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Consolidated Quarterly Data (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Consolidated Quarterly Data (Unaudited) |
| Consolidated Quarterly Data (Unaudited)
| 2018
| Q1 |  | Q2 |  | Q3 |  | Q4
Net Sales | $ | 272,847 |  |  | $ | 292,197 |  |  | $ | 273,255 |  |  | $ | 285,212 |
Gross Profit | 109,116 |  | (a) | 117,225 |  | (a) | 106,509 |  | (a) | 112,172 |
Net Earnings Attributable to Tennant Company | 3,274 |  |  | 12,744 |  |  | 9,676 |  |  | 7,717 |
Basic Earnings Attributable to Tennant Company per Share | $ | 0.18 |  |  | $ | 0.71 |  |  | $ | 0.54 |  |  | $ | 0.43 |
Diluted Earnings Attributable to Tennant Company per Share | $ | 0.18 |  |  | $ | 0.69 |  |  | $ | 0.52 |  |  | $ | 0.42 |
(a) Amounts have been revised for misclassifications between Cost of Sales and Selling and Administrative Expense. See Note 3 for further information. Gross Profit was reduced by $1,521, $1,574, and $1,576 for Q1 2018, Q2 2018 and Q3 2018, respectively, and Selling and Administrative Expense was decreased by the same amounts during those periods.
| 2017 |
| Q1 |  | Q2 |  | Q3 |  | Q4 |
Net Sales | $ | 191,059 |  |  | $ | 270,791 |  |  | $ | 261,921 |  |  | $ | 279,295 |  |
Gross Profit | 79,736 |  |  | 103,130 |  | (a) | 103,081 |  | (a) | 113,866 |  | (a)
Net (Loss) Earnings Attributable to Tennant Company | (3,957 | ) |  | (2,591 | ) |  | 3,559 |  |  | (3,206 | ) |
Basic (Loss) Earnings Attributable to Tennant Company per Share | $ | (0.22 | ) |  | $ | (0.15 | ) |  | $ | 0.20 |  |  | $ | (0.18 | ) |
Diluted (Loss) Earnings Attributable to Tennant Company per Share | $ | (0.22 | ) |  | $ | (0.15 | ) |  | $ | 0.20 |  |  | $ | (0.18 | ) |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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