CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total		Common Class A	Common Class B	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-In Capital	Accumulated Other Comprehensive Income/ (Loss)	Retained Earnings	Non-Controlling Interests
Beginning Balance at Dec. 31, 2019	$ 108,210				$ 179		$ 4,829	$ (3)	$ 26,439	$ 76,766
Beginning Balance (in shares) at Dec. 31, 2019					18,009,350	52,879,323
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unit Conversion	390	[1]			$ 5		1,007			(622)
Unit Conversion (in shares)					494,316	(494,316)
Amortization of Non-Cash Compensation	8,166				$ 1		1,838			6,327
Amortization of Non-Cash Compensation (in shares)					20,000	859,811
Issuance of Shares under Equity Incentive Plan	3,842						890			2,952
Issuance of Shares under Equity Incentive Plan (in shares)						637,349
Sale of Shares Under Equity Incentive Plan	2,295						523			1,772
Sale of Shares Under Equity Incentive Plan (in shares)				554,860		554,860
Modification, shares					16,806	(16,806)
Directors' Shares	455						103			352
Net Income	51,538	[1]							8,874	42,664
Foreign Currency Translation Adjustments	$ 565							135		430
Options Exercised (in shares)	19,661					603
Repurchase and Retirement of Class A Common Stock	$ (7,663)				$ (12)		(1,723)			(5,928)
Repurchase and Retirement Shares/Units (in shares)			(1,211,573)	(107,204)	1,211,573	107,204
Repurchase and Retirement of Class B Units	(640)						(131)			(509)
Effect of Deconsolidation	(1,685)									(1,685)
Contributions from Non-Controlling Interests	1,013									1,013
Distributions to Non-Controlling Interests	(47,590)									(47,590)
Class A Cash Dividends Declared and Paid	(9,702)								(9,702)
Tax Impact of Transactions with Non-Controlling Shareholders	(239)						(239)
Other							(1,907)			1,907
Ending Balance at Dec. 31, 2020	108,955				$ 173		5,190	132	25,611	77,849
Ending Balance (in shares) at Dec. 31, 2020			17,328,899	54,313,620	17,328,899	54,313,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unit Conversion	321				$ 8		1,430			(1,117)
Unit Conversion (in shares)					790,414	(790,414)
Amortization of Non-Cash Compensation	8,989						1,977			7,012
Amortization of Non-Cash Compensation (in shares)					24,201	851,263
Issuance of Shares under Equity Incentive Plan	3,852						879			2,973
Issuance of Shares under Equity Incentive Plan (in shares)					12,353	810,857
Sale of Shares Under Equity Incentive Plan	315						68			247
Sale of Shares Under Equity Incentive Plan (in shares)				49,081		49,081
Directors' Shares	646						141			505
Directors' Shares (in shares)					16,144
Net Income	106,477								18,679	87,798
Foreign Currency Translation Adjustments	$ (866)							(125)		(741)
Options Exercised (in shares)	61,334					32,947
Repurchase and Retirement of Class A Common Stock	$ (8,655)				$ (9)		(1,895)			(6,751)
Repurchase and Retirement Shares/Units (in shares)			(865,556)	(64,077)	(865,556)	(64,077)
Repurchase and Retirement of Class B Unit Options	(491)						(107)			(384)
Effect of Consolidation	9,730									9,730
Contributions from Non-Controlling Interests	30,023									30,023
Distributions to Non-Controlling Interests	(73,773)									(73,773)
Class A Cash Dividends Declared and Paid	(5,870)								(5,870)
Tax Impact of Transactions with Non-Controlling Shareholders	(1,599)						(1,599)
Other							(2,095)			2,095
Ending Balance at Dec. 31, 2021	$ 178,054				$ 172		$ 3,989	$ 7	$ 38,420	$ 135,466
Ending Balance (in shares) at Dec. 31, 2021			17,306,455	55,203,277	17,306,455	55,203,277

[1] Net consolidation (Deconsolidation) of Sponsored Investment Funds have been reclassified to conform to the current year presentation.