Pension Schedule of Changes in Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	$ 24,608	$ 20,510
Level I [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	184	8,230
Level II [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	24,424	12,280
US Treasury Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		4,720
US Treasury Securities [Member] | Level I [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		4,720
U.S. Corporate bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		10,645
U.S. Corporate bonds [Member] | Level II [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		10,645
Foreign issued corporate bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		1,600
Foreign issued corporate bonds [Member] | Level II [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		1,600
Municipal Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		35
Municipal Bonds [Member] | Level II [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values		35
Long Duration fixed income funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	17,650
Long Duration fixed income funds [Member] | Level II [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	17,650
Investment grade fixed income funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	6,774
Investment grade fixed income funds [Member] | Level II [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	6,774
Money market [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	184	3,510
Money market [Member] | Level I [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cumulative Fair Values	$ 184	$ 3,510