Note 6 - Pension and Post-Retirement Benefits - Net Periodic Costs (Details) (Pension Plan [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Pension Plan [Member]
Service cost	$ 694	$ 714	$ 1,388	$ 1,423
Interest cost	1,722	1,736	3,412	3,451
Expected return on plan assets	(1,772)	(1,581)	(3,512)	(3,143)
Amortization of prior service cost		29		58
Amortization of net gain	(7)	(3)	(14)	(6)
	$ 651	$ 901	$ 1,302	$ 1,795