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Note 16 - Employee Benefit Plans - Target Asset Allocations (Details)	Jun. 30, 2020
U.S. Pension Plans [Member]
Target asset allocations	100.00%
U.K. Pension Plans [Member]
Target asset allocations	100.00%
Equity Securities [Member] | U.S. Pension Plans [Member]
Target asset allocations	40.00%
Equity Securities [Member] | U.K. Pension Plans [Member]
Target asset allocations	0.00%
Debt Securities [Member] | U.S. Pension Plans [Member]
Target asset allocations	38.00%
Debt Securities [Member] | U.K. Pension Plans [Member]
Target asset allocations	70.00%
Hedge Funds, Global Opportunity [Member] | U.S. Pension Plans [Member]
Target asset allocations	12.00%
Hedge Funds, Global Opportunity [Member] | U.K. Pension Plans [Member]
Target asset allocations	29.00%
Other Debt Obligations [Member] | U.S. Pension Plans [Member]
Target asset allocations	10.00%
Other Debt Obligations [Member] | U.K. Pension Plans [Member]
Target asset allocations	1.00%

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ 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=118257860&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

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- Details

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- Details

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- Details

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