Note M - Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Pension Plan [Member]
Net loss	$ 15,514	$ 9,406	$ (6,303)
Prior service cost	58
Amortization of transition asset	(33)	(36)	(38)
Amortization of prior service cost	(59)		7
Amortization of net (loss) gain	(3,627)	(2,436)	(2,894)
Total recognized in other comprehensive income	11,853	6,934	(9,228)
Net periodic benefit cost	2,583	527	2,296
Total recognized in net periodic benefit cost and other comprehensive income	14,436	7,461	(6,932)
Other Postretirement Benefit Plan [Member]
Net loss	496	882	(59)
Prior service cost
Amortization of transition asset
Amortization of prior service cost
Amortization of net (loss) gain	(728)	(638)	(602)
Total recognized in other comprehensive income	(232)	244	(661)
Net periodic benefit cost	1,360	1,247	1,298
Total recognized in net periodic benefit cost and other comprehensive income	$ 1,128	$ 1,491	$ 637