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Intangibles | 3 Months Ended
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Jul. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangibles | Intangibles The components of intangible assets were:
(in thousands) |  | Weighted Average Amortization Period |  | Amortization Method |  | Cost |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | 6 years |  | Straight-line |  | $ | 274,000 |  |  | $ | 26,639 |  |  | $ | 247,361 |
Trademarks |  | 3 years |  | Straight-line |  | 10,000 |  |  | 1,944 |  |  | 8,056 |
Intangible assets, net |  |  |  |  |  |  |  | $ | 28,583 |  |  | $ | 255,417 |
Amortization expense for the three-months ended July 31, 2018 was $12.3 million.

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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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