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Note 13 - Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Finite-lived intangible assets, gross | $ 151.9 | $ 153.9
Less accumulated amortization | (61.3) | (47.1)
Total identifiable intangible assets, net | 90.6 | 106.8
Customer Relationships [Member] |  |
Finite-lived intangible assets, gross | $ 129.9 | 131.7
Weighted average amortization period (Year) | 11 years 1 month 6 days |
Noncompete Agreements [Member] |  |
Finite-lived intangible assets, gross | $ 7.3 | 7.9
Weighted average amortization period (Year) | 6 years 8 months 12 days |
Trade Names [Member] |  |
Finite-lived intangible assets, gross | $ 4.2 | 3.8
Weighted average amortization period (Year) | 2 years 1 month 6 days |
LDC Network Access [Member] |  |
Finite-lived intangible assets, gross | $ 10.5 | $ 10.5
Weighted average amortization period (Year) | 10 years |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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