Note 13 - Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2012 Defined Contribution Pension [Member]	Jun. 30, 2011 Defined Contribution Pension [Member]	Jun. 30, 2010 Defined Contribution Pension [Member]	Jun. 30, 2012 Share-based Compensation [Member]	Jun. 30, 2011 Share-based Compensation [Member]	Jun. 30, 2010 Share-based Compensation [Member]	Jun. 30, 2012 Profit Sharing Plan [Member]	Jun. 30, 2011 Profit Sharing Plan [Member]	Jun. 30, 2010 Profit Sharing Plan [Member]	Jun. 30, 2012 Large-Cap Domestic Equities [Member]	Jun. 30, 2012 Mid-Cap Domestic Equities [Member]	Jun. 30, 2012 Small-Cap Domestic Equities [Member]	Jun. 30, 2012 International Equities [Member]	Jun. 30, 2012 Broad Bond Market [Member]	Jun. 30, 2012 Postretirement Health Benefit Plan [Member]	Jun. 30, 2011 Postretirement Health Benefit Plan [Member]	Jun. 30, 2010 Postretirement Health Benefit Plan [Member]
Note 13 - Employee Benefit Plans (Details) [Line Items]
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Net of Tax	$ 0.5
Defined Benefit Plan, Target Plan Asset Allocations	100.00%	100.00%										30.00%	11.00%	11.00%	8.00%	40.00%
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		1.1
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year		0.4
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		5.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 1.8	$ 1.8	$ 1.8	$ 0.2	$ 0.2	$ 0.2	$ 0.4	$ 1.0	$ 0.8
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.59%	3.96%															3.64%	3.22%	5.20%