Postretirement and Other Employee Benefits - Schedule of PBO, Change in Plan Assets, Funded Status and Amounts Recognized in Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Change in benefit obligation:
Projected benefit obligation at beginning of year	$ 56,908	$ 51,368
Service cost	2,955	2,532
Interest cost	226	456
Actuarial (gain) loss	(2,374)	4,124
Plan participant contributions	905	880
Benefits paid, net of transfers into plan	(222)	(215)
Settlement	(5,500)	(3,060)
Effect of foreign currency exchange rate changes	1,677	823
Projected benefit obligation at end of year	54,575	56,908
Change in plan assets:
Fair value of plan assets at beginning of year	37,306	36,929
Actual return on plan assets	(1,181)	339
Employer contribution	1,899	1,870
Plan participant contributions	905	880
Benefits paid, net of transfers into plan	(222)	(215)
Settlement	(5,500)	(3,060)
Effect of foreign currency exchange rate changes	1,109	563
Fair value of plan assets at end of year	34,316	37,306
Pension liability at end of fiscal year	(20,259)	(19,602)
Accumulated other comprehensive loss consists of the following:
Net prior service credit	2,642	2,877
Net actuarial loss	(10,436)	(11,586)
Accumulated other comprehensive loss, before income tax	$ (7,794)	$ (8,709)