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Note 16 - Employee Benefit Plans (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Defined Benefit Plan, Accumulated Benefit Obligation | $ 283,900 | $ 301,600 |
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year | 4,500 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | 17,600 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two | 17,400 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three | 17,200 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four | 17,700 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 17,800 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter | 89,300 |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $ 1,400 |  |
Defined Contribution Plan Company Stock Held in Plan | 157,921 |  |
Retirement Savings Plans [Member] |  |  |
Defined Contribution Plans Number of Plans | 2 |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 3,700 | 4,000 | $ 4,000
Retirement Savings Plans [Member] | Salaried Employees [Member] |  |  |
Defined Contribution Plans Number of Plans | 1 |  |
Defined Contribution Plan Company Stock Held in Plan | 68,000 |  |
Defined Contribution Plan Company Stock, Percentage of Plan Assets | 6.26% |  |
Retirement Savings Plans [Member] | Hourly Employees [Member] |  |  |
Defined Contribution Plans Number of Plans | 1 |  |
UNITED STATES |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 4.40% |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets | 7.00% |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 5,750 | $ 284 |

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- Definition The amount of outstanding options held by the defined contribution plan. + References No definition available. + Details
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- Definition The percentage of the monetary value of outstanding stock options against the value of outstanding plan assets. + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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