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VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - Loss on Sale of Subsidiaries Narrative (Details) $ in Thousands, £ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 10, 2019 GBP (£) | Jun. 30, 2019 USD ($) | Apr. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 affiliate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Loss on sale of subsidiaries |  |  |  | $ 0 | $ 56,303 |
Eastern Airways |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Consideration paid | £ | £ 17.1 |  |  |  |  |
Non solicitation of key employees period | 12 months |  |  |  |  |
Right to appoint observer to board of directors period | 12 months |  |  |  |  |
Transition services coverage period | 12 months |  |  |  |  |
Loss on sale of subsidiaries |  |  |  |  | 46,852 |
Write off of net assets |  |  |  |  | 35,000 |
Write off of cumulative translation adjustment |  |  |  |  | 11,900 |
Aviashelf Aviation Co. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from divestiture of businesses |  | $ 2,600 |  |  |  |
Bristow Helicopters Leasing Limited And Sakhalin Bristow Air Services Ltd |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from divestiture of businesses |  |  | $ 1,400 |  |  |
Aviashelf and Bristow Helicopters Leasing Limited |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Loss on sale of subsidiaries |  |  |  |  | 9,451 |
Write off of net assets |  |  |  |  | 2,300 |
Write off of cumulative translation adjustment |  |  |  |  | $ 7,200 |
Aviashelf Aviation Co. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Noncontrolling ownership percentage |  |  |  |  |  | 48.50%
Option to acquire additional interest in afiliate |  |  |  |  |  | 8.50%
Bristow Helicopters Leasing Limited And Sakhalin Bristow Air Services Ltd |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Noncontrolling ownership percentage |  |  |  |  |  | 60.00%
Number of joint ventures | affiliate |  |  |  |  |  | 2

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- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
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