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
	Mar. 31, 2025	Mar. 31, 2024
Class A common stock
Income available to stockholders (Basic EPS)
Allocated net income (numerator)	$ 137,284	$ 123,532
Weighted shares (denominator) (in shares)	46,188,903	46,189,014
Per-share amount (in dollars per share)	$ 2.97	$ 2.67
Dilutive effect of stock-based awards
Allocated net income (numerator)	$ 0	$ 0
Weighted shares (denominator) (in shares)	14,681	11,989
Assumed conversion of Class B shares
Allocated net income (numerator)	$ 1,133	$ 1,020
Weighted shares (denominator) (in shares)	6,100,800	6,100,800
Income available to stockholders on equivalent shares (Diluted EPS)
Allocated net income (numerator)	$ 138,417	$ 124,552
Weighted shares (denominator) (in shares)	52,304,384	52,301,803
Per-share amount (in dollars per share)	$ 2.65	$ 2.38
Class B common stock
Income available to stockholders (Basic EPS)
Allocated net income (numerator)	$ 1,133	$ 1,020
Weighted shares (denominator) (in shares)	2,542	2,542
Per-share amount (in dollars per share)	$ 446	$ 401
Income available to stockholders on equivalent shares (Diluted EPS)
Allocated net income (numerator)	$ 1,133	$ 1,020
Weighted shares (denominator) (in shares)	2,542	2,542
Per-share amount (in dollars per share)	$ 446	$ 401