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GOODWILL AND ACQUIRED INTANGIBLES
 3 Months Ended
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND ACQUIRED INTANGIBLES GOODWILL AND ACQUIRED INTANGIBLES
Goodwill
The changes in the carrying amount of goodwill during the three months ended March 31, 2024 were as follows:
 Gross Carrying
Amount
 (In thousands)
Balance as of December 31, 2023$1,535,845 
Goodwill resulting from acquisitions42,480 
Effect of foreign currency translation(3,218)
Balance as of March 31, 2024$1,575,107 
Acquired Intangibles, Net
Acquired intangibles as of March 31, 2024 were as follows:
Gross Carrying
Amount		Accumulated
Amortization		Acquired
Intangibles, Net
 (In thousands)
Existing technology$329,816 $(150,929)$178,887 
Agreements and relationships203,417 (56,766)146,651 
Tradenames, trademarks and patents13,899 (4,793)9,106 
Total acquired intangibles$547,132 $(212,488)$334,644 
During the three months ended March 31, 2024, Cadence completed certain projects previously included in in-process technology and transferred $6.8 million to existing technology.
Acquired intangibles as of December 31, 2023 were as follows:
Gross Carrying
Amount		Accumulated
Amortization		Acquired
Intangibles, Net
 (In thousands)
Existing technology$325,710 $(141,659)$184,051 
Agreements and relationships198,259 (61,395)136,864 
Tradenames, trademarks and patents13,460 (4,332)9,128 
Total acquired intangibles with definite lives$537,429 $(207,386)$330,043 
In-process technology6,800 — 6,800 
Total acquired intangibles$544,229 $(207,386)$336,843 
Amortization expense from existing technology and maintenance agreements is included in cost of product and maintenance. Amortization expense for the three months ended March 31, 2024 and March 31, 2023 by condensed consolidated income statement caption was as follows:
 Three Months Ended
 March 31,
2024		March 31,
2023
 (In thousands)
Cost of product and maintenance$11,348 $10,260 
Amortization of acquired intangibles5,407 4,267 
Total amortization of acquired intangibles$16,755 $14,527 
As of March 31, 2024, the estimated amortization expense for intangible assets with definite lives was as follows for the following five fiscal years and thereafter:
 (In thousands)
2024 - remaining period$50,873 
202554,698 
202649,102 
202746,595 
202842,441 
202927,957 
Thereafter62,978 
Total estimated amortization expense$334,644