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STOCK COMPENSATION PLANS AND STOCK-BASED COMPENSATION - Employee Stock Purchase Plan (Details) - USD ($)
$ / shares in Units, shares in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Purchase rights granted [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Dividend yield 0.00% 0.00% 0.00%
Expected volatility 32.10% 29.90% 37.20%
Risk-free interest rate 5.11% 4.50% 1.71%
Expected term (in years) 6 months 6 months 6 months
Weighted average fair value of options granted $ 65.50 $ 50.95 $ 43.41
Employee stock purchase plans [Member]      
Shares of Common Stock Issued under Employee Stock Purchase Plan [Abstract]      
Cadence shares purchased under the ESPP 548 647 703
Cash received for the purchase of shares under the ESPP $ 115,335,000 $ 102,017,000 $ 89,314,000
Weighted average purchase price per share $ 210.31 $ 157.70 $ 127.12
Purchase Period for Common Stock 6 months    
Percentage of Lower of Fair Market Value at Beginning or End of Applicable Offering Period Used for Calculating Price of Common Stock to be Purchased by Employees 85.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 15.00%    
Maximum Amount for which Common Stock can be Purchased by Employees in any Calendar Year $ 25,000    
Additional shares authorized and available for issuance under equity incentive plan 3,500    
Shares available for future issuance 6,200