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