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Note 11 - Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Indefinite life intangible assets | $ 52,608 | $ 52,485
Finite life intangible assets, gross | 1,535,475 | 1,506,532
Accumulated amortization | 507,612 | 399,107
Finite life intangible assets, net | 1,027,863 | 1,107,425
Intangible assets, gross | 1,588,083 | 1,559,017
Intangible assets, net | 1,080,471 | 1,159,910
Customer Lists and Relationships [Member] |  |
Finite life intangible assets, gross | 707,355 | 695,007
Accumulated amortization | 218,435 | 187,743
Finite life intangible assets, net | 488,920 | 507,264
Investment Management Contracts [Member] |  |
Finite life intangible assets, gross | 591,826 | 589,885
Accumulated amortization | 181,653 | 126,904
Finite life intangible assets, net | 410,173 | 462,981
Mortgage Servicing Rights ("MSRs") [Member] |  |
Finite life intangible assets, gross | 188,489 | 170,213
Accumulated amortization | 84,058 | 65,771
Finite life intangible assets, net | 104,431 | 104,442
Trademarks and Trade Names [Member] |  |
Finite life intangible assets, gross | 27,563 | 27,702
Accumulated amortization | 7,486 | 4,389
Finite life intangible assets, net | 20,077 | 23,313
Management Contracts and Other [Member] |  |
Finite life intangible assets, gross | 13,893 | 15,426
Accumulated amortization | 10,547 | 10,635
Finite life intangible assets, net | 3,346 | 4,791
Brokerage Backlog [Member] |  |
Finite life intangible assets, gross | 6,349 | 8,299
Accumulated amortization | 5,433 | 3,665
Finite life intangible assets, net | 916 | 4,634
Licensing Agreements [Member] |  |
Indefinite life intangible assets | 29,200 | 29,200
Trademark and Trade Names [Member] |  |
Indefinite life intangible assets | $ 23,408 | $ 23,285

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