Note M - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Pension Plan [Member]
Service cost	$ 770	$ 465	$ 536
Interest cost	4,968	4,862	5,425
Expected return on plan assets	(6,874)	(7,272)	(6,591)
Amortization of transition obligation	33	36	32
Amortization of prior service cost	59
Amortization of actuarial net loss	3,627	2,436	2,894
Net periodic benefit cost	2,583	527	2,296
Other Postretirement Benefit Plan [Member]
Service cost	28	30	37
Interest cost	604	579	659
Amortization of actuarial net loss	728	638	602
Net periodic benefit cost	$ 1,360	$ 1,247	$ 1,298