Income Taxes Summary of Operating Loss Carryforwards (Details) (annual) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Gross	$ 83,739,000	$ 76,109,000
Deferred Tax Liabilities, Gross	57,748,000	61,885,000
Other	7,134,000	7,371,000
Deferred Tax Assets, Valuation Allowance	4,226,000	$ 5,194,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Valuation Allowance	3,100,000
Tax Credit Carryforward, Amount	3,200,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	64,500,000
Inland Revenue, Hong Kong [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	13,300,000
New York State Division of Taxation and Finance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	31,900,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	16,900,000
Luxembourg Reinsurance Companies [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Liabilities, Gross	76,500,000
Other	130,600,000
Deferred Tax Assets, Valuation Allowance	130,600,000
LaBranche and Co Inc. [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	16,900,000
Deferred tax asset, deduction limitation	$ 6,700,000