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Intangible Assets and Trademarks
 12 Months Ended
Apr. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Trademarks Intangible Assets and Trademarks
 
The components of customer relationships intangibles were:
 APRIL 30
(in thousands)20212020
Customer relationship intangibles$274,000 $274,000 
Less accumulated amortization(152,222)(106,556)
Total$121,778 $167,444 
The components of trademarks were:
 APRIL 30
(in thousands)20212020
Trademarks$10,000 $10,000 
Less accumulated amortization(10,000)(7,778)
Total$— $2,222 

Customer relationship intangibles and trademarks are amortized over the estimated useful lives on a straight-line basis over six and three years, respectively. Amortization expense on customer relationship intangibles and trademarks amounted to $47.9 million and $49.0 million for each of the years ended April 30, 2021 and 2020, respectively.