Note 6 - Pension and Post-retirement Benefits (Detail) - Net periodic benefit costs for defined benefit pension plans (Pension Plans, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Pension Plans, Defined Benefit [Member]
Service cost	$ 734	$ 573	$ 2,210	$ 1,720
Interest cost	1,477	1,656	4,464	4,970
Expected return on plan assets	(1,490)	(1,654)	(4,497)	(4,962)
Amortization of prior service cost	59	59	176	176
Amortization of net gain		(1)		(3)
	$ 780	$ 633	$ 2,353	$ 1,901