Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Dec. 13, 2022	Jul. 29, 2022	May 24, 2022	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2021	May 15, 2020
Class of Stock [Line Items]
Preferred stock, authorized (in shares)	50,000,000		50,000,000
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001			$ 0.001
Preferred stock, issued (in shares)	0		0
Class A Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)	50,000,000		50,000,000			50,000,000
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock, issued (in shares)	10,884,575		10,884,575			10,868,556
Common stock, outstanding (in shares)	10,884,575	11,270,944	10,884,575	11,270,944	10,975,723	10,868,556	10,867,660	11,251,930	11,863,559	12,156,174	12,322,073	12,447,036	12,636,523
Class A Stock | New Program
Class of Stock [Line Items]
Repurchase of class A common stock (in shares)							543,000	536,500	550,000		518,000		530,000
Shares repurchased as a percent of shares outstanding (as a percent)							5.00%	4.80%	4.60%		4.20%		4.20%
Remaining amount authorized for repurchase (in shares)	495,844		495,844				687,034	540,778	621,893		530,407		628,625
Stock repurchased (in shares)	96,135	885,230	191,190	1,262,543
Total consideration for repurchase of stock	$ 3.6	$ 30.2	$ 7.3	$ 46.4
Stock repurchased (in dollars per share)	$ 37.43	$ 34.13	$ 38.11	$ 36.73
Class A Stock | Previous Program
Class of Stock [Line Items]
Remaining amount authorized for repurchase (in shares)							144,034	4,278	71,893		12,407		98,625
Class B Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)	99,665		99,665			99,665
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock, issued (in shares)	99,665		99,665			99,665
Common stock, outstanding (in shares)	99,665		99,665			99,665