Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Federal [Abstract]
Current	$ 8,512	$ 9,051
Deferred	7,966	(193)
State and local [Abstract]
Current	453	532
Deferred	722	(16)
Foreign [Abstract]
Current	36	0
Deferred	16	0
Total	$ 17,705	$ 9,374
Reconciliation of the Federal statutory rate to the effective tax rate [Abstract]
Statutory Federal income tax rate	21.00%	21.00%
State income tax, net of Federal benefit	1.20%	1.30%
Dividends received deduction	(1.00%)	(1.40%)
Deferred tax asset valuation allowance	(0.50%)	1.50%
Foreign investments	(0.50%)	9.90%
Foreign-derived intangible income	(0.70%)	0.00%
Noncontrolling interests	(1.10%)	(1.30%)
Nondeductible compensation	2.00%	0.00%
Other	1.40%	0.40%
Effective income tax rate	21.80%	31.40%
Deferred tax assets [Abstract]
Stock-based compensation expense	$ 683	$ 430
Deferred compensation	277	1,825
Shareholder-designated contribution carryover	2,990	3,244
Other	755	53
Total deferred tax assets	4,705	5,552
Deferred tax liabilities [Abstract]
Investments in securities and partnerships	(9,683)	(1,300)
Other liabilities	(182)	(201)
Total deferred tax liabilities	(9,865)	(1,501)
Gross deferred tax liabilities	(5,160)
Gross deferred tax assets		4,051
Valuation allowance	(1,336)	(1,844)
Net deferred tax liabilities	$ (6,496)
Net deferred tax assets		$ 2,207