Consolidated Statements of Stockholders Equity - USD ($) $ in Millions	Class A Common Stock	Class B Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss.	Total
Balance at the beginning of the period at Dec. 31, 2022	$ 2.7	$ 0.6	$ 651.9	$ 795.3	$ (149.9)	$ 1,300.6
Balance (in shares) at Dec. 31, 2022	27,314,679	5,958,290
Increase (Decrease) in Stockholders' Equity
Net income				64.7		64.7
Other comprehensive income (loss)					2.7	2.7
Comprehensive income						67.4
Shares of Class A common stock issued upon the exercise of stock options			0.1			0.1
Shares of Class A common stock issued upon the exercise of stock options (in shares)	547
Stock-based compensation			4.0			4.0
Stock repurchase				(3.7)		(3.7)
Stock repurchase (in shares)	(22,473)
Net change in restricted and performance stock units			2.1	(14.6)		(12.5)
Net change in restricted and performance stock units (in shares)	121,647
Common stock dividends				(10.1)		(10.1)
Balance at the end of the period at Mar. 26, 2023	$ 2.7	$ 0.6	658.1	831.6	(147.2)	1,345.8
Balance (in shares) at Mar. 26, 2023	27,414,400	5,958,290
Balance at the beginning of the period at Dec. 31, 2023	$ 2.7	$ 0.6	674.3	979.1	(143.4)	1,513.3
Balance (in shares) at Dec. 31, 2023	27,352,701	5,958,290
Increase (Decrease) in Stockholders' Equity
Net income				72.6		72.6
Other comprehensive income (loss)					(11.5)	(11.5)
Comprehensive income						61.1
Stock-based compensation			4.0			4.0
Stock repurchase				(4.0)		(4.0)
Stock repurchase (in shares)	(19,750)
Net change in restricted and performance stock units			2.3	(12.8)		(10.5)
Net change in restricted and performance stock units (in shares)	85,498
Common stock dividends				(12.1)		(12.1)
Balance at the end of the period at Mar. 31, 2024	$ 2.7	$ 0.6	$ 680.6	$ 1,022.8	$ (154.9)	$ 1,551.8
Balance (in shares) at Mar. 31, 2024	27,418,449	5,958,290