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Note 11 - Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Indefinite life intangible assets | $ 53,296 | $ 23,810
Indefinite life intangible assets, net | 53,296 | 23,810
Finite life intangible assets, gross | 788,573 | 623,700
Accumulated amortization | 231,539 | 170,056
Finite life intangible assets, net | 557,034 | 453,644
Intangible assets, gross | 841,869 | 647,510
Intangible assets, net | 610,330 | 477,454
Accumulated amortization | 231,539 | 170,056
Customer Lists and Relationships [Member] |  |
Finite life intangible assets, gross | 345,511 | 310,856
Accumulated amortization | 123,368 | 115,987
Finite life intangible assets, net | 222,143 | 194,869
Accumulated amortization | 123,368 | 115,987
Investment Management Contracts [Member] |  |
Finite life intangible assets, gross | 270,600 | 270,600
Accumulated amortization | 60,723 | 36,434
Finite life intangible assets, net | 209,877 | 234,166
Accumulated amortization | 60,723 | 36,434
Mortgage Servicing Rights ("MSRs") [Member] |  |
Finite life intangible assets, gross | 114,909 |
Accumulated amortization | 13,121 |
Finite life intangible assets, net | 101,788 |
Accumulated amortization | 13,121 |
Franchise Rights [Member] |  |
Finite life intangible assets, gross | 5,630 | 5,163
Accumulated amortization | 5,322 | 4,505
Finite life intangible assets, net | 308 | 658
Accumulated amortization | 5,322 | 4,505
Trademarks and Trade Names [Member] |  |
Finite life intangible assets, gross | 14,803 | 12,435
Accumulated amortization | 4,355 | 2,398
Finite life intangible assets, net | 10,448 | 10,037
Accumulated amortization | 4,355 | 2,398
Management Contracts and Other [Member] |  |
Finite life intangible assets, gross | 20,813 | 16,088
Accumulated amortization | 12,406 | 9,306
Finite life intangible assets, net | 8,407 | 6,782
Accumulated amortization | 12,406 | 9,306
Brokerage Backlog [Member] |  |
Finite life intangible assets, gross | 16,307 | 8,558
Accumulated amortization | 12,244 | 1,426
Finite life intangible assets, net | 4,063 | 7,132
Accumulated amortization | 12,244 | 1,426
Licensing Agreements [Member] |  |
Indefinite life intangible assets | 29,200 |
Indefinite life intangible assets, net | 29,200 |
Trademark and Trade Names [Member] |  |
Indefinite life intangible assets | 24,096 | 23,810
Indefinite life intangible assets, net | $ 24,096 | $ 23,810

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