Earnings per Share - Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Diluted Net Income Allocated to:
Total Diluted Net Income Attributable to Shareholders		$ 12,782	$ 22,663	$ 39,026	$ 63,571
Basic Weighted Average Shares Outstanding (in shares)	[1]	16,744,993	17,694,559	17,019,499	17,398,518
Dilutive Effect of B Units (in shares)		56,969,703	54,699,539	56,813,393	55,134,505
Dilutive Effect of Options (in shares)	[2]	1,007,627	1,725,381	739,637	1,569,185
Dilutive Effect of Phantom Class B Units & Phantom Shares of Class A Common Stock (in shares)		2,181,022	2,786,184	1,978,399	2,640,566
Dilutive Effect of Restricted Shares of Class A Common Stock (in shares)	[3]	21,032	34,672	17,987	32,579
Diluted Weighted Average Common Shares Outstanding (in shares)		76,924,377	76,940,335	76,568,915	76,775,353
Participating Class B Units and Class B-1 Units (in shares)	[4]	9,620,203	7,257,283	9,620,203	7,245,358
Diluted Weighted-Average Shares Outstanding (in shares)	[1]	86,544,580	84,197,618	86,189,118	84,020,711
Diluted Earnings per Share (in dollars per share)		$ 0.15	$ 0.27	$ 0.45	$ 0.76
Options to Purchase Class B Units
Diluted Net Income Allocated to:
Antidilutive securities excluded from diluted EPS (in shares)		300,000	300,000	300,000	300,000
Options to Purchase Shares of Class A Common Stock
Diluted Net Income Allocated to:
Antidilutive securities excluded from diluted EPS (in shares)		200,000	100,000	200,000	100,000
Contingent Options to Purchase Shares of Class A Common Stock
Diluted Net Income Allocated to:
Antidilutive securities excluded from diluted EPS (in shares)			1,000,000.0		1,000,000.0
Common Class A
Diluted Net Income Allocated to:
Total Diluted Net Income Attributable to Shareholders		$ 11,299	$ 20,592	$ 34,506	$ 57,781
Basic Weighted Average Shares Outstanding (in shares)		16,702,721	17,674,063	16,975,983	17,377,767
Participating Shares of Restricted Class A Common Stock
Diluted Net Income Allocated to:
Total Diluted Net Income Attributable to Shareholders		$ 7	$ 6	$ 21	$ 17
Basic Weighted Average Shares Outstanding (in shares)	[5]	42,272	20,496	43,516	20,751
Participating Class B Units
Diluted Net Income Allocated to:
Total Diluted Net Income Attributable to Shareholders		$ 1,476	$ 2,065	$ 4,499	$ 5,773

[1] The Company issues restricted shares of Class A common stock and restricted Class B units that have non-forfeitable dividend rights. Under the "two-class method," these shares and units are considered participating securities and are required to be included in the computation of basic and diluted earnings per share.

[2] Represents the dilutive effect of options to purchase operating company Class B units and Company Class A common stock

[3] Certain restricted shares of Class A common stock granted to employees are not entitled to dividend or dividend equivalent payments until they are vested and are therefore non-participating securities and are not included in the computation of basic earnings per share. They are included in the computation of diluted earnings per share when the effect is dilutive using the treasury stock method

[4] Unvested Class B units granted to employees have nonforfeitable rights to dividend equivalent distributions and therefore participate fully in the results of the operating company's operations from the date they are granted. Vested and unvested Class B-1 units are entitled to receive distributions for the duration of the holder’s employment with the operating company, will participate in additional value to the extent there has been appreciation subsequent to the issuance of the Class B-1 membership unit. Unvested Class B units and vested and unvested Class B-1 units are included in the computation of diluted earnings per share using the two-class method for participating securities.

[5] Certain unvested shares of Class A common stock granted to employees have nonforfeitable rights to dividends and therefore participate fully in the results of the Company from the date they are granted. They are included in the computation of basic earnings per share using the two-class method for participating securities