UNAUDITED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Non-controlling Interest	Common Class A	Common Class A Common Stock	Common Class B	Common Class B Common Stock
Beginning Balance at Dec. 31, 2020	$ 108,955	$ 5,190	$ 132	$ 25,611	$ 77,849		$ 173
Beginning Balance (in shares) at Dec. 31, 2020							17,328,899		54,313,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of Non-Cash Compensation	2,145	462			1,683
Amortization of Non-Cash Compensation (in shares)							14,201		320,495
Issuance of Shares under Equity Incentive Plan	3,822	872			2,950
Issuance of Shares under Equity Incentive Plan (in shares)							12,353		805,987
Sale of Shares under Equity Incentive Plan	167	36			131
Sale of Shares under Equity Incentive Plan (in shares)								26,097	26,097
Directors' Share Grants	247	53			194
Directors' Share Grants (in shares)							12,338
Net Income	25,029			4,187	20,842
Foreign Currency Translation Adjustments	(12)		(5)		(7)
Repurchase and Retirement of Class A Common Stock	(2,390)	(516)			(1,871)		$ (3)
Repurchase and Retirement Shares/Units (in shares)						(275,218)	(275,218)	(18,476)	(18,476)
Repurchase and Retirement of Class B Units	(90)	(20)			(70)
Class A Cash Dividends Declared and Paid	(4,302)			(4,302)
Tax Impact of Transactions with Non-Controlling Shareholders	(494)	(494)
Contributions from Non-Controlling Interests	303				303
Distributions to Non-Controlling Interests	(29,725)				(29,725)
Other		(541)			541
Ending Balance at Mar. 31, 2021	103,655	5,042	127	25,496	72,820		$ 170
Ending Balance (in shares) at Mar. 31, 2021							17,092,573		55,447,723
Beginning Balance at Dec. 31, 2021	178,054	3,989	7	38,420	135,466		$ 172
Beginning Balance (in shares) at Dec. 31, 2021						17,306,455	17,306,455	54,203,277	55,203,277
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of Non-Cash Compensation	2,079	431			1,648
Amortization of Non-Cash Compensation (in shares)							15,539		310,369
Issuance of Shares under Equity Incentive Plan	6,787	1,528			5,259
Issuance of Shares under Equity Incentive Plan (in shares)									1,084,675
Sale of Shares under Equity Incentive Plan	729	151			578
Sale of Shares under Equity Incentive Plan (in shares)							18,057	138,238	138,238
Directors' Share Grants	436	91			345
Directors' Share Grants (in shares)							29,713
Net Income	18,482			2,815	15,667
Foreign Currency Translation Adjustments	(134)		(2)		(132)
Repurchase and Retirement of Class A Common Stock	(2,365)	(491)			(1,873)		$ (1)
Repurchase and Retirement Shares/Units (in shares)						(263,362)	(263,362)	(9,819)	(9,819)
Repurchase and Retirement of Class B Units	(64)	(13)			(51)
Class A Cash Dividends Declared and Paid	(9,209)			(9,209)
Tax Impact of Transactions with Non-Controlling Shareholders	(829)	(829)
Effect of Deconsolidation	(26,755)				(26,755)
Contributions from Non-Controlling Interests	11,838				11,838
Distributions to Non-Controlling Interests	(47,005)				(47,005)
Other		254			(254)
Ending Balance at Mar. 31, 2022	$ 132,044	$ 5,111	$ 5	$ 32,026	$ 94,731		$ 171
Ending Balance (in shares) at Mar. 31, 2022						17,106,402	17,106,402	56,726,740	56,726,740