Income Taxes Summary of Operating Loss Carryforwards (Details) (annual) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Gross	$ 84,165,000	$ 83,739,000
Deferred Tax Liabilities, Gross	31,423,000	57,748,000
Other	5,926,000	3,643,000
Deferred Tax Assets, Valuation Allowance	1,932,000	$ 4,226,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Valuation Allowance	600,000
Tax Credit Carryforward, Amount	1,100,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Taxes payable	13,200,000
Operating Loss Carryforwards	24,700,000
Inland Revenue, Hong Kong [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	11,700,000
New York State Division of Taxation and Finance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	16,000,000.0
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Income Taxes Receivable	10,900,000
Operating Loss Carryforwards	15,200,000
Luxembourg Reinsurance Companies [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Liabilities, Gross	39,700,000
Other	176,700,000
Deferred Tax Assets, Valuation Allowance	176,700,000
LaBranche and Co Inc. [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	10,200,000
Deferred tax asset, deduction limitation	$ 6,700,000