Pension Schedule of Net Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Change in plan assets:
Fair value of plan assets at beginning of period	$ 20,510
Fair value of plan assets at end of period	24,608	$ 20,510
Pension Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of period	45,154	41,379
Service cost	484	445	$ 512
Interest cost	1,413	1,607	1,432
Actuarial loss (gain)	4,310	3,180
Net benefits paid	1,620	1,457
Other	0	0	0
Benefit obligation at end of period	49,741	45,154	41,379
Change in plan assets:
Fair value of plan assets at beginning of period	20,510	16,225
Actual return on plan assets	3,342	2,061
Employer contributions	2,376	3,681
Net benefits paid	(1,620)	(1,457)
Fair value of plan assets at end of period	24,608	20,510	16,225
Funded status at end of period	(25,133)	(24,644)
Other Postretirement Benefit Plan
Change in benefit obligation:
Benefit obligation at beginning of period	2,360	4,169
Service cost	40	42	72
Interest cost	60	81	140
Actuarial loss (gain)	(400)	(107)
Net benefits paid	18	4
Other	0	(1,829)	0
Benefit obligation at end of period	2,042	2,360	4,169
Change in plan assets:
Fair value of plan assets at beginning of period	0	0
Actual return on plan assets	0	0
Employer contributions	0	0
Net benefits paid	0	0
Fair value of plan assets at end of period	0	0	$ 0
Funded status at end of period	$ (2,042)	$ (2,360)