Note 6 - Net Periodic Costs (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Service cost	$ 715	$ 694	$ 1,429	$ 1,388
Interest cost	1,759	1,722	3,527	3,412
Expected return on plan assets	(1,585)	(1,772)	(3,179)	(3,512)
Amortization of net loss	12	7	26	14
	$ 901	$ 651	$ 1,803	$ 1,302