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Note 17 - Employee Benefit Plans - Fair Values of Pension Plans (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jun. 30, 2018
--- | --- | ---
Fair value of pension plan assets | $ 225,870 | $ 229,077
Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 9,468 | 23,389
Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 216,402 | 205,688
Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |
Cash and Cash Equivalents [Member] |  |
Fair value of pension plan assets | 7,696 | 4,482
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 439 | 325
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 7,257 | 4,157
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |
Equity Securities [Member] |  |
Fair value of pension plan assets | 86,415 | 89,934
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 1,866 | 16,353
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 84,549 | 73,581
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |
US Government Agencies Debt Securities [Member] |  |
Fair value of pension plan assets | 9,161 | 14,461
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets |  |
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 9,161 | 14,461
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |
Corporate Bonds and Other Fixed Income Securities [Member] |  |
Fair value of pension plan assets | 97,627 | 102,105
Corporate Bonds and Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 7,163 | 6,711
Corporate Bonds and Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 90,464 | 95,394
Corporate Bonds and Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |
Other Debt Obligations [Member] |  |
Fair value of pension plan assets | 24,971 | 18,095
Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets |  |
Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 24,971 | 18,095
Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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=118255775&loc=d3e1928-114920 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=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: 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=118257860&loc=d3e4179-114921 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) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 6: 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=118255775&loc=d3e1928-114920 + Details
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