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Revenue Recognition (Notes)
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Revenue from Contract with Customer [Text Block] REVENUE
The Company disaggregates revenue from contracts with customers by product, service, timing of revenue recognition, and geography. A summary by the Company’s reportable segments follows:
Three months ended March 31, 2025U.S. OperationsSwiss OperationsWestern European OperationsChinese OperationsOther OperationsTotal
Product Revenue$247,067 $36,298 $124,850 $128,197 $113,538 $649,950 
Service Revenue:
Point in time
73,330 8,248 42,476 8,822 29,915 162,791 
Over time
25,361 2,756 23,043 4,149 15,694 71,003 
Total$345,758 $47,302 $190,369 $141,168 $159,147 $883,744 
Three months ended March 31, 2024U.S. OperationsSwiss OperationsWestern European OperationsChinese OperationsOther OperationsTotal
Product Revenue$250,737 $43,621 $151,535 $129,011 $126,064 $700,968 
Service Revenue:
Point in time
73,133 7,765 42,821 9,901 31,210 164,830 
Over time
22,253 2,865 20,409 4,286 10,338 60,151 
Total$346,123 $54,251 $214,765 $143,198 $167,612 $925,949 
A breakdown of net sales to external customers by geographic customer destination for the three months ended March 31 follows:
20252024
Americas$377,916 $384,342 
Europe247,975 273,861 
Asia / Rest of World257,853 267,746 
Total$883,744 $925,949 
The Company's global revenue mix by product category is laboratory (56% of sales), industrial (39% of sales) and retail (5% of sales). The Company's product revenue by reportable segment is proportionately similar to the Company's global revenue mix except the Company's Swiss Operations is largely comprised of laboratory products, while the Company's Chinese Operations has a slightly higher percentage of industrial products. A breakdown of the Company’s sales by product category for the three months ended March 31 follows:
20252024
Laboratory$500,224 $525,056 
Industrial341,200 351,845 
Retail42,320 49,048 
Total$883,744 $925,949 
The payment terms in the Company’s contracts with customers do not exceed one year and therefore contracts do not contain a significant financing component. In most cases, after appropriate credit evaluations, payments are due in arrears and are recognized as receivables. Unbilled revenue is recorded when performance obligations have been satisfied, but not yet billed to the customer. Unbilled revenue as of March 31, 2025 and December 31, 2024 was $34.6 million and $32.6 million, respectively, and is included within accounts receivable. Deferred revenue and customer prepayments are recorded when cash payments are received or due in advance of the performance obligation being satisfied. Deferred revenue primarily includes prepaid service contracts, as well as deferred installation.
Changes in the components of deferred revenue and customer prepayments during the periods ended March 31, 2025 and 2024 are as follows:
20252024
Beginning balances as of January 1$204,166 $202,022 
Customer pre-payments/deferred revenue193,148 188,295 
Revenue recognized(167,672)(169,663)
Foreign currency translation3,191 (3,995)
Ending balance as of March 31$232,833 $216,659 
The Company generally expenses sales commissions when incurred because the contract period is one year or less. These costs are recorded within selling, general, and administrative expenses. The value of unsatisfied performance obligations other than customer prepayments and deferred revenue associated with contracts greater than one year is immaterial.