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Note 10 - Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Gross carrying amount | $ 578,180 | $ 519,410
Accumulated amortization | 199,418 | 153,186
Net | 378,762 | 366,224
Customer Relationships [Member] |  |
Gross carrying amount | 403,976 | 360,228
Accumulated amortization | 103,884 | 71,474
Net | 300,092 | 288,754
Franchise Rights [Member] |  |
Gross carrying amount | 49,925 | 49,806
Accumulated amortization | 29,930 | 26,707
Net | 19,995 | 23,099
Trademarks and Trade Names [Member] |  |
Gross carrying amount | 29,765 | 30,303
Accumulated amortization | 20,051 | 18,543
Net | 9,714 | 11,760
Other Intangible Assets [Member] |  |
Gross carrying amount | 94,514 | 79,073
Accumulated amortization | 45,553 | 36,462
Net | $ 48,961 | $ 42,611

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