Commitments and Contingencies	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the ordinary course of business, we are subject to the effects of certain contractual stipulations, events, transactions, and laws and regulations that may, at times, require the recognition of liabilities, such as those related to self-insurance estimated liabilities and claims, legal and contractual issues, environmental laws and regulations, guarantees, and indemnities. We establish estimated liabilities when the associated costs related to uncertainties or guarantees become probable and can be reasonably estimated. Oxygenator Water Techs vs. Tennant Company The Company is a defendant in an intellectual property litigation matter with Oxygenator Water Technologies, Inc. (OWT) in the United States District Court for the District of Minnesota. In November 2024, a jury returned a verdict against the Company, and in September 2025, the Court issued a post‑trial ruling enhancing damages. As of December 31, 2025 the Company has recorded a total accrued liability of approximately $20.5 million related to this matter. In the three and six months ended June 30, 2026, the Company recorded an incremental accrued expense and corresponding liability of $0.2 million and $0.4 million, respectively, based on updated estimates of interest costs. The Company and OWT have appealed certain aspects of the Court’s decisions. To stay execution of the judgment pending appeal, the Company has obtained a supersedeas bond in the amount of $20.3 million. The bond was issued by a third‑party surety, and no cash collateral has been posted. While the ultimate resolution of this matter is uncertain, management believes it has appropriately accrued for its current estimate of probable loss. The ruling does not restrict the Company’s ability to sell its products and is not expected to impact its long‑term business objectives. Other Matters Except as described above, there have been no material changes in the Company’s estimated liabilities for self-insurance, litigation, environmental matters, guarantees, or indemnities, or in the related events and circumstances.

Commitments and Contingencies

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

In the ordinary course of business, we are subject to the effects of certain contractual stipulations, events, transactions, and laws and regulations that may, at times, require the recognition of liabilities, such as those related to self-insurance estimated liabilities and claims, legal and contractual issues, environmental laws and regulations, guarantees, and indemnities. We establish estimated liabilities when the associated costs related to uncertainties or guarantees become probable and can be reasonably estimated.

Oxygenator Water Techs vs. Tennant Company

The Company is a defendant in an intellectual property litigation matter with Oxygenator Water Technologies, Inc. (OWT) in the United States District Court for the District of Minnesota. In November 2024, a jury returned a verdict against the Company, and in September 2025, the Court issued a post‑trial ruling enhancing damages. As of December 31, 2025 the Company has recorded a total accrued liability of approximately $20.5 million related to this matter.

In the three and six months ended June 30, 2026, the Company recorded an incremental accrued expense and corresponding liability of $0.2 million and $0.4 million, respectively, based on updated estimates of interest costs.

The Company and OWT have appealed certain aspects of the Court’s decisions. To stay execution of the judgment pending appeal, the Company has obtained a supersedeas bond in the amount of $20.3 million. The bond was issued by a third‑party surety, and no cash collateral has been posted.

While the ultimate resolution of this matter is uncertain, management believes it has appropriately accrued for its current estimate of probable loss. The ruling does not restrict the Company’s ability to sell its products and is not expected to impact its long‑term business objectives.

Other Matters

Except as described above, there have been no material changes in the Company’s estimated liabilities for self-insurance, litigation, environmental matters, guarantees, or indemnities, or in the related events and circumstances.