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Intangible Assets | 12 Months Ended
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Mar. 31, 2019
Intangible Assets [Abstract] |
Intangible Assets |
Note 14: | Intangible Assets
Intangible assets consisted of the following:
|  | March 31, 2019 |  |  | March 31, 2018 |
|  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Intangible Assets |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Intangible Assets |
Customer relationships |  | $ | 61.5 |  |  | $ | (9.1 | ) |  | $ | 52.4 |  |  | $ | 64.2 |  |  | $ | (5.7 | ) |  | $ | 58.5 |
Trade names |  |  | 58.9 |  |  |  | (13.5 | ) |  |  | 45.4 |  |  |  | 60.6 |  |  |  | (10.8 | ) |  |  | 49.8 |
Acquired technology |  |  | 23.9 |  |  |  | (5.5 | ) |  |  | 18.4 |  |  |  | 25.2 |  |  |  | (3.6 | ) |  |  | 21.6 |
Total intangible assets |  | $ | 144.3 |  |  | $ | (28.1 | ) |  | $ | 116.2 |  |  | $ | 150.0 |  |  | $ | (20.1 | ) |  | $ | 129.9 |
The Company recorded $9.0 million, $9.7 million, and $4.1 million of amortization expense during fiscal 2019, 2018, and 2017, respectively. The Company estimates that it will record $9.0 million of amortization expense in fiscal 2020 and approximately $8.0 million of annual amortization expense in fiscal 2021 through 2024. During fiscal 2018, the BHVAC segment discontinued its geothermal product line and, as a result, recorded a $1.2 million impairment for acquired technology intangible assets it will no longer use. Annual revenue for this discontinued product line was less than $1.0 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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