Note 6 - Pension and Post-retirement Benefits (Tables)

9 Months Ended

Mar. 31, 2013

Pension Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended						Nine Months Ended
	3/31/2013			3/31/2012			3/31/2013			3/31/2012
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

Postretirement Medical Plan [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended						Nine Months Ended
	3/31/2013			3/31/2012			3/31/2013			3/31/2012
Service cost	$	127		$	96		$	383		$	288
Interest cost		136			155			409			467
Amortization of prior service credit		(185	)		(226	)		(557	)		(679	)
Amortization of accumulated loss		40			4			119			14
	$	118		$	29		$	354		$	90