangible Assets
Original cost	192,839		192,839		195,912
Accumulated amortization	(39,865)		(39,865)		(23,565)
Carrying value	152,974		152,974		172,347
Purchase of Intangible Assets			2,607	$ 2,500
Amortization expense	5,720	$ 7,650	17,378	$ 11,430
Estimated aggregate amortization expense of Intangible Assets
Remaining 2,018	5,456		5,456
2,019	21,268		21,268
2,020	19,827		19,827
2,021	18,244		18,244
2,022	15,965		15,965
Thereafter	72,214		72,214
Total	152,974		152,974
Customer Lists
Acquired Finite-lived Intangible Assets
Original cost	144,760		144,760		149,355
Accumulated amortization	(29,908)		(29,908)		(17,870)
Carrying value	114,852		$ 114,852		$ 131,485
Weighted-average original life (in years)			15 years		15 years
Trade Names
Acquired Finite-lived Intangible Assets
Original cost	30,945		$ 30,945		$ 31,968
Accumulated amortization	(4,631)		(4,631)		(2,436)
Carrying value	26,314		$ 26,314		$ 29,532
Weighted-average original life (in years)			10 years		10 years
Technology
Acquired Finite-lived Intangible Assets
Original cost	17,134		$ 17,134		$ 14,589
Accumulated amortization	(5,326)		(5,326)		(3,259)
Carrying value	$ 11,808		$ 11,808		$ 11,330
Weighted-average original life (in years)			11 years		11 years
Purchase of Intangible Assets			$ 2,500

Debt (Details 1)

Debt (Details 1)	9 Months Ended
	Sep. 30, 2018USD ($)
Line of Credit Facility
Letters of Credit Outstanding, Amount	$ 5,724,000
Line of Credit Facility, Commitment Fee Amount	$ 455,000
Debt, Weighted Average Interest Rate	5.40%
Debt, Weighted Average Interest Rate, net of Currency Swap Contract	4.50%
Revolving Credit Facility
Line of Credit Facility
Outstanding Borrowings	$ 20,000,000
Debt Instrument, Unused Borrowing Capacity, Amount	180,000,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	6,250,000
Long-term Debt, Additional Repayments of Principal in Next Twelve Months	23,750,000
Long-term Debt, Current Maturities	$ 30,000,000
Revolving Credit Facility | JPMorgan, 2017 Credit Agreement
Line of Credit Facility
Debt Instrument, Covenant, Indebtedness to Adjusted EBITDA Ratio, Maximum	4
Debt Instrument, Covenant, Adjusted EBITDA to Interest Expense Ratio, Maximum	3.50
Debt Instrument, Covenant, Senior Secured Net Indebtedness to Adjusted EBITDA Ratio, Maximum	3.50
Debt Instrument, Covenant, Net Leverage Ratio, Minimum	3
Line of Credit
Line of Credit Facility
Outstanding Borrowings	$ 30,000,000
Letter of Credit
Line of Credit Facility
Debt Instrument, Unused Borrowing Capacity, Amount	$ 174,276,000
Minimum | Revolving Credit Facility | JPMorgan, 2017 Credit Agreement
Line of Credit Facility
Debt Instrument, Covenant, Repayment of Debt, Percentage of Excess Cash Flow	25.00%
Maximum | Revolving Credit Facility | JPMorgan, 2017 Credit Agreement
Line of Credit Facility
Debt Instrument, Covenant, Repayment of Debt, Percentage of Excess Cash Flow	50.00%

Debt (Details 2)

Debt (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017
Debt Instrument
Total Debt	$ 352,955		$ 383,279
Debt Instrument, Unamortized Debt Issuance Costs, Noncurrent, net	(5,020)		(6,440)
Capital Lease Obligations, Current	1,294	[1]	1,470
Long-Term Portion	316,937		345,956
Current Portion of Long-Term Debt	30,999		30,883
Line of Credit
Debt Instrument
Debt, Current, Net Of Unamortized Debt Issuance Costs	(29,704)	[1]	(29,413)
Current Portion of Long-Term Debt	30,000
Debt Instrument, Unamortized Debt Issuance Costs, Current Portion, net	296
Capital Lease Obligations
Debt Instrument
Total Debt	2,955		3,279
JPMorgan, 2017 Credit Agreement | Line of Credit
Debt Instrument
Total Debt	50,000		80,000
Bonds
Debt Instrument
Total Debt	$ 300,000		$ 300,000
[1]	(1) Current maturities of long-term debt include $30,000 of current maturities, less $296 of unamortized debt issuance costs, under our 2017 Credit Agreement and $1,294 of current maturities of capital lease obligations.

Warranty (Details)

Warranty (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Product Warranties Disclosures [Abstract]
Machine warranty, range minimum (in years)	1 year
Machine warranty, range maximum (in years)	4 years
Period of time following a sale the majority of claims are paid, range minimum (in years)	6 months
Period of time following a sale the majority of claims are paid, range maximum (in years)	9 months
Changes in warranty reserves
Beginning balance	$ 12,676	$ 10,960
Additions charged to expense	10,883	8,879
Acquired warranty obligations	0	384
Foreign currency fluctuations	(193)	225
Claims paid	(9,805)	(8,912)
Ending balance	$ 13,561	$ 11,536

Derivatives (Details 1)

Derivatives (Details 1) $ in Thousands		1 Months Ended	9 Months Ended
		Apr. 30, 2022EUR (€)	Sep. 30, 2018EUR (€)	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2017USD ($)
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract			1 year	1 year
Cash Flow Hedge Loss to be Reclassified within Twelve Months				$ 2,129
Derivatives designated as hedging instruments | Foreign currency option contracts
Derivatives, Fair Value [Line Items]
Notional Amount					$ 8,737		$ 8,619
Fair Value Asset Derivatives	[1]				113		86
Fair Value Liability Derivatives	[1]				0		0
Derivatives designated as hedging instruments | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Notional Amount					2,952		2,928
Fair Value Asset Derivatives	[1]				7,038		7,218
Fair Value Liability Derivatives	[1]				29,868		34,961
Derivatives designated as hedging instruments | Cross currency swap
Derivatives, Fair Value [Line Items]
Notional Amount | €			€ 175,800,000			€ 181,200,000
Aggregate scheduled interest payments over the course of the loan and related swaps | €			€ 25,800,000
Derivatives designated as hedging instruments | Cross currency swap | Scenario, Forecast
Derivatives, Fair Value [Line Items]
Scheduled maturity and principal payment of the loan and related swaps | €		€ 150,000,000
Derivatives not designated as hedging instruments | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Notional Amount					47,614		60,858
Fair Value Asset Derivatives	[1]				653		442
Fair Value Liability Derivatives	[1]				$ 358		$ 425
[1]	Contracts that mature within the next 12 months are included in Other Current Assets and Other Current Liabilities for asset derivatives and liability derivatives, respectively, on our Condensed Consolidated Balance Sheets. Contracts with maturities greater than 12 months are included in Other Assets and Other Liabilities for asset derivatives and liability derivatives, respectively, in our Condensed Consolidated Balance Sheets. Amounts included in our Condensed Consolidated Balance Sheets are recorded net where a right of offset exists with the same derivative counterparty.

Derivatives (Details 2)

Derivatives (Details 2) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Foreign currency option contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in earnings	[1]	$ 0	$ 0	$ 0	$ (1,132)
Foreign currency option contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax	[2]	(89)	(40)	(40)	(177)
Net (loss) gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales		(7)	(141)	(91)	(140)
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income		0	0	0	0
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses		0	0	0	0
Net (loss) gain recognized in earnings	[3]	(5)	(7)	3	(12)
Foreign currency forward contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in earnings	[1]	(658)	(2,062)	1,174	(7,369)
Foreign currency forward contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax	[2]	1,253	(4,492)	4,929	(14,026)
Net (loss) gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales		(33)	26	(34)	(76)
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income		487	374	1,345	823
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses		739	(3,705)	4,724	(10,853)
Net (loss) gain recognized in earnings	[3]	$ 2	$ 3	$ 8	$ 8
[1]	Classified in Net Foreign Currency Transaction Losses.
[2]	Net change in the fair value of the effective portion classified in Other Comprehensive (Loss) Income.
[3]	Ineffective portion and amount excluded from effectiveness testing classified in Net Foreign Currency Transaction Losses

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Level 1
Assets:
Total Assets	$ 0	$ 0
Liabilities:
Total Liabilities	0	0
Level 1 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	0	0
Liabilities:
Foreign currency contract, liability fair value	0	0
Level 1 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0	0
Level 2
Assets:
Total Assets	7,804	7,746
Liabilities:
Total Liabilities	30,226	35,386
Level 2 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	7,691	7,660
Liabilities:
Foreign currency contract, liability fair value	30,226	35,386
Level 2 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	113	86
Level 3
Assets:
Total Assets	0	0
Liabilities:
Total Liabilities	0	0
Level 3 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	0	0
Liabilities:
Foreign currency contract, liability fair value	0	0
Level 3 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0	0
Fair Value
Assets:
Total Assets	7,804	7,746
Liabilities:
Total Liabilities	30,226	35,386
Fair Value | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	7,691	7,660
Liabilities:
Foreign currency contract, liability fair value	30,226	35,386
Fair Value | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	$ 113	$ 86

Retirement Benefit Plans (Detai

Retirement Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Plan contributions	$ 36		$ 187
Pension Plans | Domestic Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	$ 0	0	$ 0
Interest cost	10	373	32	1,153
Expected return on plan assets	0	(581)	0	(1,752)
Amortization of net actuarial loss	13	12	37	33
Amortization of prior service cost	0	0	0	0
Foreign currency	0	0	0	0
Net periodic benefit cost (credit)	23	(196)	69	(566)
Settlement charge			50	205
Net benefit cost (credit)	23	(196)	119	(361)
Pension Plans | Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	33	124	105	172
Interest cost	82	96	240	315
Expected return on plan assets	(77)	(101)	(268)	(298)
Amortization of net actuarial loss	0	0	0	0
Amortization of prior service cost	54	50	160	146
Foreign currency	(118)	135	(212)	364
Net periodic benefit cost (credit)	(26)	304	25	699
Settlement charge			0	0
Net benefit cost (credit)	(26)	304	25	699
Postretirement Medical Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Plan contributions	139		695
Service cost	6	6	34	46
Interest cost	70	91	220	272
Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss	0	0	0	0
Amortization of prior service cost	0	0	0	0
Foreign currency	0	0	0	0
Net periodic benefit cost (credit)	76	97	254	318
Settlement charge			0	0
Net benefit cost (credit)	$ 76	$ 97	$ 254	$ 318

Commitments and Contingencies_2

Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Aggregate residual value at lease expiration for vehicle leases	$ 13,990
Guaranteed aggregate residual value at lease expiration for vehicle leases	8,371
Liability for the estimated end of term loss related to residual value guarantee	$ 317

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Equity [Abstract]
Foreign currency translation adjustments	$ (29,456)	$ (15,778)
Pension and retiree medical benefits	(1,661)	(1,610)
Cash flow hedge	(7,116)	(4,935)
Total Accumulated Other Comprehensive Loss	$ (38,233)	$ (22,323)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Components of Other Comprehensive Loss
December 31, 2017			$ (22,323)
Other comprehensive (loss) income before reclassifications			(8,770)
Amounts reclassified from Accumulated Other Comprehensive Loss			(5,877)
Adjustments to Accumulated Other Comprehensive Loss for disproportionate income tax effects recognized from the adoption of ASU 2018-02			(1,263)
Total Other Comprehensive (Loss) Income, net of tax	$ (2,842)	$ 8,188	(15,910)	$ 21,497
September 30, 2018	(38,233)		(38,233)
Foreign Currency Translation Adjustments
Components of Other Comprehensive Loss
December 31, 2017			(15,778)
Other comprehensive (loss) income before reclassifications			(13,678)
Amounts reclassified from Accumulated Other Comprehensive Loss			0
Adjustments to Accumulated Other Comprehensive Loss for disproportionate income tax effects recognized from the adoption of ASU 2018-02			0
Total Other Comprehensive (Loss) Income, net of tax			(13,678)
September 30, 2018	(29,456)		(29,456)
Pension and Post Retirement Benefits
Components of Other Comprehensive Loss
December 31, 2017			(1,610)
Other comprehensive (loss) income before reclassifications			19
Amounts reclassified from Accumulated Other Comprehensive Loss			67
Adjustments to Accumulated Other Comprehensive Loss for disproportionate income tax effects recognized from the adoption of ASU 2018-02			(137)
Total Other Comprehensive (Loss) Income, net of tax			(51)
September 30, 2018	(1,661)		(1,661)
Cash Flow Hedge
Components of Other Comprehensive Loss
December 31, 2017			(4,935)
Other comprehensive (loss) income before reclassifications			4,889
Amounts reclassified from Accumulated Other Comprehensive Loss			(5,944)
Adjustments to Accumulated Other Comprehensive Loss for disproportionate income tax effects recognized from the adoption of ASU 2018-02			(1,126)
Total Other Comprehensive (Loss) Income, net of tax			(2,181)
September 30, 2018	$ (7,116)		$ (7,116)

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefits	$ 6,067		$ 6,067
Unrecognized tax benefits, income tax penalties and interest accrued	489		489
Unrecognized tax benefits that would impact the effective tax rate	5,842		$ 5,842
Federal Statutory Income Tax Rate, Historical					35.00%
Tax Cuts and Jobs Act of 2017 Corporate Federal Tax Rate			21.00%
Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Transition Tax On Accumulated Foreign Earnings, Percent			(1.30%)
Income Tax Expense	$ 158	$ 731	$ 1,598	$ 385
Effective Income Tax Rate Reconciliation, Percent	1.60%		5.80%
Tax Cuts And Jobs Act Of 2017, Transition Tax Liability For Accumulated Foreign Earnings, Income Tax Expense			$ (362)
Other Tax Benefits			$ 3,568
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2,015
Minimum
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2,014
Maximum
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2,016

Share-Based Compensation (Detai

Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense	$ 1,893	$ 1,293	$ 6,008	$ 4,915
Excess Tax Benefit on Stock Plans			$ 2,073	1,149
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award
Shares granted			16,377
Weighted average grant date fair value, in dollars per share			$ 67.70
Vesting period of new awards granted			3 years
Fair value of shares vested			$ 863	$ 1,295

Earnings (Loss) Attributable _3

Earnings (Loss) Attributable to Tennant Company Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net Earnings (Loss) Attributable to Tennant Company	$ 9,676	$ 3,559	$ 25,694	$ (2,989)
Denominator:
Basic - Weighted Average Shares Outstanding	17,998,917	17,729,857	17,911,880	17,673,656
Effect of dilutive securities:
Share-based compensation plans	440,704	441,587	432,933	0
Diluted - Weighted Average Shares Outstanding	18,439,621	18,171,444	18,344,813	17,673,656
Basic Earnings (Loss) per Share	$ 0.54	$ 0.20	$ 1.43	$ (0.17)
Diluted Earnings (Loss) per Share	$ 0.52	$ 0.20	$ 1.40	$ (0.17)
Anti-dilutive securities excluded from earnings per share calculation	139,106	340,239	214,605	714,687

Segment Reporting (Details)

Segment Reporting (Details)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Number of operating segments	4
Number of reportable segments	1

Separate Financial Informatio_3

Separate Financial Information of Guarantor Subsidiaries Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Sales	$ 273,255	$ 261,921	$ 838,299	$ 723,771
Cost of Sales	165,170	157,317	500,778	434,877
Gross Profit	108,085	104,604	337,521	288,894
Operating Expense:
Research and Development Expense	7,506	7,907	23,408	24,239
Selling and Administrative Expense	85,140	85,711	269,273	246,993
Total Operating Expense	92,646	93,618	292,681	271,232
Profit from Operations	15,439	10,986	44,840	17,662
Other Income (Expense):
Equity in Earnings of Affiliates	0	0	0	0
Interest (Expense) Income, Net	(5,147)	(5,395)	(15,196)	(17,145)
Intercompany Interest Income (Expense)	0	0	0	0
Net Foreign Currency Transaction Losses	(295)	(842)	(1,381)	(2,375)
Other Expense, Net	(130)	(422)	(890)	(774)
Total Other Expense, Net	(5,572)	(6,659)	(17,467)	(20,294)
Profit (Loss) Before Income Taxes	9,867	4,327	27,373	(2,632)
Income Tax Expense	158	731	1,598	385
Net Earnings (Loss) Including Noncontrolling Interest	9,709	3,596	25,775	(3,017)
Net Earnings (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Net Earnings (Loss) Attributable to Tennant Company	9,676	3,559	25,694	(2,989)
Eliminations
Net Sales	(144,499)	(127,866)	(423,205)	(386,844)
Cost of Sales	(144,376)	(128,591)	(421,821)	(387,748)
Gross Profit	(123)	725	(1,384)	904
Operating Expense:
Research and Development Expense	0	0	0	0
Selling and Administrative Expense	811	0	811	0
Total Operating Expense	811	0	811	0
Profit from Operations	(934)	725	(2,195)	904
Other Income (Expense):
Equity in Earnings of Affiliates	(5,723)	(2,415)	(25,247)	(8,993)
Interest (Expense) Income, Net	(9)	(9)	(28)	(22)
Intercompany Interest Income (Expense)	0	0	0	0
Net Foreign Currency Transaction Losses	0	0	0	0
Other Expense, Net	785	(23)	725	(58)
Total Other Expense, Net	(4,947)	(2,447)	(24,550)	(9,073)
Profit (Loss) Before Income Taxes	(5,881)	(1,722)	(26,745)	(8,169)
Income Tax Expense	(365)	(4,853)	(4,225)	(11,474)
Net Earnings (Loss) Including Noncontrolling Interest	(5,516)	3,131	(22,520)	3,305
Net Earnings (Loss) Attributable to Noncontrolling Interest	(33)	(37)	(81)	28
Net Earnings (Loss) Attributable to Tennant Company	(5,483)	3,168	(22,439)	3,277
Parent
Net Sales	126,110	111,835	366,093	337,034
Cost of Sales	86,781	76,974	249,065	230,753
Gross Profit	39,329	34,861	117,028	106,281
Operating Expense:
Research and Development Expense	6,096	6,312	18,625	20,838
Selling and Administrative Expense	26,765	23,498	84,478	85,697
Total Operating Expense	32,861	29,810	103,103	106,535
Profit from Operations	6,468	5,051	13,925	(254)
Other Income (Expense):
Equity in Earnings of Affiliates	5,256	2,039	19,657	7,493
Interest (Expense) Income, Net	(5,230)	(5,275)	(15,726)	(16,866)
Intercompany Interest Income (Expense)	3,621	3,774	10,989	8,742
Net Foreign Currency Transaction Losses	(69)	357	(354)	553
Other Expense, Net	(179)	(1,619)	(1,118)	(2,300)
Total Other Expense, Net	3,399	(724)	13,448	(2,378)
Profit (Loss) Before Income Taxes	9,867	4,327	27,373	(2,632)
Income Tax Expense	158	731	1,598	385
Net Earnings (Loss) Including Noncontrolling Interest	9,709	3,596	25,775	(3,017)
Net Earnings (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Net Earnings (Loss) Attributable to Tennant Company	9,676	3,559	25,694	(2,989)
Guarantor Subsidiaries
Net Sales	160,226	146,495	472,524	442,090
Cost of Sales	135,058	120,523	395,327	363,034
Gross Profit	25,168	25,972	77,197	79,056
Operating Expense:
Research and Development Expense	279	86	825	245
Selling and Administrative Expense	18,091	19,074	57,151	58,881
Total Operating Expense	18,370	19,160	57,976	59,126
Profit from Operations	6,798	6,812	19,221	19,930
Other Income (Expense):
Equity in Earnings of Affiliates	262	376	1,356	1,500
Interest (Expense) Income, Net	0	0	0	0
Intercompany Interest Income (Expense)	(1,450)	(1,455)	(4,308)	(4,323)
Net Foreign Currency Transaction Losses	4	2	(2)	0
Other Expense, Net	(473)	(204)	(1,610)	(430)
Total Other Expense, Net	(1,657)	(1,281)	(4,564)	(3,253)
Profit (Loss) Before Income Taxes	5,141	5,531	14,657	16,677
Income Tax Expense	1,230	2,034	3,520	5,993
Net Earnings (Loss) Including Noncontrolling Interest	3,911	3,497	11,137	10,684
Net Earnings (Loss) Attributable to Noncontrolling Interest	0	0	0	0
Net Earnings (Loss) Attributable to Tennant Company	3,911	3,497	11,137	10,684
Non-Guarantor Subsidiaries
Net Sales	131,418	131,457	422,887	331,491
Cost of Sales	87,707	88,411	278,207	228,838
Gross Profit	43,711	43,046	144,680	102,653
Operating Expense:
Research and Development Expense	1,131	1,509	3,958	3,156
Selling and Administrative Expense	39,473	43,139	126,833	102,415
Total Operating Expense	40,604	44,648	130,791	105,571
Profit from Operations	3,107	(1,602)	13,889	(2,918)
Other Income (Expense):
Equity in Earnings of Affiliates	205	0	4,234	0
Interest (Expense) Income, Net	92	(111)	558	(257)
Intercompany Interest Income (Expense)	(2,171)	(2,319)	(6,681)	(4,419)
Net Foreign Currency Transaction Losses	(230)	(1,201)	(1,025)	(2,928)
Other Expense, Net	(263)	1,424	1,113	2,014
Total Other Expense, Net	(2,367)	(2,207)	(1,801)	(5,590)
Profit (Loss) Before Income Taxes	740	(3,809)	12,088	(8,508)
Income Tax Expense	(865)	2,819	705	5,481
Net Earnings (Loss) Including Noncontrolling Interest	1,605	(6,628)	11,383	(13,989)
Net Earnings (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Net Earnings (Loss) Attributable to Tennant Company	$ 1,572	$ (6,665)	$ 11,302	$ (13,961)

Separate Financial Informatio_4

Separate Financial Information of Guarantor Subsidiaries Condensed Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net Earnings (Loss) Including Noncontrolling Interest	$ 9,709	$ 3,596	$ 25,775	$ (3,017)
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	(3,110)	9,033	(14,202)	25,073
Pension and retiree medical benefits	12	379	105	541
Cash flow hedge	(28)	(1,732)	(1,367)	(6,311)
Income Taxes:
Foreign currency translation adjustments	280	0	524	0
Pension and retiree medical benefits	(2)	(138)	(156)	(160)
Cash flow hedge	6	646	(814)	2,354
Total Other Comprehensive (Loss) Income, net of tax	(2,842)	8,188	(15,910)	21,497
Total Comprehensive Income Including Noncontrolling Interest	6,867	11,784	9,865	18,480
Comprehensive Income (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Comprehensive Income Attributable to Tennant Company	6,834	11,747	9,784	18,508
Eliminations
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net Earnings (Loss) Including Noncontrolling Interest	(5,516)	3,131	(22,520)	3,305
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	3,436	(9,510)	20,365	(2,023)
Pension and retiree medical benefits	0	(10)	(19)	(151)
Cash flow hedge	0	0	0	0
Income Taxes:
Foreign currency translation adjustments	(280)	0	(524)	0
Pension and retiree medical benefits	0	0	0	15
Cash flow hedge	0	0	0	0
Total Other Comprehensive (Loss) Income, net of tax	3,156	(9,520)	19,822	(2,159)
Total Comprehensive Income Including Noncontrolling Interest	(2,360)	(6,389)	(2,698)	1,146
Comprehensive Income (Loss) Attributable to Noncontrolling Interest	(33)	(37)	(81)	28
Comprehensive Income Attributable to Tennant Company	(2,327)	(6,352)	(2,617)	1,118
Parent
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net Earnings (Loss) Including Noncontrolling Interest	9,709	3,596	25,775	(3,017)
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	(3,110)	9,033	(14,202)	25,073
Pension and retiree medical benefits	12	379	105	541
Cash flow hedge	(28)	(1,732)	(1,367)	(6,311)
Income Taxes:
Foreign currency translation adjustments	280	0	524	0
Pension and retiree medical benefits	(2)	(138)	(156)	(160)
Cash flow hedge	6	646	(814)	2,354
Total Other Comprehensive (Loss) Income, net of tax	(2,842)	8,188	(15,910)	21,497
Total Comprehensive Income Including Noncontrolling Interest	6,867	11,784	9,865	18,480
Comprehensive Income (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Comprehensive Income Attributable to Tennant Company	6,834	11,747	9,784	18,508
Guarantor Subsidiaries
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net Earnings (Loss) Including Noncontrolling Interest	3,911	3,497	11,137	10,684
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	228	289	(262)	693
Pension and retiree medical benefits	0	0	0	0
Cash flow hedge	0	0	0	0
Income Taxes:
Foreign currency translation adjustments	0	0	0	0
Pension and retiree medical benefits	0	0	0	0
Cash flow hedge	0	0	0	0
Total Other Comprehensive (Loss) Income, net of tax	228	289	(262)	693
Total Comprehensive Income Including Noncontrolling Interest	4,139	3,786	10,875	11,377
Comprehensive Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
Comprehensive Income Attributable to Tennant Company	4,139	3,786	10,875	11,377
Non-Guarantor Subsidiaries
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net Earnings (Loss) Including Noncontrolling Interest	1,605	(6,628)	11,383	(13,989)
Other Comprehensive (Loss) Income:
Foreign currency translation adjustments	(3,664)	9,221	(20,103)	1,330
Pension and retiree medical benefits	0	10	19	151
Cash flow hedge	0	0	0	0
Income Taxes:
Foreign currency translation adjustments	280	0	524	0
Pension and retiree medical benefits	0	0	0	(15)
Cash flow hedge	0	0	0	0
Total Other Comprehensive (Loss) Income, net of tax	(3,384)	9,231	(19,560)	1,466
Total Comprehensive Income Including Noncontrolling Interest	(1,779)	2,603	(8,177)	(12,523)
Comprehensive Income (Loss) Attributable to Noncontrolling Interest	33	37	81	(28)
Comprehensive Income Attributable to Tennant Company	$ (1,812)	$ 2,566	$ (8,258)	$ (12,495)

Separate Financial Informatio_5

Separate Financial Information of Guarantor Subsidiaries Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and Cash Equivalents	$ 53,473	$ 58,398
Restricted Cash	534	653
Net Receivables	208,119	209,516
Intercompany Receivables	0	0
Inventories	139,793	127,694
Prepaid Expenses	28,356	19,351
Other Current Assets	8,865	7,503
Total Current Assets	439,140	423,115
Property, Plant and Equipment	381,443	382,768
Accumulated Depreciation	(217,625)	(202,750)
Property, Plant and Equipment, Net	163,818	180,018
Deferred Income Taxes	15,062	11,134
Investment in Affiliates	0	0
Intercompany Loans	0	0
Goodwill	184,619	186,044
Intangible Assets, Net	152,974	172,347
Other Assets	14,953	21,319
Total Assets	970,566	993,977
Current Liabilities:
Current Portion of Long-Term Debt	30,999	30,883
Accounts Payable	90,778	96,082
Intercompany Payables	0	0
Employee Compensation and Benefits	42,157	37,257
Income Taxes Payable	2,972	2,838
Other Current Liabilities	71,842	69,447
Total Current Liabilities	238,748	236,507
Long-Term Liabilities:
Long-Term Debt	316,937	345,956
Intercompany Loans	0	0
Employee-Related Benefits	21,828	23,867
Deferred Income Taxes	48,491	53,225
Other Liabilities	35,479	35,948
Total Long-Term Liabilities	422,735	458,996
Total Liabilities	661,483	695,503
Common Stock	6,796	6,705
Additional Paid-In Capital	26,087	15,089
Retained Earnings	312,539	297,032
Accumulated Other Comprehensive Loss	(38,233)	(22,323)
Total Tennant Company Shareholders' Equity	307,189	296,503
Noncontrolling Interest	1,894	1,971
Total Equity	309,083	298,474
Total Liabilities and Total Equity	970,566	993,977
Eliminations
Current Assets:
Cash and Cash Equivalents	0	0
Restricted Cash	0	0
Net Receivables	0	0
Intercompany Receivables	(174,196)	(187,222)
Inventories	(10,403)	(8,993)
Prepaid Expenses	0	0
Other Current Assets	0	0
Total Current Assets	(184,599)	(196,215)
Property, Plant and Equipment	0	0
Accumulated Depreciation	0	0
Property, Plant and Equipment, Net	0	0
Deferred Income Taxes	0	0
Investment in Affiliates	(434,523)	(424,570)
Intercompany Loans	(307,667)	(309,805)
Goodwill	0	0
Intangible Assets, Net	0	0
Other Assets	0	0
Total Assets	(926,789)	(930,590)
Current Liabilities:
Current Portion of Long-Term Debt	0	0
Accounts Payable	0	0
Intercompany Payables	(174,196)	(187,222)
Employee Compensation and Benefits	0	0
Income Taxes Payable	(298)	0
Other Current Liabilities	298	0
Total Current Liabilities	(174,196)	(187,222)
Long-Term Liabilities:
Long-Term Debt	0	0
Intercompany Loans	(307,667)	(309,805)
Employee-Related Benefits	0	0
Deferred Income Taxes	0	0
Other Liabilities	0	0
Total Long-Term Liabilities	(307,667)	(309,805)
Total Liabilities	(481,863)	(497,027)
Common Stock	(11,131)	(11,131)
Additional Paid-In Capital	(465,767)	(456,943)
Retained Earnings	(25,016)	(2,578)
Accumulated Other Comprehensive Loss	58,882	39,060
Total Tennant Company Shareholders' Equity	(443,032)	(431,592)
Noncontrolling Interest	(1,894)	(1,971)
Total Equity	(444,926)	(433,563)
Total Liabilities and Total Equity	(926,789)	(930,590)
Parent
Current Assets:
Cash and Cash Equivalents	18,082	18,469
Restricted Cash	0	0
Net Receivables	494	683
Intercompany Receivables	31,488	53,444
Inventories	35,858	29,450
Prepaid Expenses	17,673	8,774
Other Current Assets	4,691	4,030
Total Current Assets	108,286	114,850
Property, Plant and Equipment	228,237	225,064
Accumulated Depreciation	(156,476)	(146,320)
Property, Plant and Equipment, Net	71,761	78,744
Deferred Income Taxes	3,127	1,308
Investment in Affiliates	403,903	392,486
Intercompany Loans	303,670	304,822
Goodwill	12,870	12,869
Intangible Assets, Net	4,210	2,105
Other Assets	6,057	10,363
Total Assets	913,884	917,547
Current Liabilities:
Current Portion of Long-Term Debt	29,705	29,413
Accounts Payable	34,447	39,927
Intercompany Payables	143,095	133,778
Employee Compensation and Benefits	10,588	8,311
Income Taxes Payable	469	366
Other Current Liabilities	28,216	20,183
Total Current Liabilities	246,520	231,978
Long-Term Liabilities:
Long-Term Debt	315,277	344,147
Intercompany Loans	3,997	0
Employee-Related Benefits	11,519	11,160
Deferred Income Taxes	0	0
Other Liabilities	27,488	31,788
Total Long-Term Liabilities	358,281	387,095
Total Liabilities	604,801	619,073
Common Stock	6,796	6,705
Additional Paid-In Capital	26,087	15,089
Retained Earnings	312,539	297,032
Accumulated Other Comprehensive Loss	(38,233)	(22,323)
Total Tennant Company Shareholders' Equity	307,189	296,503
Noncontrolling Interest	1,894	1,971
Total Equity	309,083	298,474
Total Liabilities and Total Equity	913,884	917,547
Guarantor Subsidiaries
Current Assets:
Cash and Cash Equivalents	668	507
Restricted Cash	0	0
Net Receivables	93,464	88,629
Intercompany Receivables	142,708	133,778
Inventories	15,118	12,695
Prepaid Expenses	705	1,172
Other Current Assets	340	0
Total Current Assets	253,003	236,781
Property, Plant and Equipment	12,533	12,155
Accumulated Depreciation	(6,459)	(6,333)
Property, Plant and Equipment, Net	6,074	5,822
Deferred Income Taxes	3,078	2,669
Investment in Affiliates	12,133	11,273
Intercompany Loans	0	0
Goodwill	1,726	1,739
Intangible Assets, Net	2,738	2,898
Other Assets	0	0
Total Assets	278,752	261,182
Current Liabilities:
Current Portion of Long-Term Debt	0	0
Accounts Payable	6,727	3,018
Intercompany Payables	0	1,963
Employee Compensation and Benefits	12,873	10,355
Income Taxes Payable	0	0
Other Current Liabilities	14,348	15,760
Total Current Liabilities	33,948	31,096
Long-Term Liabilities:
Long-Term Debt	0	0
Intercompany Loans	128,000	128,000
Employee-Related Benefits	1,916	3,992
Deferred Income Taxes	0	0
Other Liabilities	3,336	2,483
Total Long-Term Liabilities	133,252	134,475
Total Liabilities	167,200	165,571
Common Stock	0	0
Additional Paid-In Capital	77,551	72,483
Retained Earnings	34,932	23,797
Accumulated Other Comprehensive Loss	(931)	(669)
Total Tennant Company Shareholders' Equity	111,552	95,611
Noncontrolling Interest	0	0
Total Equity	111,552	95,611
Total Liabilities and Total Equity	278,752	261,182
Non-Guarantor Subsidiaries
Current Assets:
Cash and Cash Equivalents	34,723	39,422
Restricted Cash	534	653
Net Receivables	114,161	120,204
Intercompany Receivables	0	0
Inventories	99,220	94,542
Prepaid Expenses	9,978	9,405
Other Current Assets	3,834	3,473
Total Current Assets	262,450	267,699
Property, Plant and Equipment	140,673	145,549
Accumulated Depreciation	(54,690)	(50,097)
Property, Plant and Equipment, Net	85,983	95,452
Deferred Income Taxes	8,857	7,157
Investment in Affiliates	18,487	20,811
Intercompany Loans	3,997	4,983
Goodwill	170,023	171,436
Intangible Assets, Net	146,026	167,344
Other Assets	8,896	10,956
Total Assets	704,719	745,838
Current Liabilities:
Current Portion of Long-Term Debt	1,294	1,470
Accounts Payable	49,604	53,137
Intercompany Payables	31,101	51,481
Employee Compensation and Benefits	18,696	18,591
Income Taxes Payable	2,801	2,472
Other Current Liabilities	28,980	33,504
Total Current Liabilities	132,476	160,655
Long-Term Liabilities:
Long-Term Debt	1,660	1,809
Intercompany Loans	175,670	181,805
Employee-Related Benefits	8,393	8,715
Deferred Income Taxes	48,491	53,225
Other Liabilities	4,655	1,677
Total Long-Term Liabilities	238,869	247,231
Total Liabilities	371,345	407,886
Common Stock	11,131	11,131
Additional Paid-In Capital	388,216	384,460
Retained Earnings	(9,916)	(21,219)
Accumulated Other Comprehensive Loss	(57,951)	(38,391)
Total Tennant Company Shareholders' Equity	331,480	335,981
Noncontrolling Interest	1,894	1,971
Total Equity	333,374	337,952
Total Liabilities and Total Equity	$ 704,719	$ 745,838

Separate Financial Informatio_6

Separate Financial Information of Guarantor Subsidiaries Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities	$ 43,469	$ 32,123
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(12,768)	(16,239)
Proceeds from Disposals of Property, Plant and Equipment	108	2,456
Proceeds from Principal Payments Received on Long-Term Note Receivable	828	500
Proceeds from Sale of Business	4,000	0
Issuance of Long-Term Note Receivable	0	(1,500)
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired	0	(353,535)
Purchase of Intangible Assets	(2,607)	(2,500)
Change in Investments in Subsidiaries	0	0
Loan Payments from Subsidiaries	0
Loan Payments from Parent	0
Loan (Payments) Borrowings from Subsidiaries		0
Net Cash Used in Investing Activities	(10,439)	(370,818)
FINANCING ACTIVITIES
Proceeds from Short-Term Debt	0	300,000
Repayments of Short-Term Debt	0	(300,000)
Loan Borrowings (Payments) from Parent		0
Change in Subsidiary Equity	0	0
Proceeds from Issuance of Long-term Debt	0	440,000
Payments of Long-term Debt	(30,216)	(81,262)
Payments of Debt Issuance Costs	0	(16,465)
Change in Capital Lease Obligations	7	0
Loan Payments to Parent	0
Loan Payments to Subsidiaries	0
Proceeds from Issuance of Common Stock	5,735	4,728
Dividends Paid	(11,356)	(11,204)
Net Cash (Used in) Provided by Financing Activities	(35,830)	335,797
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	(2,244)	1,587
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(5,044)	(1,311)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	59,051	58,550
Cash, Cash Equivalents and Restricted Cash at End of Period	54,007	57,239
Eliminations
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities	0	0
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	0	0
Proceeds from Disposals of Property, Plant and Equipment	0	0
Proceeds from Principal Payments Received on Long-Term Note Receivable	0	0
Proceeds from Sale of Business	0
Issuance of Long-Term Note Receivable		0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		0
Purchase of Intangible Assets	0	0
Change in Investments in Subsidiaries	1,817	193,639
Loan Payments from Subsidiaries	(1,218)
Loan Payments from Parent	(986)
Loan (Payments) Borrowings from Subsidiaries		159,780
Net Cash Used in Investing Activities	(387)	353,419
FINANCING ACTIVITIES
Proceeds from Short-Term Debt		0
Repayments of Short-Term Debt		0
Loan Borrowings (Payments) from Parent		(159,780)
Change in Subsidiary Equity	(1,817)	(193,639)
Proceeds from Issuance of Long-term Debt		0
Payments of Long-term Debt	0	0
Payments of Debt Issuance Costs		0
Change in Capital Lease Obligations	0
Loan Payments to Parent	(1,218)
Loan Payments to Subsidiaries	986
Proceeds from Issuance of Common Stock	0	0
Dividends Paid	0	0
Net Cash (Used in) Provided by Financing Activities	387	(353,419)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	0	0
Net Decrease in Cash, Cash Equivalents and Restricted Cash	0	0
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	0	0
Cash, Cash Equivalents and Restricted Cash at End of Period	0	0
Parent
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities	43,661	(555)
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(4,505)	(7,400)
Proceeds from Disposals of Property, Plant and Equipment	20	17
Proceeds from Principal Payments Received on Long-Term Note Receivable	0	0
Proceeds from Sale of Business	0
Issuance of Long-Term Note Receivable		0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		(304)
Purchase of Intangible Assets	(2,500)	(2,500)
Change in Investments in Subsidiaries	(1,817)	(193,639)
Loan Payments from Subsidiaries	1,218
Loan Payments from Parent	0
Loan (Payments) Borrowings from Subsidiaries		(159,780)
Net Cash Used in Investing Activities	(7,584)	(363,606)
FINANCING ACTIVITIES
Proceeds from Short-Term Debt		300,000
Repayments of Short-Term Debt		(300,000)
Loan Borrowings (Payments) from Parent		0
Change in Subsidiary Equity	0	0
Proceeds from Issuance of Long-term Debt		440,000
Payments of Long-term Debt	(30,000)	(81,143)
Payments of Debt Issuance Costs		(16,465)
Change in Capital Lease Obligations	0
Loan Payments to Parent	0
Loan Payments to Subsidiaries	(986)
Proceeds from Issuance of Common Stock	5,735	4,728
Dividends Paid	(11,356)	(11,204)
Net Cash (Used in) Provided by Financing Activities	(36,607)	335,916
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	143	(68)
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(387)	(28,313)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	18,469	38,484
Cash, Cash Equivalents and Restricted Cash at End of Period	18,082	10,171
Guarantor Subsidiaries
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities	219	798
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(58)	0
Proceeds from Disposals of Property, Plant and Equipment	0	0
Proceeds from Principal Payments Received on Long-Term Note Receivable	0	0
Proceeds from Sale of Business	0
Issuance of Long-Term Note Receivable		0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		0
Purchase of Intangible Assets	0	0
Change in Investments in Subsidiaries	0	0
Loan Payments from Subsidiaries	0
Loan Payments from Parent	0
Loan (Payments) Borrowings from Subsidiaries		0
Net Cash Used in Investing Activities	(58)	0
FINANCING ACTIVITIES
Proceeds from Short-Term Debt		0
Repayments of Short-Term Debt		0
Loan Borrowings (Payments) from Parent		0
Change in Subsidiary Equity	0	0
Proceeds from Issuance of Long-term Debt		0
Payments of Long-term Debt	0	0
Payments of Debt Issuance Costs		0
Change in Capital Lease Obligations	0
Loan Payments to Parent	0
Loan Payments to Subsidiaries	0
Proceeds from Issuance of Common Stock	0	0
Dividends Paid	0	0
Net Cash (Used in) Provided by Financing Activities	0	0
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	0	0
Net Decrease in Cash, Cash Equivalents and Restricted Cash	161	798
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	507	226
Cash, Cash Equivalents and Restricted Cash at End of Period	668	1,024
Non-Guarantor Subsidiaries
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities	(411)	31,880
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(8,205)	(8,839)
Proceeds from Disposals of Property, Plant and Equipment	88	2,439
Proceeds from Principal Payments Received on Long-Term Note Receivable	828	500
Proceeds from Sale of Business	4,000
Issuance of Long-Term Note Receivable		(1,500)
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		(353,231)
Purchase of Intangible Assets	(107)	0
Change in Investments in Subsidiaries	0	0
Loan Payments from Subsidiaries	0
Loan Payments from Parent	986
Loan (Payments) Borrowings from Subsidiaries		0
Net Cash Used in Investing Activities	(2,410)	(360,631)
FINANCING ACTIVITIES
Proceeds from Short-Term Debt		0
Repayments of Short-Term Debt		0
Loan Borrowings (Payments) from Parent		159,780
Change in Subsidiary Equity	1,817	193,639
Proceeds from Issuance of Long-term Debt		0
Payments of Long-term Debt	(216)	(119)
Payments of Debt Issuance Costs		0
Change in Capital Lease Obligations	7
Loan Payments to Parent	1,218
Loan Payments to Subsidiaries	0
Proceeds from Issuance of Common Stock	0	0
Dividends Paid	0	0
Net Cash (Used in) Provided by Financing Activities	390	353,300
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	(2,387)	1,655
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(4,818)	26,204
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	40,075	19,840
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 35,257	$ 46,044

Separate Financial Informatio_7

Separate Financial Information of Guarantor Subsidiaries Narrative (Details) - Bonds $ in Thousands	Apr. 18, 2017USD ($)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Debt Instrument, Face Amount	$ 300,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%