CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions | Total | Tennant Company Shareholders' Equity | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Noncontrolling Interest |
Beginning balance (in shares) at Dec. 31, 2021 | | | 18,535,116 | | | | |
Beginning balance at Dec. 31, 2021 | $ 435.1 | $ 433.8 | $ 7 | $ 54.1 | $ 410.6 | $ (37.9) | $ 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 10.3 | 10.3 | | | 10.3 | | |
Other comprehensive income (loss) | (4) | (4) | | | | (4) | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases (in shares) | | | 44,700 | | | | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of shares | (1.3) | (1.3) | | (1.3) | | | |
Share-based compensation | 1.8 | 1.8 | | 1.8 | | | |
Dividends paid per common share | (4.6) | (4.6) | | | (4.6) | | |
Ending balance (in shares) at Mar. 31, 2022 | | | 18,579,816 | | | | |
Ending balance at Mar. 31, 2022 | 437.3 | 436 | $ 7 | 54.6 | 416.3 | (41.9) | 1.3 |
Beginning balance (in shares) at Dec. 31, 2021 | | | 18,535,116 | | | | |
Beginning balance at Dec. 31, 2021 | 435.1 | 433.8 | $ 7 | 54.1 | 410.6 | (37.9) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 42.5 | | | | | | |
Ending balance (in shares) at Sep. 30, 2022 | | | 18,596,389 | | | | |
Ending balance at Sep. 30, 2022 | 426.5 | 425.2 | $ 7 | 57.3 | 439.1 | (78.2) | 1.3 |
Beginning balance (in shares) at Mar. 31, 2022 | | | 18,579,816 | | | | |
Beginning balance at Mar. 31, 2022 | 437.3 | 436 | $ 7 | 54.6 | 416.3 | (41.9) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 16.6 | 16.6 | | | 16.6 | | |
Other comprehensive income (loss) | (16.1) | (16.1) | | | | (16.1) | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases (in shares) | | | 9,859 | | | | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of shares | (0.1) | (0.1) | | (0.1) | | | |
Share-based compensation | 0.9 | 0.9 | | 0.9 | | | |
Dividends paid per common share | (4.6) | (4.6) | | | (4.6) | | |
Ending balance (in shares) at Jun. 30, 2022 | | | 18,589,675 | | | | |
Ending balance at Jun. 30, 2022 | 434 | 432.7 | $ 7 | 55.4 | 428.3 | (58) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 15.6 | 15.6 | | | 15.6 | | |
Other comprehensive income (loss) | (20.2) | (20.2) | | | | (20.2) | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases (in shares) | | | 6,714 | | | | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of shares | 0.2 | 0.2 | | 0.2 | | | |
Share-based compensation | 1.7 | 1.7 | | 1.7 | | | |
Dividends paid per common share | (4.8) | (4.8) | | | (4.8) | | |
Ending balance (in shares) at Sep. 30, 2022 | | | 18,596,389 | | | | |
Ending balance at Sep. 30, 2022 | $ 426.5 | 425.2 | $ 7 | 57.3 | 439.1 | (78.2) | 1.3 |
Beginning balance (in shares) at Dec. 31, 2022 | 18,521,485 | | 18,521,485 | | | | |
Beginning balance at Dec. 31, 2022 | $ 472.1 | 470.8 | $ 7 | 56 | 458 | (50.2) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 24.3 | 24.3 | | | 24.3 | | |
Other comprehensive income (loss) | 4.7 | 4.7 | | | | 4.7 | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases (in shares) | | | 93,073 | | | | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of shares | 0.8 | 0.8 | | 0.8 | | | |
Share-based compensation | 1.2 | 1.2 | | 1.2 | | | |
Repurchases of common stock (in shares) | | | (73,525) | | | | |
Repurchases of common stock | (5) | (5) | | (5) | | | |
Dividends paid per common share | (4.9) | (4.9) | | | (4.9) | | |
Ending balance (in shares) at Mar. 31, 2023 | | | 18,541,033 | | | | |
Ending balance at Mar. 31, 2023 | $ 493.2 | 491.9 | $ 7 | 53 | 477.4 | (45.5) | 1.3 |
Beginning balance (in shares) at Dec. 31, 2022 | 18,521,485 | | 18,521,485 | | | | |
Beginning balance at Dec. 31, 2022 | $ 472.1 | 470.8 | $ 7 | 56 | 458 | (50.2) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | $ 78.5 | | | | | | |
Ending balance (in shares) at Sep. 30, 2023 | 18,521,485 | | 18,741,371 | | | | |
Ending balance at Sep. 30, 2023 | $ 546.3 | 545 | $ 7 | 71 | 521.7 | (54.7) | 1.3 |
Beginning balance (in shares) at Mar. 31, 2023 | | | 18,541,033 | | | | |
Beginning balance at Mar. 31, 2023 | 493.2 | 491.9 | $ 7 | 53 | 477.4 | (45.5) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 31.3 | 31.3 | | | 31.3 | | |
Other comprehensive income (loss) | 1.2 | 1.2 | | | | 1.2 | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases (in shares) | | | 69,345 | | | | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of shares | 3.4 | 3.4 | | 3.4 | | | |
Share-based compensation | 2.7 | 2.7 | | 2.7 | | | |
Repurchases of common stock (in shares) | | | (69,780) | | | | |
Repurchases of common stock | (5) | (5) | | (5) | | | |
Dividends paid per common share | (4.9) | (4.9) | | | (4.9) | | |
Ending balance (in shares) at Jun. 30, 2023 | | | 18,540,598 | | | | |
Ending balance at Jun. 30, 2023 | 521.9 | 520.6 | $ 7 | 54.1 | 503.8 | (44.3) | 1.3 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | |
Net income | 22.9 | 22.9 | | | 22.9 | | |
Other comprehensive income (loss) | (10.4) | (10.4) | | | | (10.4) | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases (in shares) | | | 222,566 | | | | |
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of shares | 13.9 | 13.9 | | 13.9 | | | |
Share-based compensation | 4.7 | 4.7 | | 4.7 | | | |
Repurchases of common stock (in shares) | | | (21,793) | | | | |
Repurchases of common stock | (1.7) | (1.7) | | (1.7) | | | |
Dividends paid per common share | $ (5) | (5) | | | (5) | | |
Ending balance (in shares) at Sep. 30, 2023 | 18,521,485 | | 18,741,371 | | | | |
Ending balance at Sep. 30, 2023 | $ 546.3 | $ 545 | $ 7 | $ 71 | $ 521.7 | $ (54.7) | $ 1.3 |