Tennant (TNC) 10-Q 9 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2017	Jul. 31, 2017
Entity Information
Entity Registrant Name	Tennant Company
Entity Central Index Key	97,134
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		17,824,192
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Sales	$ 270,791	$ 216,828	$ 461,850	$ 396,692
Cost of Sales	166,237	121,539	277,560	223,901
Gross Profit	104,554	95,289	184,290	172,791
Operating Expense:
Research and Development Expense	7,886	8,390	16,332	16,294
Selling and Administrative Expense	87,513	64,253	161,416	126,692
Loss on Sale of Business	0	87	0	149
Total Operating Expense	95,399	72,730	177,748	143,135
Profit from Operations	9,155	22,559	6,542	29,656
Other Income (Expense):
Interest Income	793	40	877	81
Interest Expense	(11,833)	(288)	(12,627)	(590)
Net Foreign Currency Transaction (Losses) Gains	(336)	597	(1,533)	324
Other Expense, Net	(197)	(314)	(218)	(350)
Total Other (Expense) Income, Net	(11,573)	35	(13,501)	(535)
(Loss) Profit Before Income Taxes	(2,418)	22,594	(6,959)	29,121
Income Tax Expense (Benefit)	238	7,266	(346)	9,354
Net (Loss) Earnings Including Noncontrolling Interest	(2,656)	15,328	(6,613)	19,767
Net Loss Attributable to Noncontrolling Interest	(65)	0	(65)	0
Net (Loss) Earnings Attributable to Tennant Company	$ (2,591)	$ 15,328	$ (6,548)	$ 19,767
Net (Loss) Earnings Attributable to Tennant Company per Share:
Basic	$ (0.15)	$ 0.88	$ (0.37)	$ 1.13
Diluted	$ (0.15)	$ 0.85	$ (0.37)	$ 1.10
Weighted Average Shares Outstanding:
Basic	17,693,102	17,508,022	17,645,090	17,526,107
Diluted	17,693,102	17,933,243	17,645,090	17,954,167
Cash Dividend Declared per Common Share	$ 0.21	$ 0.20	$ 0.42	$ 0.40

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net (Loss) Earnings Including Noncontrolling Interest	$ (2,656)	$ 15,328	$ (6,613)	$ 19,767
Other Comprehensive Income:
Foreign currency translation adjustments	13,640	403	16,040	3,999
Pension and retiree medical benefits	152	19	162	38
Cash flow hedge	(4,506)	18	(4,579)	(429)
Income Taxes:
Foreign currency translation adjustments	0	(1)	0	5
Pension and retiree medical benefits	(4)	(7)	(22)	(14)
Cash flow hedge	1,681	(7)	1,708	160
Total Other Comprehensive Income, Net of Tax	10,963	425	13,309	3,759
Total Comprehensive Income Including Noncontrolling Interest	8,307	15,753	6,696	23,526
Comprehensive Loss Attributable to Noncontrolling Interest	(65)	0	(65)	0
Comprehensive Income Attributable to Tennant Company	$ 8,372	$ 15,753	$ 6,761	$ 23,526

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and Cash Equivalents	$ 53,305	$ 58,033
Restricted Cash	1,243	517
Accounts Receivable, less Allowances of $2,992 and $3,108, respectively	199,861	149,134
Inventories	141,579	78,622
Prepaid Expenses	25,198	9,204
Other Current Assets	5,461	2,412
Total Current Assets	426,647	297,922
Property, Plant and Equipment	373,254	298,500
Accumulated Depreciation	(195,248)	(186,403)
Property, Plant and Equipment, Net	178,006	112,097
Deferred Income Taxes	20,157	13,439
Goodwill	183,250	21,065
Intangible Assets, Net	166,198	6,460
Other Assets	22,953	19,054
Total Assets	997,211	470,037
Current Liabilities:
Short-Term Borrowings and Current Portion of Long-Term Debt	5,307	3,459
Accounts Payable	88,572	47,408
Employee Compensation and Benefits	35,789	35,997
Income Taxes Payable	6,753	2,348
Other Current Liabilities	58,189	43,617
Total Current Liabilities	194,610	132,829
Long-Term Liabilities:
Long-Term Debt	405,716	32,735
Employee-Related Benefits	25,581	21,134
Deferred Income Taxes	59,002	171
Other Liabilities	24,937	4,625
Total Long-Term Liabilities	515,236	58,665
Total Liabilities	709,846	191,494
Commitments and Contingencies (Note 14)
Equity:
Preferred Stock, $0.02 par value; 1,000,000 shares authorized; no shares issued or outstanding	0	0
Common Stock, $0.375 par value; 60,000,000 shares authorized; 17,823,292 and 17,688,350 shares issued and outstanding, respectively	6,684	6,633
Additional Paid-In Capital	9,915	3,653
Retained Earnings	304,170	318,180
Accumulated Other Comprehensive Loss	(36,614)	(49,923)
Total Tennant Company Shareholders' Equity	284,155	278,543
Noncontrolling Interest	3,210	0
Total Equity	287,365	278,543
Total Liabilities and Total Equity	$ 997,211	$ 470,037

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Allowance For Doubtful Receivables And Sales Returns	$ 2,992	$ 3,108
Equity:
Preferred Stock, par value per share	$ 0.02	$ 0.02
Preferred Stock, shares authorized	1,000,000	1,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value per share	$ 0.375	$ 0.375
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	17,823,292	17,688,350
Common Stock, shares outstanding	17,823,292	17,688,350

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
OPERATING ACTIVITIES
Net (Loss) Earnings Including Noncontrolling Interest	$ (6,613)	$ 19,767
Adjustments to reconcile Net (Loss) Earnings to Net Cash (Used in) Provided by Operating Activities:
Depreciation	11,043	8,655
Amortization of Intangible Assets	3,780	224
Amortization of Debt Issuance Costs	466	77
Debt Issuance Cost Charges Related to Financing	6,200	0
Fair Value Step-Up Adjustment to Acquired Inventory	6,199	0
Deferred Income Taxes	(6,032)	(1,633)
Share-Based Compensation Expense	3,622	4,426
Allowance for Doubtful Accounts and Returns	697	606
Loss on Sale of Business	0	149
Other, Net	64	(63)
Changes in Operating Assets and Liabilities:
Receivables	(6,016)	(12,314)
Inventories	(9,854)	(3,941)
Accounts Payable	6,190	(389)
Employee Compensation and Benefits	(8,262)	(5,788)
Other Current Liabilities	5,252	(3,936)
Income Taxes	(1,617)	6,743
Other Assets and Liabilities	(7,614)	(142)
Net Cash (Used in) Provided by Operating Activities	(2,495)	12,441
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(9,145)	(14,769)
Proceeds from Disposals of Property, Plant and Equipment	2,428	427
Issuance of Long-Term Note Receivable	(1,500)	0
Acquisition of Businesses, Net of Cash Acquired	(354,073)	0
Purchase of Intangible Assets	(2,500)	0
Proceeds from Sale of Business	0	285
(Increase) Decrease in Restricted Cash	(118)	120
Net Cash Used in Investing Activities	(364,908)	(13,937)
FINANCING ACTIVITIES
Proceeds from Short-term Debt	300,000	0
Repayments of Short-term Debt	(300,000)	0
Proceeds from Issuance of Long-term Debt	440,000	0
Payments of Long-Term Debt	(58,471)	(3,444)
Payments of Debt Issuance Costs	(16,039)	0
Purchases of Common Stock	0	(12,762)
Proceeds from Issuance of Common Stock	3,843	1,196
Excess Tax Benefit on Stock Plans	0	246
Dividends Paid	(7,463)	(7,058)
Net Cash Provided by (Used in) Financing Activities	361,870	(21,822)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	805	(37)
Net Decrease in Cash and Cash Equivalents	(4,728)	(23,355)
Cash and Cash Equivalents at Beginning of Period	58,033	51,300
Cash and Cash Equivalents at End of Period	53,305	27,945
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Income Taxes	4,851	3,174
Cash Paid for Interest	2,463	505
Supplemental Non-cash Investing and Financing Activities:
Long-Term Note Receivable from Sale of Business	0	5,489
Capital Expenditures in Accounts Payable	1,440	1,538
Debt Issuance Costs Incurred but not yet Paid	$ 417	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	6 Months Ended
	Jun. 30, 2017
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, 2016 . The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. Equity Method Investment – Investments in which we have the ability to exercise significant influence, but do not control, are accounted for under the equity method of accounting and are included in Other Assets on the Condensed Consolidated Balance Sheets. Under this method of accounting, our share of the net earnings or losses of the investee are presented as a component of Other Expense, Net on the Condensed Consolidated Statements of Operations. The details regarding our equity method investment in i-team North America B.V., a joint venture that operates as the distributor of the i-mop in North America, are further described in Note 3. New Accounting Pronouncements – In accordance with Accounting Standards Update ("ASU") No. 2016-09, C ompensation–Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , all excess tax benefits and tax deficiencies are recorded as a component of the provision for income taxes in the reporting period in which they occur. Additionally, we present excess tax benefits along with other income tax cash flows on the Condensed Consolidated Statements of Cash Flows as an operating activity rather than, as previously required, a financing activity. For further details regarding the implementation of this ASU and the impact on our financial statements, see 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, 2016 . 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)	6 Months Ended
	Jun. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Newly Adopted Accounting Pronouncements	2. Newly Adopted Accounting Pronouncements On March 30, 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-09, C ompensation–Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which amends Accounting Standards Codification ("ASC") Topic 718, Compensation – Stock Compensation. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the Condensed Consolidated Statements of Cash Flows. Under the new standard, all excess tax benefits and tax deficiencies are recorded as a component of the provision for income taxes in the reporting period in which they occur. Additionally, ASU 2016-09 requires that the Company present excess tax benefits along with other income tax cash flows on the Condensed Consolidated Statements of Cash Flows as an operating activity rather than, as previously required, a financing activity. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016. We have adopted ASU 2016-09 effective January 1, 2017 on a prospective basis where permitted by the new standard. As a result of this adoption: • For the three and six months ended June 30, 2017 , we recognized discrete tax benefits of $742 and $1,144 , respectively, in the Income Tax Expense (Benefit) line item of our Condensed Consolidated Statements of Operations related to excess tax benefits upon vesting or settlement in that period. • We elected to adopt the cash flow presentation of the excess tax benefits prospectively where the tax benefits are classified along with other income tax cash flows as operating cash flows in 2017. Our prior year's excess tax benefits are recognized as financing cash flows. However, other income tax cash flows are classified as operating cash flows. • We have elected to account for forfeitures as they occur, rather than electing to estimate the number of share-based awards expected to vest to determine the amount of compensation cost to be recognized in each period. The difference of such change is immaterial. • We excluded the excess tax benefits from the assumed proceeds available to repurchase shares in the computation of our diluted earnings per share for the three and six months ended June 30, 2017 .

Investment in Joint Venture (No

Investment in Joint Venture (Notes)	6 Months Ended
	Jun. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments and Joint Ventures Disclosure [Text Block]	3. Investment in Joint Venture On February 13, 2017, the Company, through a Dutch subsidiary, and i-team Global, a Future Cleaning Technologies, B.V. company headquartered in The Netherlands, announced the January 1, 2017 formation of i-team North America B.V., a joint venture that will operate as the distributor of the i-mop in North America. The Company began selling and servicing the i-mop in the second quarter of 2017 . The Company owns a 50% ownership interest in the joint venture and is accounted for under the equity method of accounting, with our proportionate share of income or loss presented as a component of Other Expense, Net on the Condensed Consolidated Statements of Operations. As of June 30, 2017 , the carrying value of the Company's investment in the joint venture was $57 . In March 2017, the Company issued a $1,500 loan to the joint venture and, as a result, recorded a long-term note receivable in Other Assets on the Condensed Consolidated Balance Sheets.

Management Action

Management Action	6 Months Ended
	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Management Actions	4. Management Action 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. We believe the anticipated savings will offset the pre-tax charge in approximately one year from the date of the action. We do not expect additional costs will be incurred related to this restructuring action. A reconciliation to the ending liability balance of severance and related costs as of June 30, 2017 is as follows: Severance and Related Costs Q1 2017 restructuring action $ 7,057 Cash payments (5,297 ) Foreign currency adjustments 110 June 30, 2017 balance $ 1,870

Acquisitions (Notes)

Acquisitions (Notes)	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisitions	5. Acquisitions IP Cleaning S.p.A. On April 6, 2017 , we acquired 100 percent of 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 $10,652 . 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 will allow 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 9. The following table summarizes the preliminary fair value measurement of the assets acquired and liabilities assumed as of the date of acquisition: ASSETS Restricted Cash 538 Receivables 40,067 Inventories 54,222 Other Current Assets 4,362 Assets Held for Sale 2,247 Property, Plant and Equipment 62,845 Intangible Assets Subject to Amortization: Trade Name 29,963 Customer Lists 115,571 Noncompete Agreements 3,210 Other Assets 4,168 Total Identifiable Assets Acquired 317,193 LIABILITIES Accounts Payable 31,529 Accrued Expenses 15,756 Deferred Income Taxes 58,573 Other Liabilities 6,967 Total Identifiable Liabilities Assumed 112,825 Net Identifiable Assets Acquired 204,368 Noncontrolling Interest (3,312 ) Goodwill 152,713 Total Estimated Purchase Price, net of Cash Acquired $ 353,769 The acquired assets, liabilities and operating results have been included in our Condensed Consolidated Financial Statements from the date of acquisition. During the three and six months ended June 30, 2017 , we included Net Sales of $59,074 and a net loss of $5,187 from IPC Group in our Condensed Consolidated Statements of Operations. The net loss includes a $4,470 fair value adjustment, net of tax, to the acquired inventory of IPC Group. In addition, costs of $4,684 , net of tax, associated with the acquisition of the IPC Group were expensed as incurred in the Condensed Consolidated Statements of Operations. The preliminary gross amount of the accounts receivable acquired is $43,785 , of which $3,718 is expected to be uncollectible. The fair value measurement was preliminary at June 30, 2017 . During the measurement period, the Company expects to record adjustments relating to the finalization of Intangible Assets, Inventories, Restricted Cash and Property, Plant and Equipment valuations, and various income tax matters, amongst others. We expect the fair value measurement process to be completed as soon as possible, but no later than one year from the acquisition date. Goodwill was calculated as the difference between the acquisition date fair value of the total purchase price consideration and the fair value of the net identifiable assets acquired, and represents the future economic benefits that we expect to achieve as a result of the acquisition. This resulted in an estimated purchase price in excess of the fair value of identifiable net assets acquired. The estimated purchase price also included the fair value of other assets that were not identifiable and not separately recognizable under accounting rules (i.e. assembled workforce) or these assets were of immaterial value. In addition, there is a going concern element that represents our ability to earn a higher rate of return on the group of assets than would be expected on the separate assets as determined during the valuation process. Based on preliminary fair value measurement of the assets acquired and liabilities assumed, we allocated $152,713 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. The assignment of Goodwill to reporting units is not complete, pending finalization of the valuation measurements. The fair value of acquired identifiable intangible assets was primarily determined using discounted expected cash flows. The fair value of acquired identifiable tangible assets was primarily determined using the cost or market approach. The valuations were based on the information that was 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 the assets acquired and liabilities assumed were based on valuations involving significant unobservable inputs, or Level 3 in the fair value hierarchy. The preliminary fair value of the acquired intangible assets is $148,744 . The expected lives of the acquired amortizable intangible assets are approximately 15 years for Customer Lists, 11 years for Trade Names and two years for Non-Compete Agreements and all are being amortized on a straight-line basis, pending finalization of fair value. The following unaudited pro forma financial information presents the combined results of operations of Tennant Company as if the acquisition of IPC Group had occurred as of January 1, 2017 and 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 each year, nor does it attempt to project the future results of operations of the combined company. Pro Forma Financial Information (Unaudited) Three Months Ended Six Months Ended (In thousands, except per share data) June 30 June 30 2017 2016 2017 2016 Net Sales Pro forma $ 270,791 $ 269,689 $ 517,163 $ 497,896 As reported 270,791 216,828 461,850 396,692 Net Earnings (Loss) Attributable to Tennant Company Pro forma $ 10,308 $ 13,577 $ 10,260 $ 15,889 As reported (2,591 ) 15,328 (6,548 ) 19,767 Net Earnings (Loss) Attributable to Tennant Company per Share Pro forma $ 0.58 $ 0.76 $ 0.58 $ 0.88 As reported (0.15 ) 0.85 (0.37 ) 1.10 The unaudited pro forma financial information is based on certain assumptions which we believe are reasonable, directly attributable to the transaction, factually supportable and do not reflect any cost savings, operating synergies or revenue enhancements that we may achieve, nor the costs necessary to achieve those cost savings, operating synergies, revenue enhancements or integration efforts. The unaudited pro forma financial information above gives effect to the following: • Incremental amortization and depreciation expense related to the estimated fair value of the identifiable intangible assets and property, plant and equipment from the preliminary purchase price allocation . • Exclusion of the purchase accounting impact of the inventory step up reported in cost of sales for the sale of acquired inventory of $6,199 . • Incremental interest expense related to additional debt used to finance the acquisition. • Exclusion of non-recurring acquisition-related transaction and financing costs. • Pro forma adjustments tax affected based on the jurisdiction where the costs were incurred. Other Acquisitions On July 28, 2016 , pursuant to an asset purchase agreement and real estate purchase agreement with Crawford Laboratories, Inc. and affiliates thereof ("Sellers") , we acquired selected assets and liabilities of the Seller's commercial floor coatings business, including the Florock ® Polymer Flooring brand ("Florock"). Florock manufactures commercial floor coatings systems in Chicago, IL. The purchase price was $11,843 , including working capital and other adjustments, and is comprised of $10,965 paid at closing, with the remaining $878 paid in two installments. We paid the first installment of $575 on October 14, 2016. The remaining amount was paid during the 2017 first quarter. On September 1, 2016 , we acquired selected assets and liabilities of Dofesa Barrido Mecanizado ("Dofesa") which was our largest distributor in Mexico over many decades. The operations are based in Aguascalientes, Mexico, and their addition allows us to expand our sales and service network in an important market. The purchase price was $5,000 less assumed liabilities of $3,448 , subject to customary working capital adjustments. The net purchase price of $1,552 is comprised of $1,202 paid at closing, and a value added tax of $191 , with the remaining $350 subject to working capital adjustments. The working capital adjustment is not yet finalized, but we do not expect to pay additional cash beyond the cash already paid. The acquisitions have been accounted for as business combinations and the results of their operations have been included in the Condensed Consolidated Financial Statements since their respective dates of acquisition. The impact of the incremental revenue and earnings recorded as a result of the acquisitions are not material to our Condensed Consolidated Financial Statements. The purchase price allocation for the Florock acquisition is complete. The purchase price allocation for the Dofesa acquisition is complete except for a preliminary valuation of Intangible Assets and finalization of the working capital adjustment. We expect our valuation will be complete in the third quarter of 2017. The preliminary components of the purchase price of the business combinations described above have been allocated as follows: Current Assets $ 5,949 Property, Plant and Equipment, net 4,112 Identified Intangible Assets 6,055 Goodwill 1,739 Other Assets 7 Total Assets Acquired 17,862 Current Liabilities 4,764 Other Liabilities 53 Total Liabilities Assumed 4,817 Net Assets Acquired $ 13,045

Divestiture

Divestiture	6 Months Ended
	Jun. 30, 2017
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Divestiture	6. Divestiture On January 19, 2016 , we signed a Business Purchase Agreement (“BPA”) with Green Machines International GmbH and Green Machine Sweepers UK Limited ("the Buyers"), subsidiaries of M&F Management and Financing GmbH, which is also the parent company of the master distributor of our products in Central Eastern Europe, Middle East and Africa, TCS EMEA GmbH, for the sale of our Green Machines outdoor city cleaning line. The sale closed on January 31, 2016 . Including working capital adjustments, the aggregate consideration for the Green Machines business was $5,774 . For additional information regarding the sale of our Green Machines outdoor city cleaning line, the distributor agreement with the Buyers and the subsequent amendments to the distributor agreement and BPA, refer to Note 4 of our Consolidated Financial Statements as disclosed in our 2016 annual report on Form 10-K for the year ended December 31, 2016 . In the first six months of 2016 , as a result of this divestiture, we recorded a pre-tax loss of $149 in our Profit from Operations in the Condensed Consolidated Statements of Operations. The impact of the recorded loss and the sale of Green Machines was not material to our earnings as Green Machines only accounted for approximately two percent of our total sales. We have identified Green Machines International GmbH as a variable interest entity (“VIE”) and have performed a qualitative assessment to determine if Tennant is the primary beneficiary of the VIE. We have determined that we are not the primary beneficiary of the VIE and consolidation of the VIE is not considered necessary.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories	7. Inventories Inventories are valued at the lower of cost or market. Inventories at June 30, 2017 and December 31, 2016 consisted of the following: June 30, December 31, Inventories carried at LIFO: Finished goods $ 45,562 $ 39,142 Raw materials, production parts and work-in-process 25,107 23,980 LIFO reserve (28,190 ) (28,190 ) Total LIFO inventories 42,479 34,932 Inventories carried at FIFO: Finished goods 57,771 31,044 Raw materials, production parts and work-in-process 41,329 12,646 Total FIFO inventories 99,100 43,690 Total inventories $ 141,579 $ 78,622 The LIFO reserve approximates the difference between LIFO carrying cost and FIFO.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	8. Goodwill and Intangible Assets The changes in the carrying value of Goodwill for the six months ended June 30, 2017 were as follows: Goodwill Accumulated Impairment Losses Total Balance as of December 31, 2016 $ 58,397 $ (37,332 ) $ 21,065 Additions 152,713 — 152,713 Purchase accounting adjustments (2,048 ) — (2,048 ) Foreign currency fluctuations 13,736 (2,216 ) 11,520 Balance as of June 30, 2017 $ 222,798 $ (39,548 ) $ 183,250 The balances of acquired Intangible Assets, excluding Goodwill, as of June 30, 2017 and December 31, 2016 , were as follows: Customer Lists Trade Name Technology Noncompete Agreement Total Balance as of June 30, 2017 Original cost $ 136,503 $ 33,954 $ 5,247 $ 3,424 $ 179,128 Accumulated amortization (8,697 ) (823 ) (2,982 ) (428 ) (12,930 ) Carrying value $ 127,806 $ 33,131 $ 2,265 $ 2,996 $ 166,198 Weighted average original life (in years) 15 11 14 2 Balance as of December 31, 2016 Original cost $ 8,016 $ 2,000 $ 5,136 $ — $ 15,152 Accumulated amortization (5,948 ) — (2,744 ) — (8,692 ) Carrying value $ 2,068 $ 2,000 $ 2,392 $ — $ 6,460 Weighted average original life (in years) 15 15 13 0 The additions to Goodwill during the first six months of 2017 were based on the preliminary purchase price allocation of our acquisition of the IPC Group and adjustments to the preliminary purchase price allocation related to our acquisition of the Florock brand and the assets of Dofesa Barrido Mecanizado, as described further in Note 5. As part of our acquisition of the IPC Group, we acquired a Trade Name, Customer Lists and a Noncompete Agreement for a preliminary fair value measurement of $148,744 . Further details regarding the preliminary purchase price allocation of our acquisition of the IPC Group described is described further in Note 5. As part of the formation of the i-team North America B.V. joint venture, we purchased the distribution rights to sell the i-mop in North America for $2,500 . The distribution rights were recorded in Intangible Assets, Net as a customer list on the Condensed Consolidated Balance Sheets as of June 30, 2017 . The i-mop distribution rights have a useful life of five years . Further details regarding the joint venture are discussed in Note 3. Amortization expense on Intangible Assets for the three and six months ended June 30, 2017 was $3,536 and $3,780 , respectively. Amortization expense on Intangible Assets for the three and six months ended June 30, 2016 was $112 and $224 , 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 2017 $ 7,043 2018 14,085 2019 12,801 2020 12,374 2021 12,374 Thereafter 107,521 Total $ 166,198

Debt

Debt	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Debt	9. Debt JPMorgan Credit Facility In order to finance the acquisition of the IPC Group, 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 on April 4, 2017 . The 2017 Credit Agreement provides the Company and certain of our foreign subsidiaries access to a senior secured credit facility until April 4, 2022 , consisting of a multi-tranche term loan facility in an amount up to $400,000 and a revolving facility in an amount up to $200,000 with an option to expand the revolving facility by $150,000 , with the consent of the lenders willing to provide additional borrowings in the form of increases to their revolving facility commitment or funding of incremental term loans. Borrowings may be denominated in U.S. dollars or certain other currencies. The fee for committed funds under the revolving facility of the 2017 Credit Agreement ranges from an annual rate of 0.175% to 0.35% , depending on the Company’s leverage ratio. Borrowings denominated in U.S. dollars under the 2017 Credit Agreement bear interest at a rate per annum equal to (a) the greatest of (i) the prime rate, (ii) the federal funds rate plus 0.50% and (iii) the adjusted LIBOR rate for a one month period, but in any case, not less than 0% , plus, in any such case, 1.00% , plus an additional spread of 0.075% to 0.90% for revolving loans and 0.25% to 1.25% for term loans, depending on the Company’s leverage ratio, or (b) the LIBOR Rate, as adjusted for statutory reserve requirements for eurocurrency liabilities, but in any case, not less than 0% , plus an additional spread of 1.075% to 1.90% for revolving loans and 1.25% to 2.25% for term loans, depending on the Company’s leverage ratio. Upon entry into the 2017 Credit Agreement, the Company repaid $45,000 in outstanding borrowings under our Amended and Restated Credit Agreement, as described in Note 9 of our annual report on Form 10-K for the year ended December 31, 2016 , and terminated the Amended and Restated Credit Agreement. 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 Credit Agreement also contains financial covenants, including the ratio of consolidated total indebtedness to consolidated earnings before income, taxes, depreciation and amortization ("EBITDA"), as well as the ratio of consolidated EBITDA to consolidated interest expense. These financial covenants may restrict our ability to pay dividends and purchase outstanding shares of our common stock. At June 30, 2017 , we were in compliance with these financial covenants. The full terms and conditions of the senior secured credit facility, including our financial covenants, are set forth in the 2017 Credit Agreement. A copy of the 2017 Credit Agreement was filed as Exhibit 10.1 to the Company's Current Report on Form 8-K filed April 5, 2017 and is incorporated by reference herein. Issuance of 5.625% Senior Notes due 2025 On April 18, 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 therein), and Wells Fargo Bank, National Association, a national banking association, as trustee. The Notes are guaranteed by Tennant Coatings, Inc. and Tennant Sales and Service Company (collectively, the “Guarantors”), which are wholly owned subsidiaries of the Company. The Notes will mature on May 1, 2025 . Interest on the Notes will accrue at the rate of 5.625% per annum and will be payable semiannually in cash on each May 1 and November 1, commencing on November 1, 2017. The Notes and the guarantees will constitute senior unsecured obligations of the Company and the Guarantors, respectively. The Notes and the guarantees, respectively, will be: (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. We used the net proceeds from this offering to refinance a $300,000 term loan under our 2017 Credit Agreement that we borrowed as part of the financing for the acquisition of the IPC Group and to pay related fees and expenses. The full terms and conditions of the Indenture are set forth in Exhibit 4.1 to the Company's Current Report on Form 8-K filed April 24, 2017 and is incorporated by reference herein. Registration Rights Agreement In connection with the issuance and sale of the 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 Notes for new registered notes (the “Exchange Notes”), with terms substantially identical in all material respects with the 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 Notes. If the Company fails to satisfy its obligations under the Registration Rights Agreement within 360 days , it will be required to pay additional interest to the holders of the Notes under certain circumstances. The Registration Rights Agreement is incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed April 24, 2017. Debt outstanding at June 30, 2017 is summarized as follows: June 30, December 31, Long-Term Debt: Senior Unsecured Notes $ 300,000 $ — Credit Facility Borrowings 117,750 36,143 Capital Lease Obligations 688 51 Total Long-Term Debt 418,438 36,194 Less: Unamortized Debt Issuance Costs (7,415 ) — Less: Current Maturities of Credit Facility Borrowings, Net of Debt Issuance Costs (1) (4,905 ) (3,459 ) Less: Current Maturities of Capital Lease Obligations (1) (402 ) — Long-Term Portion, Net $ 405,716 $ 32,735 (1) Current maturities of long-term debt includes $5,000 of current maturities, less $95 of unamortized debt issuance costs, under our 2017 Credit Agreement and $402 of current maturities of capital lease obligations. As of June 30, 2017 , we had outstanding borrowings under our 2017 Credit Agreement, totaling $97,750 under our term loan facility and $20,000 under our revolving facility. There were $300,000 in outstanding borrowings under the Notes as of June 30, 2017 . In addition, we had stand alone letters of credit and bank guarantees outstanding in the amount of $4,645 . Commitment fees on unused lines of credit for the six months ended June 30, 2017 were $200 . The overall weighted average cost of debt is approximately 4.9% and, net of a related cross-currency swap instrument, is approximately 4.2% . Further details regarding the cross-currency swap instrument are discussed in Note 11. Prudential Investment Management, Inc. In March 2017, we repaid $11,143 of debt evidenced by the notes issued under our Private Shelf Agreement, as described in Note 9 of our annual report on Form 10-K for the year ended December 31, 2016 , and terminated the Private Shelf Agreement. HSBC Bank (China) Company Limited, Shanghai Branch On June 20, 2012, we entered into a banking facility with the HSBC Bank (China) Company Limited, Shanghai Branch in the amount of $5,000 . As of June 30, 2017 , there were no outstanding borrowings on this facility.

Warranty

Warranty	6 Months Ended
	Jun. 30, 2017
Product Warranties Disclosures [Abstract]
Warranty	10. 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 six months ended June 30, 2017 and 2016 were as follows: Six Months Ended June 30 2017 2016 Beginning balance $ 10,960 $ 10,093 Additions charged to expense 5,815 5,946 Acquired warranty obligations 384 — Foreign currency fluctuations 154 48 Claims paid (5,872 ) (5,766 ) Ending balance $ 11,441 $ 10,321

Derivatives (Notes)

Derivatives (Notes)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	11. 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. We evaluate hedge effectiveness on our hedges that are designated and qualify for hedge accounting at the inception of the hedge prospectively, as well as retrospectively, and record any ineffective portion of the hedging instruments in Net Foreign Currency Transaction (Losses) Gains in our Condensed Consolidated Statements of Operations. The time value of purchased contracts is recorded in Net Foreign Currency Transaction (Losses) Gains in our Condensed Consolidated Statements of Operations. 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. These contracts hedge assets and liabilities that are denominated in foreign currencies and are carried at fair value as either assets or liabilities on the Condensed Consolidated Balance Sheets with changes in the fair value recorded to Net Foreign Currency Transaction (Losses) Gains in our Condensed Consolidated Statements of Operations. These contracts do not subject us to material balance sheet risk due to exchange rate movements because gains and losses on these derivatives are intended to offset gains and losses on the assets and liabilities being hedged. At June 30, 2017 and December 31, 2016 , the notional amounts of foreign currency forward exchange contracts outstanding not designated as hedging instruments were $71,415 and $42,866 , respectively. During the first quarter of 2017, in connection with our acquisition of IPC Group, we entered into a foreign currency option contract not designated as a hedging instrument for a notional amount of €180,000 . The option contract has since expired and there were no outstanding foreign currency option contracts not designated as hedging instruments as of June 30, 2017 and December 31, 2016 . 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 $2,781 and $2,127 as of June 30, 2017 and December 31, 2016 , respectively. The notional amounts of outstanding foreign currency option contracts designated as cash flow hedges were $8,989 and $8,522 as of June 30, 2017 and December 31, 2016 , respectively. To receive hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge, and the hedges must be highly effective in offsetting changes to future cash flows on hedged transactions. We record changes in the fair value of these cash flow hedges in Accumulated Other Comprehensive Loss in our Condensed Consolidated Balance Sheets, until the forecasted transaction occurs. When the forecasted transaction occurs, we reclassify the related gain or loss on the cash flow hedge to Net Sales in our Condensed Consolidated Statements of Operations. In the event the hedge becomes ineffective, the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, we reclassify the gain or loss on the related cash flow hedge from Accumulated Other Comprehensive Loss to Net Foreign Currency Transaction (Losses) Gains in our Condensed Consolidated Statements of Operations at that time. If we do not elect hedge accounting, or the contract does not qualify for hedge accounting treatment, the changes in fair value from period to period are recorded in Net Foreign Currency Transaction (Losses) Gains in our Condensed Consolidated Statements of Operations. 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. During the second quarter of 2017 we entered into Euro to US 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 entered 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. We designated these cross currency swaps as cash flow hedges. The hedged cash flows as of June 30, 2017 included €184,800 of total notional value. As of June 30, 2017 , the aggregate scheduled interest payments over the course of the loan and related swaps amounted to €34,800 . The scheduled maturity and principal payment of the loan and related swaps of €150,000 are due in April 2022 . There were no cross currency swaps designated as cash flow hedges as of December 31, 2016 . The fair value of derivative instruments on our Condensed Consolidated Balance Sheets as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 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) $ 78 $ — $ 184 $ — Foreign currency forward contracts (1) 10,154 26,090 — 13 Derivatives not designated as hedging instruments: Foreign currency option contracts — — — — Foreign currency forward contracts (1) $ 713 $ 1,324 $ 12 $ 162 (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, on 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 June 30, 2017 , we anticipate reclassifying approximately $2,252 of losses 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 six months ended June 30, 2017 was as follows: Three Months Ended Six Months Ended June 30, 2017 June 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 Income, net of tax (1) $ (47 ) $ (9,517 ) $ (137 ) $ (9,534 ) Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales 43 (83 ) 1 (102 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 449 — 449 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction (Losses) Gains — (7,148 ) — (7,148 ) Net (loss) gain recognized in earnings (2) (4 ) 3 (5 ) 5 Derivatives not designated as hedging instruments: Net loss recognized in earnings (3) $ — $ (3,939 ) $ (1,132 ) $ (5,307 ) 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 Operations for the three and six months ended June 30, 2016 was as follows: Three Months Ended Six Months Ended June 30, 2016 June 30, 2016 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 Income, net of tax (1) $ (44 ) $ (29 ) $ (230 ) $ (65 ) Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales — (84 ) — (26 ) Net loss recognized in earnings (2) — — (6 ) — Derivatives not designated as hedging instruments: Net loss recognized in earnings (3) $ — $ (371 ) $ — $ (2,062 ) (1) Net change in the fair value of the effective portion classified in Other Comprehensive Income. (2) Ineffective portion and amount excluded from effectiveness testing classified in Net Foreign Currency Transaction (Losses) Gains. (3) Classified in Net Foreign Currency Transaction (Losses) Gains.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	12. 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 on a recurring basis at June 30, 2017 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 10,867 $ — $ 10,867 $ — Foreign currency option contracts 78 — 78 — Total Assets $ 10,945 $ — $ 10,945 $ — Liabilities: Foreign currency forward exchange contracts $ 27,414 $ — $ 27,414 $ — Foreign currency option contracts $ — — — — Total Liabilities $ 27,414 $ — $ 27,414 $ — Our foreign currency forward and option exchange 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 11. 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 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 acquired 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, impaired asset or asset group exceeds its estimated fair value. These periodic impairment tests utilize company-specific assumptions involving significant unobservable inputs, or Level 3, in the fair value hierarchy.

Retirement Benefit Plans

Retirement Benefit Plans	6 Months Ended
	Jun. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Retirement Benefit Plans	13. 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, 2016 . We have contributed $186 and $86 during the second quarter of 2017 and $265 and $295 during the first six months of 2017 to our pension plans and postretirement medical plan, respectively. The components of the net periodic cost (benefit) for the three and six months ended June 30, 2017 and 2016 were as follows: Three Months Ended June 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2017 2016 2017 2016 2017 2016 Service cost $ — $ 97 $ 24 $ 36 $ 20 $ 24 Interest cost 390 415 129 103 90 100 Expected return on plan assets (586 ) (603 ) (101 ) (97 ) — — Amortization of net actuarial loss 11 8 — — — — Amortization of prior service cost — 10 49 32 — — Settlement charge 205 — — — — — Foreign currency — — 234 (16 ) — — Net periodic cost (benefit) $ 20 $ (73 ) $ 335 $ 58 $ 110 $ 124 Six Months Ended June 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2017 2016 2017 2016 2017 2016 Service cost $ — $ 177 $ 48 $ 72 $ 40 $ 48 Interest cost 780 830 219 208 181 199 Expected return on plan assets (1,171 ) (1,200 ) (197 ) (194 ) — — Amortization of net actuarial loss 21 17 — — — — Amortization of prior service cost — 21 96 64 — — Settlement charge 205 — — — — — Foreign currency — — 229 24 — — Net periodic (benefit) cost $ (165 ) $ (155 ) $ 395 $ 174 $ 221 $ 247

Commitments and Contingencies (

Commitments and Contingencies (Notes)	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments Contingencies and Guarantees [Text Block]	14. 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 June 30, 2017 , of those leases that contain residual value guarantees, the aggregate residual value at lease expiration was $14,700 , of which we have guaranteed $13,319 . As of June 30, 2017 , we have recorded a liability for the estimated end of term loss related to this residual value guarantee of $374 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. The minimum rentals for aggregate lease commitments as of June 30, 2017 were as follows: Remaining 2017 $ 7,702 2018 10,540 2019 7,074 2020 4,380 2021 2,488 Thereafter 4,183 Total $ 36,367

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss (Notes)	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Accumulated Other Comprehensive Loss	15. Accumulated Other Comprehensive Loss Components of Accumulated Other Comprehensive Loss, net of tax, within the Condensed Consolidated Balance Sheets, are as follows: June 30, 2017 December 31, 2016 Foreign currency translation adjustments $ (28,404 ) $ (44,444 ) Pension and retiree medical benefits (5,251 ) (5,391 ) Cash flow hedge (2,959 ) (88 ) Total Accumulated Other Comprehensive Loss $ (36,614 ) $ (49,923 ) 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, 2016 $ (44,444 ) $ (5,391 ) $ (88 ) $ (49,923 ) Other comprehensive income (loss) before reclassifications 16,040 127 (9,671 ) 6,496 Amounts reclassified from Accumulated Other Comprehensive Loss — 13 6,800 6,813 Net current period other comprehensive income (loss) $ 16,040 $ 140 $ (2,871 ) $ 13,309 June 30, 2017 $ (28,404 ) $ (5,251 ) $ (2,959 ) $ (36,614 )

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	16. 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 2013 and, with limited exceptions, state and foreign income tax examinations for taxable years before 2012 . We recognize potential accrued interest and penalties related to unrecognized tax benefits in Income Tax Expense. In addition to the liability of $2,790 for unrecognized tax benefits as of June 30, 2017 , there was approximately $536 for accrued interest and penalties. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate as of June 30, 2017 was $2,433 . 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. Unrecognized tax benefits were reduced by $138 during the first six months of 2017 as a result of the expiration of the statute of limitations in various jurisdictions and settlement with tax authorities. 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.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2017
Share-based Compensation [Abstract]
Share-Based Compensation	17. 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, 2016 . During the three months ended June 30, 2017 and 2016 , we recognized total Share-Based Compensation Expense of $1,049 and $1,789 , respectively. During the six months ended June 30, 2017 and 2016 , we recognized total Share-Based Compensation Expense of $3,622 and $4,426 , respectively. The total excess tax benefit recognized for share-based compensation arrangements during the six months ended June 30, 2017 and 2016 was $1,144 and $246 , respectively. During the first six months of 2017 , we granted 19,971 restricted shares. The weighted average grant date fair value of each share awarded was $73.16 . 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 six months ended June 30, 2017 and 2016 was $1,250 and $1,724 , respectively.

(Loss) Earnings Attributable to

(Loss) Earnings Attributable to Tennant Company Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
(Loss) Earnings Attributable to Tennant Company Per Share	18. (Loss) Earnings Attributable to Tennant Company Per Share The computations of Basic and Diluted (Loss) Earnings Attributable to Tennant Company per Share were as follows: Three Months Ended Six Months Ended June 30 June 30 2017 2016 2017 2016 Numerator: Net (Loss) Earnings Attributable to Tennant Company $ (2,591 ) $ 15,328 $ (6,548 ) $ 19,767 Denominator: Basic - Weighted Average Shares Outstanding 17,693,102 17,508,022 17,645,090 17,526,107 Effect of Dilutive Securities: Share-Based Compensation Plans — 425,221 — 428,060 Diluted - Weighted Average Shares Outstanding 17,693,102 17,933,243 17,645,090 17,954,167 Basic (Loss) Earnings per Share $ (0.15 ) $ 0.88 $ (0.37 ) $ 1.13 Diluted (Loss) Earnings per Share $ (0.15 ) $ 0.85 $ (0.37 ) $ 1.10 Excluded from the dilutive securities shown above were options to purchase 735,377 and 408,979 shares of Common Stock during the three months ended June 30, 2017 and 2016 , respectively. Excluded from the dilutive securities shown above were options to purchase 716,401 and 405,123 shares of Common Stock during the six months ended June 30, 2017 and 2016 , 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	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Reporting	19. 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. Net Sales attributed to each geographic area for the three and six months ended June 30, 2017 and 2016 were as follows: Three Months Ended Six Months Ended June 30 June 30 2017 2016 2017 2016 Americas $ 169,146 $ 163,857 $ 311,916 $ 297,410 EMEA 77,356 34,391 110,632 65,124 APAC 24,289 18,580 39,302 34,158 Total $ 270,791 $ 216,828 $ 461,850 $ 396,692 Net Sales are attributed to each geographic area based on the end user country and are net of intercompany sales.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	20. Related Party Transactions During the first quarter of 2008 , we acquired Sociedade Alfa Ltda. and entered into lease agreements for certain properties owned by or partially owned by the former owners of this entity. Some of these individuals are current employees of Tennant. Lease payments made under these lease agreements are not material to our financial position or results of operations.

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2017
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, 2016 . The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year.
Equity Method Investment	Equity Method Investment – Investments in which we have the ability to exercise significant influence, but do not control, are accounted for under the equity method of accounting and are included in Other Assets on the Condensed Consolidated Balance Sheets. Under this method of accounting, our share of the net earnings or losses of the investee are presented as a component of Other Expense, Net on the Condensed Consolidated Statements of Operations. The details regarding our equity method investment in i-team North America B.V., a joint venture that operates as the distributor of the i-mop in North America, are further described in Note 3.
New Accounting Pronouncements	New Accounting Pronouncements – In accordance with Accounting Standards Update ("ASU") No. 2016-09, C ompensation–Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , all excess tax benefits and tax deficiencies are recorded as a component of the provision for income taxes in the reporting period in which they occur. Additionally, we present excess tax benefits along with other income tax cash flows on the Condensed Consolidated Statements of Cash Flows as an operating activity rather than, as previously required, a financing activity. For further details regarding the implementation of this ASU and the impact on our financial statements, see Note 2.

Management Action (Tables)

Management Action (Tables)	6 Months Ended
	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Reconciliation of beginning and ending liability balances	A reconciliation to the ending liability balance of severance and related costs as of June 30, 2017 is as follows: Severance and Related Costs Q1 2017 restructuring action $ 7,057 Cash payments (5,297 ) Foreign currency adjustments 110 June 30, 2017 balance $ 1,870

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2017
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information	The following unaudited pro forma financial information presents the combined results of operations of Tennant Company as if the acquisition of IPC Group had occurred as of January 1, 2017 and 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 each year, nor does it attempt to project the future results of operations of the combined company. Pro Forma Financial Information (Unaudited) Three Months Ended Six Months Ended (In thousands, except per share data) June 30 June 30 2017 2016 2017 2016 Net Sales Pro forma $ 270,791 $ 269,689 $ 517,163 $ 497,896 As reported 270,791 216,828 461,850 396,692 Net Earnings (Loss) Attributable to Tennant Company Pro forma $ 10,308 $ 13,577 $ 10,260 $ 15,889 As reported (2,591 ) 15,328 (6,548 ) 19,767 Net Earnings (Loss) Attributable to Tennant Company per Share Pro forma $ 0.58 $ 0.76 $ 0.58 $ 0.88 As reported (0.15 ) 0.85 (0.37 ) 1.10
IPC Group
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary fair value measurement of the assets acquired and liabilities assumed as of the date of acquisition: ASSETS Restricted Cash 538 Receivables 40,067 Inventories 54,222 Other Current Assets 4,362 Assets Held for Sale 2,247 Property, Plant and Equipment 62,845 Intangible Assets Subject to Amortization: Trade Name 29,963 Customer Lists 115,571 Noncompete Agreements 3,210 Other Assets 4,168 Total Identifiable Assets Acquired 317,193 LIABILITIES Accounts Payable 31,529 Accrued Expenses 15,756 Deferred Income Taxes 58,573 Other Liabilities 6,967 Total Identifiable Liabilities Assumed 112,825 Net Identifiable Assets Acquired 204,368 Noncontrolling Interest (3,312 ) Goodwill 152,713 Total Estimated Purchase Price, net of Cash Acquired $ 353,769
Florock and Dofesa
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The preliminary components of the purchase price of the business combinations described above have been allocated as follows: Current Assets $ 5,949 Property, Plant and Equipment, net 4,112 Identified Intangible Assets 6,055 Goodwill 1,739 Other Assets 7 Total Assets Acquired 17,862 Current Liabilities 4,764 Other Liabilities 53 Total Liabilities Assumed 4,817 Net Assets Acquired $ 13,045

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories	Inventories are valued at the lower of cost or market. Inventories at June 30, 2017 and December 31, 2016 consisted of the following: June 30, December 31, Inventories carried at LIFO: Finished goods $ 45,562 $ 39,142 Raw materials, production parts and work-in-process 25,107 23,980 LIFO reserve (28,190 ) (28,190 ) Total LIFO inventories 42,479 34,932 Inventories carried at FIFO: Finished goods 57,771 31,044 Raw materials, production parts and work-in-process 41,329 12,646 Total FIFO inventories 99,100 43,690 Total inventories $ 141,579 $ 78,622

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the carrying amount of Goodwill	The changes in the carrying value of Goodwill for the six months ended June 30, 2017 were as follows: Goodwill Accumulated Impairment Losses Total Balance as of December 31, 2016 $ 58,397 $ (37,332 ) $ 21,065 Additions 152,713 — 152,713 Purchase accounting adjustments (2,048 ) — (2,048 ) Foreign currency fluctuations 13,736 (2,216 ) 11,520 Balance as of June 30, 2017 $ 222,798 $ (39,548 ) $ 183,250
Acquired Intangible Assets excluding Goodwill	The balances of acquired Intangible Assets, excluding Goodwill, as of June 30, 2017 and December 31, 2016 , were as follows: Customer Lists Trade Name Technology Noncompete Agreement Total Balance as of June 30, 2017 Original cost $ 136,503 $ 33,954 $ 5,247 $ 3,424 $ 179,128 Accumulated amortization (8,697 ) (823 ) (2,982 ) (428 ) (12,930 ) Carrying value $ 127,806 $ 33,131 $ 2,265 $ 2,996 $ 166,198 Weighted average original life (in years) 15 11 14 2 Balance as of December 31, 2016 Original cost $ 8,016 $ 2,000 $ 5,136 $ — $ 15,152 Accumulated amortization (5,948 ) — (2,744 ) — (8,692 ) Carrying value $ 2,068 $ 2,000 $ 2,392 $ — $ 6,460 Weighted average original life (in years) 15 15 13 0
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 2017 $ 7,043 2018 14,085 2019 12,801 2020 12,374 2021 12,374 Thereafter 107,521 Total $ 166,198

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Summary of outstanding Long-Term Debt	Debt outstanding at June 30, 2017 is summarized as follows: June 30, December 31, Long-Term Debt: Senior Unsecured Notes $ 300,000 $ — Credit Facility Borrowings 117,750 36,143 Capital Lease Obligations 688 51 Total Long-Term Debt 418,438 36,194 Less: Unamortized Debt Issuance Costs (7,415 ) — Less: Current Maturities of Credit Facility Borrowings, Net of Debt Issuance Costs (1) (4,905 ) (3,459 ) Less: Current Maturities of Capital Lease Obligations (1) (402 ) — Long-Term Portion, Net $ 405,716 $ 32,735 (1) Current maturities of long-term debt includes $5,000 of current maturities, less $95 of unamortized debt issuance costs, under our 2017 Credit Agreement and $402 of current maturities of capital lease obligations.

Warranty (Tables)

Warranty (Tables)	6 Months Ended
	Jun. 30, 2017
Product Warranties Disclosures [Abstract]
Changes in warranty reserve	The changes in warranty reserves for the six months ended June 30, 2017 and 2016 were as follows: Six Months Ended June 30 2017 2016 Beginning balance $ 10,960 $ 10,093 Additions charged to expense 5,815 5,946 Acquired warranty obligations 384 — Foreign currency fluctuations 154 48 Claims paid (5,872 ) (5,766 ) Ending balance $ 11,441 $ 10,321

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 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) $ 78 $ — $ 184 $ — Foreign currency forward contracts (1) 10,154 26,090 — 13 Derivatives not designated as hedging instruments: Foreign currency option contracts — — — — Foreign currency forward contracts (1) $ 713 $ 1,324 $ 12 $ 162 (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, on 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 six months ended June 30, 2017 was as follows: Three Months Ended Six Months Ended June 30, 2017 June 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 Income, net of tax (1) $ (47 ) $ (9,517 ) $ (137 ) $ (9,534 ) Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales 43 (83 ) 1 (102 ) Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income — 449 — 449 Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction (Losses) Gains — (7,148 ) — (7,148 ) Net (loss) gain recognized in earnings (2) (4 ) 3 (5 ) 5 Derivatives not designated as hedging instruments: Net loss recognized in earnings (3) $ — $ (3,939 ) $ (1,132 ) $ (5,307 ) 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 Operations for the three and six months ended June 30, 2016 was as follows: Three Months Ended Six Months Ended June 30, 2016 June 30, 2016 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 Income, net of tax (1) $ (44 ) $ (29 ) $ (230 ) $ (65 ) Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales — (84 ) — (26 ) Net loss recognized in earnings (2) — — (6 ) — Derivatives not designated as hedging instruments: Net loss recognized in earnings (3) $ — $ (371 ) $ — $ (2,062 ) (1) Net change in the fair value of the effective portion classified in Other Comprehensive Income. (2) Ineffective portion and amount excluded from effectiveness testing classified in Net Foreign Currency Transaction (Losses) Gains. (3) Classified in Net Foreign Currency Transaction (Losses) Gains.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair value measurements of assets and liabilities	Our population of assets and liabilities subject to fair value measurements on a recurring basis at June 30, 2017 is as follows: Fair Value Level 1 Level 2 Level 3 Assets: Foreign currency forward exchange contracts $ 10,867 $ — $ 10,867 $ — Foreign currency option contracts 78 — 78 — Total Assets $ 10,945 $ — $ 10,945 $ — Liabilities: Foreign currency forward exchange contracts $ 27,414 $ — $ 27,414 $ — Foreign currency option contracts $ — — — — Total Liabilities $ 27,414 $ — $ 27,414 $ —

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Components of the net periodic cost (benefit)	The components of the net periodic cost (benefit) for the three and six months ended June 30, 2017 and 2016 were as follows: Three Months Ended June 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2017 2016 2017 2016 2017 2016 Service cost $ — $ 97 $ 24 $ 36 $ 20 $ 24 Interest cost 390 415 129 103 90 100 Expected return on plan assets (586 ) (603 ) (101 ) (97 ) — — Amortization of net actuarial loss 11 8 — — — — Amortization of prior service cost — 10 49 32 — — Settlement charge 205 — — — — — Foreign currency — — 234 (16 ) — — Net periodic cost (benefit) $ 20 $ (73 ) $ 335 $ 58 $ 110 $ 124 Six Months Ended June 30 Pension Benefits Postretirement U.S. Plans Non-U.S. Plans Medical Benefits 2017 2016 2017 2016 2017 2016 Service cost $ — $ 177 $ 48 $ 72 $ 40 $ 48 Interest cost 780 830 219 208 181 199 Expected return on plan assets (1,171 ) (1,200 ) (197 ) (194 ) — — Amortization of net actuarial loss 21 17 — — — — Amortization of prior service cost — 21 96 64 — — Settlement charge 205 — — — — — Foreign currency — — 229 24 — — Net periodic (benefit) cost $ (165 ) $ (155 ) $ 395 $ 174 $ 221 $ 247

Commitments and Contingencies37

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Minimum Rentals for Aggregate Lease Commitments	The minimum rentals for aggregate lease commitments as of June 30, 2017 were as follows: Remaining 2017 $ 7,702 2018 10,540 2019 7,074 2020 4,380 2021 2,488 Thereafter 4,183 Total $ 36,367

Accumulated Other Comprehensi38

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2017
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: June 30, 2017 December 31, 2016 Foreign currency translation adjustments $ (28,404 ) $ (44,444 ) Pension and retiree medical benefits (5,251 ) (5,391 ) Cash flow hedge (2,959 ) (88 ) Total Accumulated Other Comprehensive Loss $ (36,614 ) $ (49,923 )
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, 2016 $ (44,444 ) $ (5,391 ) $ (88 ) $ (49,923 ) Other comprehensive income (loss) before reclassifications 16,040 127 (9,671 ) 6,496 Amounts reclassified from Accumulated Other Comprehensive Loss — 13 6,800 6,813 Net current period other comprehensive income (loss) $ 16,040 $ 140 $ (2,871 ) $ 13,309 June 30, 2017 $ (28,404 ) $ (5,251 ) $ (2,959 ) $ (36,614 )

(Loss) Earnings Attributable 39

(Loss) Earnings Attributable to Tennant Company Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted (Loss) Earnings per Share	The computations of Basic and Diluted (Loss) Earnings Attributable to Tennant Company per Share were as follows: Three Months Ended Six Months Ended June 30 June 30 2017 2016 2017 2016 Numerator: Net (Loss) Earnings Attributable to Tennant Company $ (2,591 ) $ 15,328 $ (6,548 ) $ 19,767 Denominator: Basic - Weighted Average Shares Outstanding 17,693,102 17,508,022 17,645,090 17,526,107 Effect of Dilutive Securities: Share-Based Compensation Plans — 425,221 — 428,060 Diluted - Weighted Average Shares Outstanding 17,693,102 17,933,243 17,645,090 17,954,167 Basic (Loss) Earnings per Share $ (0.15 ) $ 0.88 $ (0.37 ) $ 1.13 Diluted (Loss) Earnings per Share $ (0.15 ) $ 0.85 $ (0.37 ) $ 1.10

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Net Sales by geographic area	Net Sales attributed to each geographic area for the three and six months ended June 30, 2017 and 2016 were as follows: Three Months Ended Six Months Ended June 30 June 30 2017 2016 2017 2016 Americas $ 169,146 $ 163,857 $ 311,916 $ 297,410 EMEA 77,356 34,391 110,632 65,124 APAC 24,289 18,580 39,302 34,158 Total $ 270,791 $ 216,828 $ 461,850 $ 396,692

Newly Adopted Accounting Pron41

Newly Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Discrete tax benefits recognized related to excess tax benefits, Amount	$ 742	$ 1,144

Investment in Joint Venture (De

Investment in Joint Venture (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investment, Ownership Percentage	50.00%
Carrying value of Investment in Joint Venture	$ 57
Loan to joint venture, Amount	$ 1,500	$ 0

Management Action (Details)

Management Action (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 8,018
Other associated restructuring charges	$ 961
Approximate time anticipated savings will offset the restructuring charge	1 year
Restructuring Reserve [Roll Forward]
Q1 2017 restructuring action	$ 7,057
Cash Payments	(5,297)
Foreign currency adjustments	110
June 30, 2017 balance	$ 1,870

Acquisitions (Details 1)

Acquisitions (Details 1) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)	Apr. 06, 2017USD ($)
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
IPC Group
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Apr. 6, 2017
Business Acquisition, Name of Acquired Entity	IP Cleaning S.p.A. and its subsidiaries ("IPC Group")
Business Combination, Consideration Transferred	$ 353,769
Cash Acquired from Acquisition	$ 10,652
Debt Instrument, Face Amount			$ 420,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			112,825
Business Acquisition, Transaction Costs			$ 4,684
Crawford Laboratories, Inc.
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jul. 28, 2016
Business Acquisition, Name of Acquired Entity	Crawford Laboratories, Inc. and affiliates thereof ("Sellers")
Business Combination, Consideration Transferred	$ 11,843
Payments to Acquire Businesses, Gross		$ 10,965
Payment to Acquire Businesses, Deferred	$ 878
Business Acquisition, Number of Deferred Payments	2
Business Acquisition, Amount of first deferred payment		575
Dofesa Barrido Mecanizado
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Sep. 1, 2016
Business Acquisition, Name of Acquired Entity	Dofesa Barrido Mecanizado ("Dofesa")
Business Combination, Consideration Transferred	$ 5,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	3,448
Business Combination, Consideration Transferred, Net	1,552
Payments to Acquire Businesses, Gross		1,202
Payment to Acquire Businesses, Deferred	$ 350
Business Acquisition, Transaction Costs		$ 191

Acquisitions (Details 2)

Acquisitions (Details 2) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Identified Intangible Assets	$ 148,744
Goodwill	183,250	$ 21,065
Florock and Dofesa
Business Acquisition [Line Items]
Current Assets	5,949
Property, Plant and Equipment, net	4,112
Identified Intangible Assets	6,055
Goodwill	1,739
Other Assets	7
Total Assets Acquired	17,862
Current Liabilities	4,764
Other Liabilities	53
Total Identifiable Liabilities Assumed	4,817
Total Estimated Purchase Price, net of Cash Acquired	$ 13,045

Acquisitions (Details 3)

Acquisitions (Details 3) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Apr. 06, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Business Combination, Acquired Receivables, Gross Contractual Amount		$ 43,785
Business Combination, Acquired Receivables, Estimated Uncollectible		3,718
ASSETS
Identified Intangible Assets	$ 148,744
LIABILITIES
Goodwill	183,250		$ 21,065
IPC Group
Business Acquisition [Line Items]
Revenue of Acquiree since Acquisition Date	59,074
Loss of Acquiree since Acquisition Date	(5,187)
Fair Value Step-Up Adjustment to Acquired Inventory, Net Of Tax	$ 4,470
Business Acquisition, Transaction Costs		4,684
Preliminary Fair Value of Intangible Assets		148,744
ASSETS
Restricted Cash		538
Receivables		40,067
Inventories		54,222
Other Current Assets		4,362
Assets Held for Sale		2,247
Property, Plant and Equipment		62,845
Other Assets		4,168
Total Identifiable Assets Acquired		317,193
LIABILITIES
Accounts Payable		31,529
Accrued Expenses		15,756
Deferred Income Taxes		58,573
Other Liabilities		6,967
Total Identifiable Liabilities Assumed		112,825
Net Identifiable Assets Acquired		204,368
Noncontrolling Interest		(3,312)
Goodwill		152,713
Total Estimated Purchase Price, net of Cash Acquired		353,769
Customer Lists | IPC Group
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
ASSETS
Identified Intangible Assets		115,571
Trade Name | IPC Group
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	11 years
ASSETS
Identified Intangible Assets		29,963
Noncompete Agreement | IPC Group
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
ASSETS
Identified Intangible Assets		$ 3,210

Acquisitions (Details 4)

Acquisitions (Details 4) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Sales
Pro forma	$ 270,791	$ 269,689	$ 517,163	$ 497,896
As reported	270,791	216,828	461,850	396,692
Net Earnings (Loss) Attributable to Tennant Company
Pro forma	10,308	13,577	10,260	15,889
As reported	$ (2,591)	$ 15,328	$ (6,548)	$ 19,767
Net Earnings (Loss) Attributable to Tennant Company per Share
Pro forma	$ 0.58	$ 0.76	$ 0.58	$ 0.88
Diluted (Loss) Earnings per Share	$ (0.15)	$ 0.85	$ (0.37)	$ 1.10
Fair Value Step-Up Adjustment To Acquired Inventory, Pro Forma Adjustment	$ 6,199		$ 6,199

Divestiture (Details)

Divestiture (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jan. 31, 2016
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Date of divestiture			Jan. 31, 2016
Total selling price					$ 5,774
Loss on Sale of Business	$ 0	$ 87	$ 0	$ 149
Relative size of the disposal group compared to the total company, in terms of revenue			2.00%

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventories carried at LIFO:
Finished goods	$ 45,562	$ 39,142
Raw materials, production parts and work-in-process	25,107	23,980
LIFO reserve	(28,190)	(28,190)
Total LIFO inventories	42,479	34,932
Inventories carried at FIFO:
Finished goods	57,771	31,044
Raw materials, production parts and work-in-process	41,329	12,646
Total FIFO inventories	99,100	43,690
Total inventories	$ 141,579	$ 78,622

Goodwill and Intangible Asset50

Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Goodwill, Gross
Balance, beginning of period			$ 58,397
Additions			152,713
Purchase accounting adjustments			(2,048)
Foreign currency fluctuations			13,736
Balance, end of period	$ 222,798		222,798		$ 58,397
Accumulated Impairment Losses
Balance, beginning of period			(37,332)
Foreign currency fluctuations			(2,216)
Balance, end of period	(39,548)		(39,548)		(37,332)
Goodwill, Net
Balance, beginning of period			21,065
Additions			152,713
Purchase accounting adjustments			(2,048)
Foreign currency fluctuations			11,520
Balance, end of period	183,250		183,250		21,065
Acquired Finite-lived Intangible Assets
Original cost	179,128		179,128		15,152
Accumulated amortization	(12,930)		(12,930)		(8,692)
Intangible Assets, Net	166,198		166,198		6,460
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	148,744		148,744
Purchase of Intangible Assets			$ 2,500	$ 0
Finite-Lived Intangible Asset, Useful Life			5 years
Amortization expense	3,536	$ 112	$ 3,780	$ 224
Estimated aggregate amortization expense of Intangible Assets
Remaining 2,017	7,043		7,043
2,018	14,085		14,085
2,019	12,801		12,801
2,020	12,374		12,374
2,021	12,374		12,374
Thereafter	107,521		107,521
Total	166,198		166,198
Customer Lists
Acquired Finite-lived Intangible Assets
Original cost	136,503		136,503		8,016
Accumulated amortization	(8,697)		(8,697)		(5,948)
Intangible Assets, Net	127,806		$ 127,806		$ 2,068
Weighted-average original life			15 years		15 years
Trade Name
Acquired Finite-lived Intangible Assets
Original cost	33,954		$ 33,954		$ 2,000
Accumulated amortization	(823)		(823)		0
Intangible Assets, Net	33,131		$ 33,131		$ 2,000
Weighted-average original life			11 years		15 years
Technology
Acquired Finite-lived Intangible Assets
Original cost	5,247		$ 5,247		$ 5,136
Accumulated amortization	(2,982)		(2,982)		(2,744)
Intangible Assets, Net	2,265		$ 2,265		$ 2,392
Weighted-average original life			14 years		13 years
Noncompete Agreement
Acquired Finite-lived Intangible Assets
Original cost	3,424		$ 3,424		$ 0
Accumulated amortization	(428)		(428)		0
Intangible Assets, Net	$ 2,996		$ 2,996		$ 0
Weighted-average original life			2 years		0 years

Debt (Details 1)

Debt (Details 1) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Apr. 18, 2017	Apr. 04, 2017	Dec. 31, 2016
Debt Instrument
Registration Rights Agreement, Effective Date	Apr. 18, 2017
Registration Rights Agreement Term	360 days
Long-term Debt
Total Debt	$ 418,438			$ 36,194
Less: Unamortized Debt Issuance Costs	(7,415)			0
Less: Current Maturities of Capital Lease Obligations	(402)			0
Long-Term Portion	405,716			32,735
Current Maturities of Long-Term Debt	5,307			3,459
Letters of Credit Outstanding	4,645
Commitment fees on unused line of credit	$ 200
Weighted average interest rate	4.87%
Debt, Weighted Average Interest Rate, net of Currency Swap Contract	4.20%
Senior Notes due 2025
Debt Instrument
Debt Instrument, Interest Rate, Stated Percentage	5.625%
Bonds, Initiation Date	Apr. 18, 2017
Debt Instrument, Face Amount		$ 300,000
Debt Instrument, Maturity Date	May 1, 2025
Long-term Debt
Total Debt	$ 300,000			0
Term Loan Facility
Debt Instrument
Outstanding Borrowings	97,750
Long-term Debt
Less: Current Maturities of Credit Facility Borrowings, Net of Debt Issuance Costs	(4,905)			(3,459)
Current Maturities of Long-Term Debt	5,000
Unamortized Debt Issuance Costs, Current Portion	95
Revolving Facility
Debt Instrument
Outstanding Borrowings	20,000
Capital lease obligations
Long-term Debt
Total Debt	$ 688			51
JPMorgan, 2017 Credit Agreement
Debt Instrument
Line of Credit Facility, Initiation Date	Apr. 4, 2017
Line of Credit Facility, Expiration Date	Apr. 4, 2022
Line Of Credit Facility, Interest rate margin spread added to Federal Funds Rate on US Dollar borrowings	0.50%
Line Of Credit Facility, Minimum LIBOR one month interest rate on borrowings denominated in US dollars	0.00%
Line Of Credit Facility, Interest rate margin spread added to LIBOR rate on US Dollar borrowings	1.00%
Line Of Credit Facility, Minimum LIBOR one month interest rate on eurocurrency borrowings	0.00%
Long-term Debt
Total Debt	$ 117,750
JPMorgan, 2017 Credit Agreement | Term Loan Facility
Debt Instrument
Line of Credit Facility, Current Borrowing Capacity	$ 400,000
Line Of Credit Facility, Minimum interest rate margin spread added to LIBOR rate on US Dollar borrowings	0.25%
Line Of Credit Facility, Maximum interest rate margin spread added to LIBOR rate on US Dollar borrowings	1.25%
Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	1.25%
Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	2.25%
Debt Instrument, Face Amount		$ 300,000
JPMorgan, 2017 Credit Agreement | Revolving Facility
Debt Instrument
Line of Credit Facility, Current Borrowing Capacity	$ 200,000
Line Of Credit Facility, Additional Borrowing Capacity Available	$ 150,000
Line Of Credit Facility, Minimum commitment fee percentage	0.175%
Line Of Credit Facility, Maximum commitment fee percentage	0.35%
Line Of Credit Facility, Minimum interest rate margin spread added to LIBOR rate on US Dollar borrowings	0.075%
Line Of Credit Facility, Maximum interest rate margin spread added to LIBOR rate on US Dollar borrowings	0.90%
Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	1.075%
Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	1.90%
JPMorgan, Previous Credit Agreement
Debt Instrument
Outstanding Borrowings			$ 45,000
Long-term Debt
Total Debt				$ 36,143
Prudential Investment Management, Inc.
Long-term Debt
Repayments of Long-term Debt	$ 11,143
HSBC Bank (China) Company Limited, Shanghai Branch
Debt Instrument
Outstanding Borrowings	0
Long-term Debt
Maximum borrowing capacity	$ 5,000

Warranty (Details)

Warranty (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Product Warranties Disclosures [Abstract]
Warranty terms, minimum	1 year
Warranty terms, maximum	4 years
Period of time following a sale the majority of claims are paid, min	6 months
Period of time following a sale the majority of claims are paid, max	9 months
Changes in warranty reserves
Beginning balance	$ 10,960	$ 10,093
Additions charged to expense	5,815	5,946
Acquired warranty obligations	384	0
Foreign currency fluctuations	154	48
Claims paid	(5,872)	(5,766)
Ending balance	$ 11,441	$ 10,321

Derivatives (Details 1)

Derivatives (Details 1) € in Thousands, $ in Thousands		6 Months Ended
		Jun. 30, 2017EUR (€)	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Derivatives not designated as hedging instruments | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Notional Amount				$ 71,415	$ 42,866
Fair Value Asset Derivatives	[1]			713	12
Fair Value Liability Derivatives	[1]			1,324	162
Derivatives not designated as hedging instruments | Foreign currency option contracts
Derivatives, Fair Value [Line Items]
Notional Amount		€ 180,000			0
Fair Value Asset Derivatives				0	0
Fair Value Liability Derivatives				0	0
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			$ 2,252
Derivatives designated as hedging instruments | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Notional Amount				2,781	2,127
Fair Value Asset Derivatives	[1]			10,154	0
Fair Value Liability Derivatives	[1]			26,090	13
Derivatives designated as hedging instruments | Foreign currency option contracts
Derivatives, Fair Value [Line Items]
Notional Amount				8,989	8,522
Fair Value Asset Derivatives	[1]			78	184
Fair Value Liability Derivatives	[1]			$ 0	0
Derivatives designated as hedging instruments | Cross currency swap contracts
Derivatives, Fair Value [Line Items]
Notional Amount		€ 184,800			$ 0
Aggregate interest paid over the course of the loan | €		34,800
Debt Instrument, Face Amount | €		€ 150,000
Derivative, Maturity Date		Apr. 4, 2022	Apr. 4, 2022
[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, on 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		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Foreign currency option contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net loss recognized in earnings	[1]	$ 0	$ 0	$ (1,132)	$ 0
Foreign currency option contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net loss recognized in Other Comprehensive Income, net of tax	[2]	(47)	(44)	(137)	(230)
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales		43	0	1	0
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income		0		0
Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction (Losses) Gains		0		0
Net (loss) gain recognized in earnings	[3]	(4)	0	(5)	(6)
Foreign currency forward contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net loss recognized in earnings	[1]	(3,939)	(371)	(5,307)	(2,062)
Foreign currency forward contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net loss recognized in Other Comprehensive Income, net of tax	[2]	(9,517)	(29)	(9,534)	(65)
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Sales		(83)	(84)	(102)	(26)
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income		449		449
Net loss reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction (Losses) Gains		(7,148)		(7,148)
Net (loss) gain recognized in earnings	[3]	$ 3	$ 0	$ 5	$ 0
[1]	Classified in Net Foreign Currency Transaction (Losses) Gains.
[2]	Net change in the fair value of the effective portion classified in Other Comprehensive Income
[3]	Ineffective portion and amount excluded from effectiveness testing classified in Net Foreign Currency Transaction (Losses) Gains.

Fair Value Measurements (Detail

Fair Value Measurements (Details) $ in Thousands	Jun. 30, 2017USD ($)
Level 1
Assets:
Total Assets	$ 0
Liabilities:
Total Liabilities	0
Level 1 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	0
Liabilities:
Foreign currency contract, liability fair value	0
Level 1 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0
Liabilities:
Foreign currency contract, liability fair value	0
Level 2
Assets:
Total Assets	10,945
Liabilities:
Total Liabilities	27,414
Level 2 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	10,867
Liabilities:
Foreign currency contract, liability fair value	27,414
Level 2 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	78
Liabilities:
Foreign currency contract, liability fair value	0
Level 3
Assets:
Total Assets	0
Liabilities:
Total Liabilities	0
Level 3 | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	0
Liabilities:
Foreign currency contract, liability fair value	0
Level 3 | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	0
Liabilities:
Foreign currency contract, liability fair value	0
Fair Value
Assets:
Total Assets	10,945
Liabilities:
Total Liabilities	27,414
Fair Value | Foreign currency forward exchange contracts
Assets:
Foreign currency contract, asset fair value	10,867
Liabilities:
Foreign currency contract, liability fair value	27,414
Fair Value | Foreign currency option contracts
Assets:
Foreign currency contract, asset fair value	78
Liabilities:
Foreign currency contract, liability fair value	$ 0

Retirement Benefit Plans (Detai

Retirement Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Plan contributions	$ 186		$ 265
U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	0	$ 97	0	$ 177
Interest cost	390	415	780	830
Expected return on plan assets	(586)	(603)	(1,171)	(1,200)
Amortization of net actuarial loss	11	8	21	17
Amortization of prior service cost	0	10	0	21
Settlement charge	205	0	205	0
Foreign currency	0	0	0	0
Net periodic cost (benefit)	20	(73)	(165)	(155)
Non-U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	24	36	48	72
Interest cost	129	103	219	208
Expected return on plan assets	(101)	(97)	(197)	(194)
Amortization of net actuarial loss	0	0	0	0
Amortization of prior service cost	49	32	96	64
Settlement charge	0	0	0	0
Foreign currency	234	(16)	229	24
Net periodic cost (benefit)	335	58	395	174
Postretirement Medical Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Plan contributions	86		295
Service cost	20	24	40	48
Interest cost	90	100	181	199
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
Settlement charge	0	0	0	0
Foreign currency	0	0	0	0
Net periodic cost (benefit)	$ 110	$ 124	$ 221	$ 247

Commitments and Contingencies57

Commitments and Contingencies (Details) $ in Thousands	Jun. 30, 2017USD ($)
Long-term Purchase Commitment [Line Items]
Aggregate residual value at lease expiration for vehicle leases	$ 14,700
Guaranteed aggregate residual value at lease expiration for vehicle leases	13,319
Liability for the estimated end of term loss related to residual value guarantee	374
Minimum Rentals for Aggregate Lease Commitments
Remaining 2,017	7,702
2,018	10,540
2,019	7,074
2,020	4,380
2,021	2,488
Thereafter	4,183
Total	$ 36,367

Accumulated Other Comprehensi58

Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Equity [Abstract]
Foreign currency translation adjustments	$ (28,404)	$ (44,444)
Pension and retiree medical benefits	(5,251)	(5,391)
Cash flow hedge	(2,959)	(88)
Total Accumulated Other Comprehensive Loss	$ (36,614)	$ (49,923)

Accumulated Other Comprehensi59

Accumulated Other Comprehensive Loss (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Components of Other Comprehensive Loss
Balance at the beginning of the year			$ (49,923)
Other comprehensive income (loss) before reclassifications			6,496
Amounts reclassified from Accumulated Other Comprehensive Loss			6,813
Total Other Comprehensive Income, Net of Tax	$ 10,963	$ 425	13,309	$ 3,759
Balance at the end of the period	(36,614)		(36,614)
Foreign Currency Translation Adjustments
Components of Other Comprehensive Loss
Balance at the beginning of the year			(44,444)
Other comprehensive income (loss) before reclassifications			16,040
Amounts reclassified from Accumulated Other Comprehensive Loss			0
Total Other Comprehensive Income, Net of Tax			16,040
Balance at the end of the period	(28,404)		(28,404)
Pension and Post Retirement Benefits
Components of Other Comprehensive Loss
Balance at the beginning of the year			(5,391)
Other comprehensive income (loss) before reclassifications			127
Amounts reclassified from Accumulated Other Comprehensive Loss			13
Total Other Comprehensive Income, Net of Tax			140
Balance at the end of the period	(5,251)		(5,251)
Cash Flow Hedge
Components of Other Comprehensive Loss
Balance at the beginning of the year			(88)
Other comprehensive income (loss) before reclassifications			(9,671)
Amounts reclassified from Accumulated Other Comprehensive Loss			6,800
Total Other Comprehensive Income, Net of Tax			(2,871)
Balance at the end of the period	$ (2,959)		$ (2,959)

Income Taxes (Details)

Income Taxes (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefits	$ 2,790
Unrecognized tax benefits, income tax penalties and interest accrued	536
Unrecognized tax benefits that would impact the effective tax rate	2,433
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations	$ 138
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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Expense	$ 1,049	$ 1,789	$ 3,622	$ 4,426
Excess Tax Benefit on Stock Plans, 2017			1,144
Excess Tax Benefit on Stock Plans, 2016			$ 0	246
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award
Shares granted			19,971
Weighted average grant date fair value, in dollars per share			$ 73.16
Vesting period of new awards granted			3 years
Fair value of shares vested			$ 1,250	$ 1,724

(Loss) Earnings Attributable 62

(Loss) Earnings Attributable to Tennant Company Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net (Loss) Earnings Attributable to Tennant Company	$ (2,591)	$ 15,328	$ (6,548)	$ 19,767
Denominator:
Basic - Weighted Average Shares Outstanding	17,693,102	17,508,022	17,645,090	17,526,107
Effect of dilutive securities:
Share-based compensation plans	0	425,221	0	428,060
Diluted - Weighted Average Shares Outstanding	17,693,102	17,933,243	17,645,090	17,954,167
Basic (Loss) Earnings per Share	$ (0.15)	$ 0.88	$ (0.37)	$ 1.13
Diluted (Loss) Earnings per Share	$ (0.15)	$ 0.85	$ (0.37)	$ 1.10
Anti-dilutive securities excluded from earnings per share calculation	735,377	408,979	716,401	405,123

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)
Segment Reporting [Abstract]
Number of operating segments			4
Number of reportable segments			1
Revenues from External Customers
Net Sales	$ 270,791	$ 216,828	$ 461,850	$ 396,692
Americas
Revenues from External Customers
Net Sales	169,146	163,857	311,916	297,410
EMEA
Revenues from External Customers
Net Sales	77,356	34,391	110,632	65,124
APAC
Revenues from External Customers
Net Sales	$ 24,289	$ 18,580	$ 39,302	$ 34,158