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Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Tennant Company Shareholders' Equity | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2018 | $ 316.3 | $ 6.8 | $ 28.5 | $ 316.3 | $ (37.2) | $ 314.4 | $ 1.9
Balance (in shares) at Dec. 31, 2018 |  | 18,125,201 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net Earnings (Loss) | 5.4 | $ 0.0 | 0.0 | 5.4 | 0.0 | 5.4 | 0.0
Other Comprehensive (Loss) Income | (1.3) | $ 0.0 | 0.0 | 0.0 | (1.3) | (1.3) | 0.0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares) |  | 35,338 |  |  |  |  |
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) | 0.2 | $ 0.0 | 0.2 | 0.0 | 0.0 | 0.2 | 0.0
Share-Based Compensation | 3.3 | 0.0 | 3.3 | 0.0 | 0.0 | 3.3 | 0.0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share | (4.0) | 0.0 | 0.0 | (4.0) | 0.0 | (4.0) | 0.0
Recognition of Noncontrolling Interests | 0.3 | $ 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3
Balance (in shares) at Mar. 31, 2019 |  | 18,160,539 |  |  |  |  |
Ending balance at Mar. 31, 2019 | 320.2 | $ 6.8 | 32.0 | 317.7 | (38.5) | 318.0 | 2.2
Beginning balance at Dec. 31, 2018 | 316.3 | $ 6.8 | 28.5 | 316.3 | (37.2) | 314.4 | 1.9
Balance (in shares) at Dec. 31, 2018 |  | 18,125,201 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net Earnings (Loss) | 20.2 |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2019 |  | 18,192,486 |  |  |  |  |
Ending balance at Jun. 30, 2019 | 335.2 | $ 6.8 | 34.5 | 328.5 | (36.1) | 333.7 | 1.5
Beginning balance at Mar. 31, 2019 | 320.2 | $ 6.8 | 32.0 | 317.7 | (38.5) | 318.0 | 2.2
Balance (in shares) at Mar. 31, 2019 |  | 18,160,539 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net Earnings (Loss) | 14.8 | $ 0.0 | 0.0 | 14.8 | 0.0 | 14.8 | 0.0
Other Comprehensive (Loss) Income | 2.4 | $ 0.0 | 0.0 | 0.0 | 2.4 | 2.4 | 0.0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares) |  | 31,947 |  |  |  |  |
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) | 0.3 | $ 0.0 | 0.3 | 0.0 | 0.0 | 0.3 | 0.0
Share-Based Compensation | 1.7 | 0.0 | 1.7 | 0.0 | 0.0 | 1.7 | 0.0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share | (4.0) | 0.0 | 0.0 | (4.0) | 0.0 | (4.0) | 0.0
Recognition of Noncontrolling Interests | (0.3) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (0.3)
Other | 0.1 | $ 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1
Balance (in shares) at Jun. 30, 2019 |  | 18,192,486 |  |  |  |  |
Ending balance at Jun. 30, 2019 | 335.2 | $ 6.8 | 34.5 | 328.5 | (36.1) | 333.7 | 1.5
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests | 0.0 | 0.0 | 0.5 | 0.0 | 0.0 | 0.5 | (0.5)
Beginning balance at Dec. 31, 2019 | $ 361.3 | $ 6.9 | 45.5 | 346.0 | (38.5) | 359.9 | 1.4
Balance (in shares) at Dec. 31, 2019 | 18,336,010 | 18,336,010 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net Earnings (Loss) | $ 5.2 | $ 0.0 | 0.0 | 5.2 | 0.0 | 5.2 | 0.0
Other Comprehensive (Loss) Income | (7.6) | $ 0.0 | 0.0 | 0.0 | (7.6) | (7.6) | 0.0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares) |  | 98,805 |  |  |  |  |
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) | 1.1 | $ 0.0 | 1.1 | 0.0 | 0.0 | 1.1 | 0.0
Share-Based Compensation | 2.8 | 0.0 | 2.8 | 0.0 | 0.0 | 2.8 | 0.0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share | (4.0) | 0.0 | 0.0 | (4.0) | 0.0 | (4.0) | 0.0
Other | (0.1) | $ 0.0 | 0.0 | (0.1) | 0.0 | (0.1) | 0.0
Balance (in shares) at Mar. 31, 2020 |  | 18,434,815 |  |  |  |  |
Ending balance at Mar. 31, 2020 | 358.7 | $ 6.9 | 49.4 | 347.1 | (46.1) | 357.3 | 1.4
Beginning balance at Dec. 31, 2019 | $ 361.3 | $ 6.9 | 45.5 | 346.0 | (38.5) | 359.9 | 1.4
Balance (in shares) at Dec. 31, 2019 | 18,336,010 | 18,336,010 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net Earnings (Loss) | $ 19.5 |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2020 | 18,455,462 | 18,455,462 |  |  |  |  |
Ending balance at Jun. 30, 2020 | $ 373.1 | $ 6.9 | 49.4 | 357.4 | (42.0) | 371.7 | 1.4
Beginning balance at Mar. 31, 2020 | 358.7 | $ 6.9 | 49.4 | 347.1 | (46.1) | 357.3 | 1.4
Balance (in shares) at Mar. 31, 2020 |  | 18,434,815 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net Earnings (Loss) | 14.3 | $ 0.0 | 0.0 | 14.3 | 0.0 | 14.3 | 0.0
Other Comprehensive (Loss) Income | 4.1 | $ 0.0 | 0.0 | 0.0 | 4.1 | 4.1 | 0.0
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) (in shares) |  | 20,647 |  |  |  |  |
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings (6,952, 3,310, 1,560, 4,151, 3,360, and 1,327 shares) | 0.0 | $ 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0
Dividends paid ($0.22, $0.22, $0.22, $0.21,$0.21, and $0.21) per Common Share | $ (4.0) | $ 0.0 | 0.0 | (4.0) | 0.0 | (4.0) | 0.0
Balance (in shares) at Jun. 30, 2020 | 18,455,462 | 18,455,462 |  |  |  |  |
Ending balance at Jun. 30, 2020 | $ 373.1 | $ 6.9 | $ 49.4 | $ 357.4 | $ (42.0) | $ 371.7 | $ 1.4

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