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Intangible Assets
 3 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets 
Intangible assets consisted of the following as of September 30, 2022 and June 30, 2022:
Developed TechnologyTrademarksCustomer Relationships and BacklogCapitalized Software and OtherTotal
(Dollars in Thousands)
September 30, 2022:
Gross carrying amount$1,902,575 $464,400 $3,081,579 $10,149 $5,458,703 
Less: Accumulated amortization(201,017)(10,489)(216,733)(8,555)(436,794)
Net carrying amount$1,701,558 $453,911 $2,864,846 $1,594 $5,021,909 
June 30, 2022:
Gross carrying amount$1,882,037 $464,400 $3,072,738 $10,149 $5,429,324 
Less: Accumulated amortization(153,758)(9,379)(144,888)(8,518)(316,543)
Net carrying amount$1,728,279 $455,021 $2,927,850 $1,631 $5,112,781 
The increase in intangible assets from June 30, 2022 was primarily due to the Inmation acquisition. See Note 4, Acquisitions. Total intangible asset amortization expense was $121.2 million, of which $97.9 million related to the Heritage AspenTech acquisition, and $28.8 million during the three months ended September 30, 2022 and 2021, respectively.