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Note 16 - Employee Benefit Plans - Fair Values of Pension Plans (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017
--- | --- | ---
Fair value of pension plan assets | $ 229,077 | $ 232,249
Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 23,389 | 24,156
Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 205,688 | 208,093
Fair Value, Inputs, Level 3 [Member] |  |
Fair value of pension plan assets |  |
Cash and Cash Equivalents [Member] |  |
Fair value of pension plan assets | 4,482 | 11,160
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 325 | 452
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 4,157 | 10,708
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 | 89,934 | 94,951
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 16,353 | 16,976
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 73,581 | 77,975
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 | 14,461 | 11,989
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 | 14,461 | 11,989
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 | 102,105 | 97,691
Corporate Bonds and Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair value of pension plan assets | 6,711 | 6,728
Corporate Bonds and Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair value of pension plan assets | 95,394 | 90,963
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 | 18,095 | 16,458
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 | 18,095 | 16,458
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=108410482&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=108410482&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=108410482&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=112275985&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=108410482&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=108410482&loc=d3e1928-114920 + Details
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