EMPLOYEE BENEFIT AND RETIREMENT PLANS - Status of the Postretirement Medical and Life Insurance Benefit Plan (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jan. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Change in benefit obligation
Benefit obligation at beginning of year			$ 37,400
Service cost	$ 15	$ 50
Interest cost	21	$ 120
Actuarial (gain) loss			(200)
Benefit obligation at end of year	$ 37,400		$ 23,700	$ 37,400
Weighted average assumptions - benefit obligation
Discount rate	2.69%	2.57%	4.77%	2.69%	2.73%
Components of net periodic benefit cost
Service cost	$ 15	$ 50
Interest cost	21	120
Amortization of prior service (credit)	(614)	(313)
Amortization of net loss	97	97
Total expense	(481)	(46)
Other Postretirement Benefits Plan
Change in benefit obligation
Benefit obligation at beginning of year		$ 7,705	$ 1,890	$ 7,705	$ 6,930
Service cost			36	65	73
Interest cost			49	141	240
Plan amendments			0	(5,585)	0
Benefits paid			(95)	(206)	(329)
Actuarial (gain) loss			(366)	(230)	791
Benefit obligation at end of year	$ 1,890		$ 1,514	$ 1,890	$ 7,705
Weighted average assumptions - benefit obligation
Discount rate	2.69%		4.77%	2.69%	2.73%
Rate of compensation increase					2.64%
Change in plan assets
Employer contributions			$ 95	$ 206	$ 329
Benefits paid			(95)	(206)	(329)
Fair value of plan assets at end of year	$ 0		0	0	0
Amounts recognized in balance sheet
Current liability	(107)		(108)	(107)	(358)
Non-current liability	(1,783)		(1,406)	(1,783)	(7,347)
Net amount recognized in balance sheet	1,890		$ 1,514	$ 1,890	$ 7,705
Weighted average assumptions – net periodic benefit cost
Discount rate			2.69%	2.73%	3.56%
Rate of compensation increase					2.64%
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
Prior service credit	6,898		$ 5,424	$ 6,898	$ 2,240
Unrecognized (gain) loss	(1,736)		(1,181)	(1,736)	(2,160)
Amounts not yet recognized as a component of net periodic benefit cost	5,162		4,243	5,162	80
Accumulated net periodic benefit cost in excess of contributions	(7,052)		(5,757)	(7,052)	(7,785)
Net amount recognized	(1,890)		(1,514)	(1,890)	(7,705)
Components of net periodic benefit cost
Service cost			36	65	73
Interest cost			49	141	240
Amortization of prior service (credit)			(1,474)	(927)	(537)
Amortization of net loss			189	194	83
Total expense			(1,200)	(527)	(141)
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
Prior service credit	(1,474)		(1,474)	(1,474)	537
Net loss	189		189	189	(166)
Total expected amortization, next fiscal year	$ (1,285)		$ (1,285)	$ (1,285)	$ 371