Note 12 - Employee Benefit and Retirement Plans (Details) - Medical and Life Insurance Benefits - Retired Employees (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Weighted average assumptions: benefit obligations
Discount rate		5.44%
Change in Benefit Obligations [Member] \| Postretirement Medical and Life Insurance Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	$ 14,230	$ 11,804	$ 11,603
Service cost	484	386	353
Interest cost	518	611	591
Benefits paid	(351)	(552)	(662)
Actuarial (gain) loss	(3,917)	1,981	(81)
Benefit obligation at end of year	10,964	14,230	11,804
Change in Plan Assets [Member] \| Postretirement Medical and Life Insurance Plan [Member]
Change in benefit obligation:
Fair value of plan assets at beginning of year	0	0	0
Employer contributions	351	552	662
Benefits paid	(351)	(552)	(662)
Fair value of plan assets at end of year	0	0	0
Amounts Recongnized in Balance Sheet [Member] \| Postretirement Medical and Life Insurance Plan [Member]
Amounts recognized in balance sheet
Current postretirement benefit obligation	(536)	(623)	(657)
Non-current postretirement benefit obligation	(10,428)	(13,606)	(11,147)
Net amount recognized	(10,964)	(14,230)	(11,804)
Components of Net Periodic Benefit Cost [Member] \| Postretirement Medical and Life Insurance Plan [Member]
Change in benefit obligation:
Service cost	484	386	353
Interest cost	518	611	591
Amortization of prior service credit	(743)	(905)	(905)
Amortization of accumulated loss	111	2	10
Net periodic benefit cost	370	94	49
Postretirement Medical and Life Insurance Plan [Member]
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
Prior service credit	502	905	905
Net gain (loss)		(158)	(19)
	502	747	886
Healthcare cost trend rate assumed for next year	7.80%	8.80%	9.70%
Rate to which the cost trend rate gradually declines	4.50%	4.50%	4.50%
Year that the rate reaches the rate at which it is assumed to remain	2026
Amounts recognized in balance sheet
Prior service credit	1,145	1,888	2,793
Accumulated gain (loss)	627	(3,400)	(1,422)
Amounts not yet recognized as a component of net periodic benefit cost	1,772	(1,512)	1,371
Net periodic benefit cost in excess of accumulated contributions	(12,736)	(12,718)	(13,175)
Net amount recognized	$ (10,964)	$ (14,230)	$ (11,804)
Weighted average assumptions – net periodic benefit cost
Discount rate	3.92%	5.44%	5.37%
Rate of compensation increase	2.64%	2.64%	2.64%
Weighted average assumptions: benefit obligations
Discount rate	4.96%	3.92%	5.44%
Rate of compensation increase	2.64%	2.64%	2.64%

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The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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The amount of gains or losses recognized in net periodic benefit cost.

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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

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No definition available.

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The interest rate used to adjust for the time value of money for the plan.

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Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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Expected rate of compensation increases (for pay-related plans).

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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No definition available.

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Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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No definition available.

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The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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The ultimate trend rate for health care costs.

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Year the ultimate health care cost trend rate is expected to be reached, in CCYY format.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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