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PENSION AND RETIREMENT PLANS LIABILITIES - SERP (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Unamortized net loss |  | $ 23,000 |  |  | $ 23,000 |
Expected return on plan assets | 0.00% |  |  |  |  |
Unrealized gain/loss due to change in fair value of SERP liabilities |  | (195) |  | $ (153) | (390) | $ (306)
Minimum |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Cash contribution |  |  | $ 7,000 |  |  |
Maximum |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Cash contribution |  |  | 8,000 |  |  |
Non-qualified Supplemental Retirement Plan ("SERP") |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | 27,600 | 31,700 |  | 27,600 |
Trading gains (losses), net |  | (2,600) |  | 1,600 | (4,100) | 2,100
SERP Liabilities |  | 24,200 | $ 29,700 |  | 24,200 |
Unrealized gain/loss due to change in fair value of SERP liabilities |  | $ (2,500) |  | $ 586 | $ (3,900) | $ 2,300

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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + 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 (k)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920 + Details
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