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Goodwill and Other Intangible Assets Schedule of Changes in Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Goodwill, Gross | $ 143,765 | $ 143,765 | $ 143,765
Accumulated Impairment | (129,775) | (129,775) | (15,831)
Changes related to acquisitions, impairments and other adjustments | 0 | (113,944) | 0
Goodwill, Net | $ 13,990 | $ 13,990 | $ 127,934

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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