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EMPLOYEE BENEFIT PLANS - Schedule of Defined Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Change in projected benefit obligation: |  |  |
Projected benefit obligation as of the beginning of the fiscal year | $ 115,490 | $ 96,682 |
Service cost | 4,823 | 4,220 | $ 4,127
Interest cost | 1,084 | 1,132 |
Contributions by plan participants | 78 | 69 |
Actuarial (gain) loss | (496) | 4,187 |
Benefit payments | (3,119) | (1,755) |
Assumed benefit obligation from acquisition | 0 | 11,095 |
Foreign currency exchange rate changes and others, net | 2,010 | (140) |
Projected benefit obligation as of the end of the fiscal year | 119,870 | 115,490 | 96,682
Change in fair value of plan assets: |  |  |
Fair value of plan assets as of the beginning of the fiscal year | 33,555 | 27,932 |
Actual return on plan assets | 1,264 | 854 |
Employer contributions | 5,271 | 3,587 |
Benefit and expense payments | (3,115) | (1,752) |
Assumed plan assets from acquisition | 0 | 3,424 |
Foreign currency exchange rate changes and others, net | 953 | (490) |
Fair value of plan assets as of the end of the fiscal year | 37,928 | 33,555 | $ 27,932
Funded status |  |  |
Underfunded status | 81,942 | 81,935 |
Plans with accumulated benefit obligations in excess of plan assets: |  |  |
Accumulated benefit obligation | 75,550 | 72,508 |
Projected benefit obligation | 119,870 | 115,490 |
Plan assets at fair value | $ 37,928 | $ 33,555 |

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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