Note 13 - Employee Benefit Plans (Details) - Changes in the postretirement benefit obligation and the funded status (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Note 13 - Employee Benefit Plans (Details) - Changes in the postretirement benefit obligation and the funded status [Line Items]
Benefit obligation	$ 21,681	$ 16,653
Under funded status	(6,088)	(9,069)
Minimum postretirement liability adjustment	(4,569)	(6,583)
Service cost	446	344	370
Interest cost	849	902	849
Actuarial loss (gain)	(1,721)	4,247
Benefits paid	(582)	(465)
Benefit obligation	20,673	21,681	16,653
Postretirement Health Benefit Plan [Member]
Note 13 - Employee Benefit Plans (Details) - Changes in the postretirement benefit obligation and the funded status [Line Items]
Benefit obligation	537	1,412
Under funded status	(510)	(537)
Accrued postretirement benefit cost	(510)	(537)
Minimum postretirement liability adjustment	(1,109)	(1,242)
Service cost	11	19	32
Interest cost	16	37	68
Plan participants’ contributions	42	98
Amendments		(1,203)
Actuarial loss (gain)	(79)	257
Benefits paid	(33)	(97)
Medicare Part D prescription drug subsidy	16	14
Benefit obligation	$ 510	$ 537	$ 1,412