Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Net Periodic Benefit Cost
Interest cost	$ 18	$ 12	$ 36	$ 25
Expected return on plan assets	(2)	(3)	(8)	(7)
Recognized actuarial loss	16	18	41	38
Net periodic benefit cost	$ 32	$ 27	$ 69	$ 56