EMPLOYEE BENEFIT AND RETIREMENT PLANS - Status of Defined Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Change in benefit obligation
Benefit obligation at beginning of year	$ 110,600
Benefit obligation at end of year	109,500	$ 110,600
Change in plan assets
Actual return on plan assets	2,700
Employer contributions	2,400
Benefits paid	(7,200)
Components of net periodic benefit cost
Net periodic benefit cost	9,900	$ 1,400
UNITED STATES
Change in benefit obligation
Interest cost	1,800
Components of net periodic benefit cost
Interest cost	1,800
Net periodic benefit cost	$ 1,200
UNITED KINGDOM
Weighted average assumptions – net periodic benefit cost
Discount rate	5.14%	3.82%
Components of net periodic benefit cost
Net periodic benefit cost	$ 200
Pension Plan
Change in benefit obligation
Benefit obligation at beginning of year	134,303	$ 172,617
Interest cost	5,820	4,113
Exchange rate changes	1,075	(4,985)
Benefits paid	(7,151)	(6,941)
Actuarial (gain) loss	(11,499)	(30,501)
Benefit obligation at end of year	122,548	134,303
Change in plan assets
Actual return on plan assets	2,701	(15,941)
Employer contributions	2,449	2,517
Benefits paid	(7,151)	(6,941)
Exchange rate changes	907	(4,213)
Funded status at end of year	(13,028)	(23,689)
Amounts recognized in balance sheet
Current liability	(2,076)	(1,157)
Non-current liability	(10,952)	(22,532)
Net amount recognized in balance sheet	13,028	23,689
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
Accumulated loss	6,520	6,883
Amounts not yet recognized as a component of net periodic benefit cost	6,520	6,883
Accumulated net periodic benefit cost in excess of contributions	(19,548)	(30,572)
Net amount recognized in balance sheet	(13,028)	(23,689)
Components of net periodic benefit cost
Interest cost	5,820	4,113
Expected return on plan assets	(4,023)	(4,378)
Recognized actuarial loss	(10,451)	57
Net periodic benefit cost	(8,654)	(208)
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
Net loss	(40)	(57)
Information for pension plans with accumulated benefits in excess of plan assets
Projected benefit obligation	122,548	134,303
Accumulated benefit obligation	122,548	134,303
Fair value of assets	109,520	110,614
Pension Plan | UNITED STATES
Change in benefit obligation
Benefit obligation at beginning of year	100,580	124,633
Interest cost	4,571	3,274
Benefits paid	(5,577)	(5,191)
Actuarial (gain) loss	(4,585)	(22,136)
Benefit obligation at end of year	$ 94,989	$ 100,580
Weighted average assumptions - benefit obligation
Discount rate	5.34%	4.77%
Change in plan assets
Actual return on plan assets	$ 8,641	$ (10,633)
Employer contributions	1,543	1,523
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Benefits paid	(5,577)	(5,191)
Funded status at end of year	(8,835)	(19,033)
Amounts recognized in balance sheet
Current liability	(2,076)	(1,157)
Non-current liability	(6,759)	(17,876)
Net amount recognized in balance sheet	$ 8,835	$ 19,033
Weighted average assumptions – net periodic benefit cost
Discount rate	4.77%	2.69%
Return on plan assets	3.56%	3.56%
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
Accumulated loss	$ 8,629	$ 8,650
Amounts not yet recognized as a component of net periodic benefit cost	8,629	8,650
Accumulated net periodic benefit cost in excess of contributions	(17,464)	(27,683)
Net amount recognized in balance sheet	(8,835)	(19,033)
Components of net periodic benefit cost
Interest cost	4,571	3,274
Expected return on plan assets	(2,796)	(3,374)
Settlement (gain) recognized	0	0
Recognized actuarial loss	(10,451)	57
Net periodic benefit cost	(8,676)	(43)
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
Net loss	(40)	(57)
Information for pension plans with accumulated benefits in excess of plan assets
Projected benefit obligation	94,989	100,580
Accumulated benefit obligation	94,989	100,580
Fair value of assets	86,154	81,547
Pension Plan | UNITED KINGDOM
Change in benefit obligation
Benefit obligation at beginning of year	33,723	47,984
Interest cost	1,249	839
Exchange rate changes	1,075	(4,985)
Benefits paid	(1,574)	(1,750)
Actuarial (gain) loss	(6,914)	(8,365)
Benefit obligation at end of year	$ 27,559	$ 33,723
Weighted average assumptions - benefit obligation
Discount rate	5.14%	3.82%
Change in plan assets
Actual return on plan assets	$ (5,940)	$ (5,308)
Employer contributions	906	994
Benefits paid	(1,574)	(1,750)
Exchange rate changes	907	(4,212)
Funded status at end of year	(4,192)	(4,655)
Amounts recognized in balance sheet
Non-current liability	(4,192)	(4,655)
Net amount recognized in balance sheet	$ 4,192	$ 4,655
Weighted average assumptions – net periodic benefit cost
Discount rate	3.82%	1.86%
Return on plan assets	4.30%	2.69%
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
Accumulated loss	$ (2,109)	$ (1,766)
Amounts not yet recognized as a component of net periodic benefit cost	(2,109)	(1,766)
Accumulated net periodic benefit cost in excess of contributions	(2,083)	(2,889)
Net amount recognized in balance sheet	(4,192)	(4,655)
Components of net periodic benefit cost
Interest cost	1,249	839
Expected return on plan assets	(1,227)	(1,004)
Amortization of accumulated loss	0	0
Net periodic benefit cost	22	(165)
Information for pension plans with accumulated benefits in excess of plan assets
Projected benefit obligation	27,559	33,723
Accumulated benefit obligation	27,559	33,723
Fair value of assets	23,367	29,068
Pension Plan | Change in Plan Assets
Change in plan assets
Fair value of plan assets at beginning of year	110,614	135,192
Fair value of plan assets at end of year	109,520	110,614
Pension Plan | Change in Plan Assets | UNITED STATES
Change in plan assets
Fair value of plan assets at beginning of year	81,547	95,848
Fair value of plan assets at end of year	86,154	81,547
Pension Plan | Change in Plan Assets | UNITED KINGDOM
Change in plan assets
Fair value of plan assets at beginning of year	29,068
Fair value of plan assets at end of year	23,367	29,068
Pension Plan | Debt Security, Corporate, US | UNITED KINGDOM
Change in plan assets
Fair value of plan assets at beginning of year	$ 29,068	39,344
Fair value of plan assets at end of year		$ 29,068