Note 6 - Pension and Post-retirement Benefits - Net Periodic Costs (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Service cost	$ 791	$ 714
Interest cost	1,552	1,768
Expected return on plan assets	(1,306)	(1,594)
Amortization of net loss	28	14
	$ 1,065	$ 902