Stockholders’ Equity - Common Stock Repurchases and Treasury Stock (Details) - USD ($)				1 Months Ended		12 Months Ended
	Dec. 23, 2020	Feb. 21, 2020	Mar. 07, 2019	Nov. 30, 2021	Dec. 31, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2021	Sep. 13, 2021	Mar. 31, 2021	Mar. 10, 2021
Class of Stock [Line Items]
Repurchase of common stock							$ 69,378,000	$ 28,465,000
Class A
Class of Stock [Line Items]
Repurchase of common stock (in shares)				281,725
Repurchase of common stock (in dollars per share)				$ 30.10
Repurchase of common stock				$ 8,500,000		$ 36,332,000
Class A | Common Stock
Class of Stock [Line Items]
Repurchase of common stock (in shares)						1,175,119
Stock repurchase program, authorized amount									$ 50,000,000
Class A | Common Stock | Clean-Up Merger
Class of Stock [Line Items]
Repurchase of common stock (in shares)						893,394
Repurchase of common stock (in dollars per share)						$ 31.18
Repurchase of common stock						$ 27,900,000
Class A | Maximum | Common Stock
Class of Stock [Line Items]
Stock repurchase program, authorized amount										$ 50,000,000
Class B
Class of Stock [Line Items]
Repurchase of common stock						$ 9,563,000
Treasury stock, acquired (in shares)						565,232
Treasury stock acquired (in dollars per share)						$ 16.92
Treasury stock acquired						$ 9,600,000
Treasury stock, acquired, broker fees and other expenses		$ 300,000
Class B | Common Stock
Class of Stock [Line Items]
Repurchase of common stock (in shares)	4,249,785					565,232	5,182,244	2,112,321
Repurchase of common stock (in dollars per share)	$ 12.55
Repurchase of common stock	$ 54,100,000
Stock repurchase program, authorized amount											$ 40,000,000
Treasury stock, acquired (in shares)		932,459	2,112,321		1,400,000
Treasury stock acquired (in dollars per share)		$ 16.00	$ 13.48
Treasury stock acquired		$ 15,200,000	$ 28,500,000
Percent of shares outstanding under offer rules	2.00%
Stock repurchased during period, fees and expenses	$ 800,000
Treasury stock (in shares)			2,112,321
Class B | Maximum | Common Stock
Class of Stock [Line Items]
Stock repurchase program, authorized amount	$ 50,000,000											$ 40,000,000