Note 6 - Pension and Post-retirement Benefits (Details) - Net Periodic Benefit Costs for Defined Benefit Pension Plans (Pension Plan, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Pension Plan, Defined Benefit [Member]
Note 6 - Pension and Post-retirement Benefits (Details) - Net Periodic Benefit Costs for Defined Benefit Pension Plans [Line Items]
Service cost	$ 716	$ 734	$ 2,139	$ 2,210
Interest cost	1,746	1,477	5,197	4,464
Expected return on plan assets	(1,589)	(1,490)	(4,732)	(4,497)
Amortization of prior service cost	29	59	87	176
Amortization of net gain	2		8
	$ 904	$ 780	$ 2,699	$ 2,353