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BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-Current Assets Held for Sale (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
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Dec. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018 | Mar. 31, 2019
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Term of contract |  |  |  |  | 10 years
Non-current assets held for sale |  | $ 0 | $ 5,276 |  |
Proceeds from sale of company headquarters | $ 9,000 | 8,996 | 0 | $ 0 |
Gain from sale of company headquarters, net | $ 2,500 | $ (2,513) | 0 | $ 0 |
Minimum |  |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Term of contract |  | 1 year |  |  |
Maximum |  |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Term of contract |  | 20 years |  |  |
Land |  |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Non-current assets held for sale |  |  | 1,700 |  |
Buildings |  |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Non-current assets held for sale |  |  | $ 3,600 |  |

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- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 15 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=77912953&loc=d3e400-110220 + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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