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Revenue Recognition
 12 Months Ended
Dec. 31, 2024
Revenue Recognition [Abstract]  
Revenue Recognition REVENUE RECOGNITION
Revenue is recognized when performance obligations under the terms of a contract with the customer are satisfied; generally this occurs at a point in time, with the transfer of control of the Company’s products or services to customers. For most of the Company’s product sales, these criteria are met at the time the product is shipped; however, occasionally control passes later or earlier than shipment due to customer contract or letter of credit terms. In circumstances where credit is extended, payment terms generally range from 30 to 120 days and customer deposits may be required.
Revenue is measured as the amount of consideration the Company expects to be entitled to in exchange for transferring products or providing services. Expected returns and allowances are estimated and recognized based primarily on an analysis of historical experience, with Net sales presented net of such returns and allowances.
Net sales include sales of products and billed freight related to product sales. Freight has not historically comprised a material component of Net sales. The Company has elected to account for such shipping and handling activities as a fulfillment cost and not as a separate performance obligation. Taxes collected from customers and remitted to governmental authorities are recorded on a net basis and are excluded from Net sales.
Information relating to the disaggregation of Net sales by geographic region, based on the location of the end-customer, is included in Note 17 – Segment Information. The following table presents the Company’s Net sales disaggregated by major product line:
For the Years Ended December 31,
(in millions of dollars)202420232022
Environmental Solutions
Vehicles and equipment (a)
$1,213.8 $1,120.9 $927.9 
Parts232.2 217.0 173.7 
Rental income (b)
61.7 55.2 53.1 
Other (c)
49.4 44.8 35.9 
Total net sales1,557.1 1,437.9 1,190.6 
Safety and Security Systems
Public safety and security equipment192.6 173.2 149.1 
Industrial signaling equipment69.4 71.9 62.1 
Warning systems42.4 39.7 33.0 
Total net sales304.4 284.8 244.2 
Total net sales$1,861.5 $1,722.7 $1,434.8 
(a)    Includes net sales from the sale of new and used vehicles and equipment, including sales of rental equipment.
(b)    Represents revenues from vehicle and equipment lease arrangements with customers, recognized in accordance with Topic 842.
(c)    Primarily includes revenues from services such as maintenance and repair work and the sale of extended warranty contracts.
Contract Balances
The Company recognizes contract liabilities when cash payments, such as customer deposits, are received in advance of the Company’s satisfaction of the related performance obligations. Contract liabilities are recognized as Net sales when the related performance obligations are satisfied, which generally occurs within three to six months of the cash receipt. Contract liability balances are not materially impacted by any other factors. The Company’s contract liabilities were $38.8 million as of December 31, 2024 and $30.9 million as of December 31, 2023. Contract assets, such as unbilled receivables, were not significant as of any of the periods presented herein.
Practical Expedients
As the Company’s standard payment terms are less than a year, the Company has elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component.
The Company has also elected the practical expedient under ASC 340-40-25-4 and recognizes the incremental costs of obtaining a contract, such as sales commissions, as expense when incurred as the amortization period of the asset that otherwise would have been recognized is one year or less.
Further, as permitted by ASC 606-10-50-14, the Company does not disclose the value of its remaining performance obligations for contracts with an original expected duration of one year or less.