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Intangibles | 3 Months Ended
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Jul. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangibles | Intangibles The components of customer relationship intangibles were:
|  | July 31, |  | April 30,
(in thousands) |  | 2019 |  | 2019
Customer relationship intangibles |  | $ | 274,000 |  |  | $ | 274,000 |
Less accumulated amortization |  | (72,306 | ) |  | (60,889 | )
Total |  | $ | 201,694 |  |  | $ | 213,111 |
The components of trademarks were:
|  | July 31, |  | April 30,
(in thousands) |  | 2019 |  | 2019
Trademarks |  | $ | 10,000 |  |  | $ | 10,000 |
Less accumulated amortization |  | (5,278 | ) |  | (4,445 | )
Total |  | $ | 4,722 |  |  | $ | 5,555 |
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 for the three-months ended July 31, 2019 and 2018 was $12.3 million and $12.3 million, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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