Earnings Per Share - Reconciliation of the Numerators and Denominators Used in the Basic and Diluted Per-Share Computations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Class A common stock
Income available to stockholders (Basic EPS)
Allocated net income (numerator)	$ 162,561	$ 116,887	$ 286,093	$ 202,422
Weighted shares (denominator) (in shares)	46,189,042	46,189,026	46,189,028	46,188,923
Per-share amount (in dollars per share)	$ 3.52	$ 2.53	$ 6.19	$ 4.38
Dilutive effect of stock-based awards
Allocated net income (numerator)	$ 0	$ 0	$ 0	$ 0
Weighted shares (denominator) (in shares)	15,457	10,148	13,723	8,575
Assumed conversion of Class B shares
Allocated net income (numerator)	$ 1,342	$ 965	$ 2,362	$ 1,671
Weighted shares (denominator) (in shares)	6,100,800	6,100,800	6,100,800	6,100,800
Income available to stockholders on equivalent shares (Diluted EPS)
Allocated net income (numerator)	$ 163,903	$ 117,852	$ 288,455	$ 204,093
Weighted shares (denominator) (in shares)	52,305,299	52,299,974	52,303,551	52,298,298
Per-share amount (in dollars per share)	$ 3.13	$ 2.25	$ 5.52	$ 3.90
Class B common stock
Income available to stockholders (Basic EPS)
Allocated net income (numerator)	$ 1,342	$ 965	$ 2,362	$ 1,671
Weighted shares (denominator) (in shares)	2,542	2,542	2,542	2,542
Per-share amount (in dollars per share)	$ 528	$ 380	$ 929	$ 657
Income available to stockholders on equivalent shares (Diluted EPS)
Allocated net income (numerator)	$ 1,342	$ 965	$ 2,361	$ 1,671
Weighted shares (denominator) (in shares)	2,542	2,542	2,542	2,542
Per-share amount (in dollars per share)	$ 528	$ 380	$ 929	$ 657