Benefit Plans Benefit Plans 1 (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Pension Plan [Member]
Amounts recognized in the consolidated balance sheets:
Other current liabilities	$ 3,352	$ 3,298
Other liabilities	7,242	10,534
Net amount recognized	10,594	13,832
Amounts recognized in accumulated other comprehensive loss:
Net actuarial (loss) gain	(4,995)	(4,781)
Prior service cost	0	0
Total amounts recognized in accumulated other comprehensive loss	(4,995)	(4,781)
Postretirement Health Coverage [Member]
Amounts recognized in the consolidated balance sheets:
Other current liabilities	155	220
Other liabilities	1,351	1,271
Net amount recognized	1,506	1,491
Amounts recognized in accumulated other comprehensive loss:
Net actuarial (loss) gain	977	1,121
Prior service cost	184	554
Total amounts recognized in accumulated other comprehensive loss	$ 1,161	$ 1,675