PENSION PLANS AND OTHER POST RETIREMENT BENEFITS - Schedule of the Change in Benefit Obligation (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation—beginning of fiscal year	$ 67,699	$ 67,226
Service cost	2,391	2,501	$ 2,138
Interest cost	1,347	1,338	1,164
Benefits paid	(2,052)	(1,846)
Actuarial (gain) loss	(11,241)	(4,947)
Foreign exchange (gain) loss	(7,853)	3,427
Benefit obligation—end of period	50,291	67,699	67,226
Less: Current portion	(1,907)	(1,980)
Non-current portion of benefit obligation	48,384	65,719
CDT
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation—beginning of fiscal year	32,865	32,851
Service cost	357	473	572
Interest cost	427	505	459
Benefits paid	(830)	(800)
Actuarial (gain) loss	(4,497)	(1,976)
Foreign exchange (gain) loss	(3,760)	1,812
Benefit obligation—end of period	24,562	32,865	32,851
Less: Current portion	(907)	(880)
Non-current portion of benefit obligation	23,655	31,985
GXS GER
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation—beginning of fiscal year	23,861	24,105
Service cost	165	206	319
Interest cost	304	364	337
Benefits paid	(969)	(1,027)
Actuarial (gain) loss	(4,718)	(1,118)
Foreign exchange (gain) loss	(2,716)	1,331
Benefit obligation—end of period	15,927	23,861	24,105
Less: Current portion	(915)	(1,058)
Non-current portion of benefit obligation	15,012	22,803
GXS PHP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation—beginning of fiscal year	10,973	10,270
Service cost	1,869	1,822	1,247
Interest cost	616	469	368
Benefits paid	(253)	(19)
Actuarial (gain) loss	(2,026)	(1,853)
Foreign exchange (gain) loss	(1,377)	284
Benefit obligation—end of period	9,802	10,973	$ 10,270
Less: Current portion	(85)	(42)
Non-current portion of benefit obligation	$ 9,717	$ 10,931