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Note 21 - Fair Value of Financial Instruments - Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Limited liability investments, at fair value	$ 0	$ 13,863
Trust Preferred Debt Repurchase Options Contracts [Member]
Derivative - trust preferred debt repurchase options, at fair value		19,000
Limited Liability Investments [Member]
Limited liability investments, at fair value	3,599	17,059
Fair Value, Inputs, Level 3 [Member] | Trust Preferred Debt Repurchase Options Contracts [Member]
Derivative - trust preferred debt repurchase options, at fair value		19,034
Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Limited Liability Investments [Member]
Limited liability investments, at fair value	$ 3,599	3,196
Valuation Multiples [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Minimum [Member]
Limited liability investments, measurement input	1
Valuation Multiples [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Maximum [Member]
Limited liability investments, measurement input	9
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member]
Contingent consideration, at fair value	$ 3,283	$ 3,218
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate [Member]
Contingent consideration, measurement input	0.0825	0.0825
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Risk Free Interest Rate [Member]
Contingent consideration, measurement input	0.043	0.0444
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Price Volatility [Member]
Contingent consideration, measurement input	0.13	0.13
Derivative, measurement input		0.023
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Expected Term [Member] | Minimum [Member]
Contingent consideration, measurement input		10.4
Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Expected Term [Member] | Maximum [Member]
Contingent consideration, measurement input		10.59
Binomial Lattice Option Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Credit Spread [Member] | Trust Preferred Debt Repurchase Options Contracts [Member]
Derivative, measurement input		0.0895
Binomial Lattice Option Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Expected Term [Member] | Minimum [Member] | Trust Preferred Debt Repurchase Options Contracts [Member]
Derivative, measurement input		0.0872
Binomial Lattice Option Approach [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Expected Term [Member] | Maximum [Member] | Trust Preferred Debt Repurchase Options Contracts [Member]
Derivative, measurement input		0.0887

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Value of input used to measure equity method investments.

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