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Related Party Transactions (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018 | May 18, 2020
Chairman of the Board of Directors |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party expenses incurred |  | $ 0.8 | $ 1.2 |
Director |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party expenses incurred | $ 1.6 | 2.4 | 4.4 |
Related party, ownership percentage of entity | 100.00% |  |  |
Related party transaction, amounts paid |  |  | 0.1 |
Equity Method Investees |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party expenses incurred | $ 13.8 | 32.2 | 22.0 |
Atom Tickets | Equity Method Investees |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Investment in equity method investees |  |  | $ 10.0 |
Class A Voting Common Shares | Subsequent Event | Chairman of the Board of Directors |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of common stock outstanding held by MHR Fund Management |  |  |  | 23.00%
Class B Non-Voting Common Shares | Subsequent Event | Chairman of the Board of Directors |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of common stock outstanding held by MHR Fund Management |  |  |  | 11.00%
Maximum | Chairman of the Board of Directors |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party expenses incurred | 0.1 |  |  |
Maximum | Director |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, amounts paid | $ 0.0 | $ 0.1 |  |

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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 + Details
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